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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vavilov</journal-id><journal-title-group><journal-title xml:lang="ru">Вавиловский журнал генетики и селекции</journal-title><trans-title-group xml:lang="en"><trans-title>Vavilov Journal of Genetics and Breeding</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2500-3259</issn><publisher><publisher-name>Institute of Cytology and Genetics of Siberian Branch of the RAS</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18699/VJ21.015</article-id><article-id custom-type="elpub" pub-id-type="custom">vavilov-2925</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>БИОТЕХНОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOTECHNOLOGY</subject></subj-group></article-categories><title-group><article-title>Продукция субтилизиновых протеаз в бактериях и дрожжах</article-title><trans-title-group xml:lang="en"><trans-title>Production of subtilisin proteases in bacteria and yeast</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Розанов</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Rozanov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>лаборатория молекулярных биотехнологий</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Laboratory of Molecular Biotechnologies</p><p>Novosibirsk</p></bio><email xlink:type="simple">rozanov@bionet.nsc.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5604-5601</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шеховцов</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shekhovtsov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>лаборатория молекулярных биотехнологий</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Laboratory of Molecular Biotechnologies</p><p>Novosibirsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Богачева</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bogacheva</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>лаборатория молекулярных биотехнологий</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Laboratory of Molecular Biotechnologies</p><p>Novosibirsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2658-7906</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Першина</surname><given-names>Е. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Pershina</surname><given-names>E. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>лаборатория молекулярных биотехнологий</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Laboratory of Molecular Biotechnologies</p><p>Novosibirsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ряполова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryapolova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>с. Малобыково, Белгородская область</p></bio><bio xml:lang="en"><p>Malobykovo village, Belgorod region</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бытяк</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Bytyak</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>с. Малобыково, Белгородская область</p></bio><bio xml:lang="en"><p>Malobykovo village, Belgorod region</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3524-0456</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пельтек</surname><given-names>С. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Peltek</surname><given-names>S. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>лаборатория молекулярных биотехнологий</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Laboratory of Molecular Biotechnologies</p><p>Novosibirsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Курчатовский геномный центр Института цитологии и генетики Сибирского отделения Российской академии наук; Федеральный исследовательский центр Институт цитологии и генетики Сибирского отделения Российской академии наук<country>Россия</country></aff><aff xml:lang="en">Kurchatov Genomic Center of the Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences; Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Инновационный центр «Бирюч-НТ»<country>Россия</country></aff><aff xml:lang="en">Innovation Centre “Biruch-NT”<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>15</day><month>03</month><year>2021</year></pub-date><volume>25</volume><issue>1</issue><fpage>125</fpage><lpage>134</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Розанов А.С., Шеховцов С.В., Богачева Н.В., Першина Е.Г., Ряполова А.В., Бытяк Д.С., Пельтек С.Е., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Розанов А.С., Шеховцов С.В., Богачева Н.В., Першина Е.Г., Ряполова А.В., Бытяк Д.С., Пельтек С.Е.</copyright-holder><copyright-holder xml:lang="en">Rozanov A.S., Shekhovtsov S.V., Bogacheva N.V., Pershina E.G., Ryapolova A.V., Bytyak D.S., Peltek S.E.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vavilov.elpub.ru/jour/article/view/2925">https://vavilov.elpub.ru/jour/article/view/2925</self-uri><abstract><p>В настоящей работе мы рассматриваем прогресс в изучении и модификации субтилизиновых протеаз. Несмотря на длительное время применения микробиальных протеаз и значительное число работ, посвященных их исследованию, поиск новых генов протеаз, создание продуцентов и развитие методов их применения остаются актуальными, о чем говорит высокий уровень цитирования публикаций, описывающих протеазы и их продуценты. На данный класс ферментов приходится максимальный объем производства промышленных белков в мире, что объясняет большой интерес к нему. Это говорит о чрезвычайно высокой важности получения собственных технологий их производства. В статье представлены сведения о классификации субтилизинов, истории их открытия и дальнейших работ по оптимизации их свойств. Дан обзор классов субтилизиновых протеаз и родственных им ферментов. Проанализированы проблемы поиска и отбора субтилаз из природных штаммов различных микроорганизмов, пути и особенности их модификации и используемые при этом методы генетической инженерии. Детально изучены методы оптимизации продукции промышленных субтилаз у различных штаммов, касающихся важнейших аспектов культивирования: состава среды, времени культивирования, влияния температуры и pH. Приводятся результаты последних исследований по техникам культивирования – глубинному и твердофазному культивированию. На основании рассмотренных литературных данных можно заключить, что в настоящее время практически не применяются нативные, т. е. обнаруженные в природе ферменты, в связи с решающими преимуществами, предоставляемыми белками, модифицированными при помощи генной инженерии и обладающими улучшенными свойствами: термостабильностью, общей устойчивостью к детергентам и специфической – к различным окислителям, высокой активностью в разных диапазонах температур, независимостью от ионов, стабильностью в отсутствие кальция и т. д. Большинство субтилизиновых протеаз синтезируется в штаммах-продуцентах, относящихся к разным видам рода Bacillus. В то же время ведутся работы по адаптации синтеза этих ферментов в других микроорганизмах, в частности дрожжей Pichia pastoris.</p></abstract><trans-abstract xml:lang="en"><p>In this review, we discuss the progress in the study and modif ication of subtilisin proteases. Despite longstanding applications of microbial proteases and a large number of research papers, the search for new protease genes, the construction of producer strains, and the development of methods for their practical application are still relevant and important, judging by the number of citations of the research articles on proteases and their microbial producers. This enzyme class represents the largest share of the industrial production of proteins worldwide. This situation can explain the high level of interest in these enzymes and points to the high importance of designing domestic technologies for their manufacture. The review covers subtilisin classif ication, the history of their discovery, and subsequent research on the optimization of their properties. An overview of the classes of subtilisin proteases and related enzymes is provided too. There is a discussion about the problems with the search for (and selection of) subtilases from natural strains of various microorganisms, approaches to (and specifics of) their modif ication, as well as the relevant genetic engineering techniques. Details are provided on the methods for expression optimization of industrial subtilases of various strains: the details of the most important parameters of cultivation, i. e., composition of the media, culture duration, and the inf luence of temperature and pH. Also presented are the results of the latest studies on cultivation techniques: submerged and solid-state fermentation. From the literature data reviewed, we can conclude that native enzymes (i. e., those obtained from natural sources) currently hardly have any practical applications because of the decisive advantages of the enzymes modified by genetic engineering and having better properties: e. g., thermal stability, general resistance to detergents and specif ic resistance to various oxidants, high activity in various temperature ranges, independence from metal ions, and stability in the absence of calcium. The vast majority of subtilisin proteases are expressed in producer strains belonging to different species of the genus Bacillus. Meanwhile, there is an effort to adapt the expression of these enzymes to other microbes, in particular species of the yeast Pichia pastoris.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>субтилизин</kwd><kwd>субтилаза</kwd><kwd>протеаза</kwd><kwd>щелочная сериновая протеаза</kwd><kwd>Pichia pastoris</kwd><kwd>Bacillus subtilis</kwd><kwd>биотехнология</kwd><kwd>генетическая инженерия</kwd><kwd>культивирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>subtilisin</kwd><kwd>subtilase</kwd><kwd>protease</kwd><kwd>alkaline serine protease</kwd><kwd>Pichia pastoris</kwd><kwd>Bacillus subtilis</kwd><kwd>biotechnology</kwd><kwd>genetic engineering</kwd><kwd>cultivation</kwd></kwd-group><funding-group xml:lang="en"><funding-statement>The study was supported by the budget project No. 0259-2019-0005. This work was done within the framework of State Assignment Kurchatov Genomic Center of the Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences (075-15-2019-1662).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Abidi F., Limam F., Nejib M.M. Production of alkaline proteases by Botrytis cinerea using economic raw materials: Assay as biodetergent. Process Biochem. 2008;43(11):1202-1208. DOI 10.1016/j.procbio.2008.06.018.</mixed-citation><mixed-citation xml:lang="en">Abidi F., Limam F., Nejib M.M. Production of alkaline proteases by Botrytis cinerea using economic raw materials: Assay as biodetergent. Process Biochem. 2008;43(11):1202-1208. DOI 10.1016/j.procbio.2008.06.018.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Abusham R.A., Rahman R.N.Z.R.A., Salleh A., Basri M. Optimization of physical factors affecting the production of thermo-stable organic solvent-tolerant protease from a newly isolated halo tolerant Bacillus subtilis strain Rand. Microb. Cell Fact. 2009;8(1):20. DOI 10.1186/1475-2859-8-20.</mixed-citation><mixed-citation xml:lang="en">Abusham R.A., Rahman R.N.Z.R.A., Salleh A., Basri M. Optimization of physical factors affecting the production of thermo-stable organic solvent-tolerant protease from a newly isolated halo tolerant Bacillus subtilis strain Rand. Microb. Cell Fact. 2009;8(1):20. DOI 10.1186/1475-2859-8-20.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Anandharaj M., Sivasankari B., Siddharthan N., Rani R.P., Sivakumar S. Production, purification, and biochemical characterization of thermostable metallo-protease from novel Bacillus alkalitelluris TWI3 isolated from tannery waste. Appl. Biochem. Biotechnol. 2016;178(8):1666-1686. DOI 10.1007/s12010-015-1974-7.</mixed-citation><mixed-citation xml:lang="en">Anandharaj M., Sivasankari B., Siddharthan N., Rani R.P., Sivakumar S. Production, purification, and biochemical characterization of thermostable metallo-protease from novel Bacillus alkalitelluris TWI3 isolated from tannery waste. Appl. Biochem. Biotechnol. 2016;178(8):1666-1686. DOI 10.1007/s12010-015-1974-7.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Ashraf N.M., Krishnagopal A., Hussain A., Kastner D., Sayed A.M.M., Mok Y.-K., Swaminathan K., Zeeshan N. Engineering of serine protease for improved thermostability and catalytic activity using rational design. Int. J. Biol. Macromol. 2019;126:229-237. DOI 10.1016/j.ijbiomac.2018.12.218.</mixed-citation><mixed-citation xml:lang="en">Ashraf N.M., Krishnagopal A., Hussain A., Kastner D., Sayed A.M.M., Mok Y.-K., Swaminathan K., Zeeshan N. Engineering of serine protease for improved thermostability and catalytic activity using rational design. Int. J. Biol. Macromol. 2019;126:229-237. DOI 10.1016/j.ijbiomac.2018.12.218.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Asokan S., Jayanthi C. Alkaline protease production by Bacillus licheniformis and Bacillus coagulans. J. Cell Tissue Res. 2010;10(1): 2119-2123.</mixed-citation><mixed-citation xml:lang="en">Asokan S., Jayanthi C. Alkaline protease production by Bacillus licheniformis and Bacillus coagulans. J. Cell Tissue Res. 2010;10(1): 2119-2123.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Barrett A.J., McDonald J.K. Nomenclature: protease, proteinase and peptidase. Biochem. J. 1986;237(3):935. DOI 10.1042/bj2370935.</mixed-citation><mixed-citation xml:lang="en">Barrett A.J., McDonald J.K. Nomenclature: protease, proteinase and peptidase. Biochem. J. 1986;237(3):935. DOI 10.1042/bj2370935.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Betzel C., Klupsch S., Papendorf G., Hastrup S., Branner S., Wilson K.S. Crystal structure of the alkaline proteinase Savinase ™ from Bacillus lentus at 1.4 Å resolution. J. Mol. Biol. 1992;223(2):427-445. DOI 10.1016/0022-2836(92)90662-4.</mixed-citation><mixed-citation xml:lang="en">Betzel C., Klupsch S., Papendorf G., Hastrup S., Branner S., Wilson K.S. Crystal structure of the alkaline proteinase Savinase ™ from Bacillus lentus at 1.4 Å resolution. J. Mol. Biol. 1992;223(2):427-445. DOI 10.1016/0022-2836(92)90662-4.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Bhaskar N., Sudeepa E.S., Rashmi H.N., Tamil Selvi A. Partial purification and characterization of protease of Bacillus proteolyticus CFR3001 isolated from fish processing waste and its antibacterial activities. Bioresour. Technol. 2007;98(14):2758-2764. DOI 10.1016/j.biortech.2006.09.033.</mixed-citation><mixed-citation xml:lang="en">Bhaskar N., Sudeepa E.S., Rashmi H.N., Tamil Selvi A. Partial purification and characterization of protease of Bacillus proteolyticus CFR3001 isolated from fish processing waste and its antibacterial activities. Bioresour. Technol. 2007;98(14):2758-2764. DOI 10.1016/j.biortech.2006.09.033.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Bode W., Papamokos E., Musil D. The high-resolution X-ray crystal structure of the complex formed between subtilisin Carlsberg and eglin c, an elastase inhibitor from the leech Hirudo medicinalis. Structural analysis, subtilisin structure and interface geometry. Eur. J. Biochem. 1987;166(3):673-692. DOI 10.1111/j.1432-1033.1987.tb13566.x.</mixed-citation><mixed-citation xml:lang="en">Bode W., Papamokos E., Musil D. The high-resolution X-ray crystal structure of the complex formed between subtilisin Carlsberg and eglin c, an elastase inhibitor from the leech Hirudo medicinalis. Structural analysis, subtilisin structure and interface geometry. Eur. J. Biochem. 1987;166(3):673-692. DOI 10.1111/j.1432-1033.1987.tb13566.x.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Cheng S.-W., Hu H.-M., Shen S.-W., Takagi H., Asano M., Tsai Y.-C. Production and characterization of keratinase of a feather-degrading Bacillus licheniformis PWD-1. Biosci. Biotechnol. Biochem. 1995; 59(12):2239-2243. DOI 10.1271/bbb.59.2239.</mixed-citation><mixed-citation xml:lang="en">Cheng S.-W., Hu H.-M., Shen S.-W., Takagi H., Asano M., Tsai Y.-C. Production and characterization of keratinase of a feather-degrading Bacillus licheniformis PWD-1. Biosci. Biotechnol. Biochem. 1995; 59(12):2239-2243. DOI 10.1271/bbb.59.2239.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Cho S.J. Primary structure and characterization of a protease from Bacillus amyloliquefaciens isolated from meju, a traditional Korean soybean fermentation starter. Process Biochem. 2019;80:52-57. DOI 10.1016/j.procbio.2019.02.011.</mixed-citation><mixed-citation xml:lang="en">Cho S.J. Primary structure and characterization of a protease from Bacillus amyloliquefaciens isolated from meju, a traditional Korean soybean fermentation starter. Process Biochem. 2019;80:52-57. DOI 10.1016/j.procbio.2019.02.011.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Chu W.H. Optimization of extracellular alkaline protease production from species of Bacillus. J. Ind. Microbiol. Biotechnol. 2007; 34(3):241-245. DOI 10.1007/s10295-006-0192-2.</mixed-citation><mixed-citation xml:lang="en">Chu W.H. Optimization of extracellular alkaline protease production from species of Bacillus. J. Ind. Microbiol. Biotechnol. 2007; 34(3):241-245. DOI 10.1007/s10295-006-0192-2.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Dodia M.S., Joshi R.H., Patel R.K., Singh S.P. Characterization and stability of extracellular alkaline proteases from halophilic and alkaliphilic bacteria isolated from saline habitat of coastal Gujarat, India. Braz. J. Microbiol. 2006;37(3):276-282. DOI 10.1590/S1517-83822006000300015.</mixed-citation><mixed-citation xml:lang="en">Dodia M.S., Joshi R.H., Patel R.K., Singh S.P. Characterization and stability of extracellular alkaline proteases from halophilic and alkaliphilic bacteria isolated from saline habitat of coastal Gujarat, India. Braz. J. Microbiol. 2006;37(3):276-282. DOI 10.1590/S1517-83822006000300015.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Garcia-Carreno F.L., Navarrete Del Toro M.A. Classification of proteases without tears. Biochem. Educ. 1997;25(3):161-167. DOI 10.1016/S0307-4412(97)00005-8.</mixed-citation><mixed-citation xml:lang="en">Garcia-Carreno F.L., Navarrete Del Toro M.A. Classification of proteases without tears. Biochem. Educ. 1997;25(3):161-167. DOI 10.1016/S0307-4412(97)00005-8.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Genov N., Filippi B., Dolashka P., Wilson K.S., Betzel C. Stability of subtilisins and related proteinases (subtilases). Int. J. Pept. Protein Res. 1995;45(4):391-400. DOI 10.1111/j.1399-3011.1995.tb01054.x.</mixed-citation><mixed-citation xml:lang="en">Genov N., Filippi B., Dolashka P., Wilson K.S., Betzel C. Stability of subtilisins and related proteinases (subtilases). Int. J. Pept. Protein Res. 1995;45(4):391-400. DOI 10.1111/j.1399-3011.1995.tb01054.x.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Gessesse A., Hatti-Kaul R., Gashe B.A., Mattiasson B. Novel alkaline proteases from alkaliphilic bacteria grown on chicken feather. Enzyme Microb. Technol. 2003;32(5):519-524. DOI 10.1016/S0141-0229(02)00324-1.</mixed-citation><mixed-citation xml:lang="en">Gessesse A., Hatti-Kaul R., Gashe B.A., Mattiasson B. Novel alkaline proteases from alkaliphilic bacteria grown on chicken feather. Enzyme Microb. Technol. 2003;32(5):519-524. DOI 10.1016/S0141-0229(02)00324-1.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Gong B.L., Mao R.Q., Xiao Y., Jia M.L., Zhong X.L., Liu Y., Xu P.-L., Li G. Improvement of enzyme activity and soluble expression of an alkaline protease isolated from oil-polluted mud flat metagenome by random mutagenesis. Enzyme Microb. Technol. 2017;106:97-105. DOI 10.1016/j.enzmictec.2017.06.015.</mixed-citation><mixed-citation xml:lang="en">Gong B.L., Mao R.Q., Xiao Y., Jia M.L., Zhong X.L., Liu Y., Xu P.-L., Li G. Improvement of enzyme activity and soluble expression of an alkaline protease isolated from oil-polluted mud flat metagenome by random mutagenesis. Enzyme Microb. Technol. 2017;106:97-105. DOI 10.1016/j.enzmictec.2017.06.015.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Gouda M.K. Optimization and purification of alkaline proteases produced by marine Bacillus sp. MIG newly isolated from eastern harbour of Alexandria. Pol. J. Microbiol. 2006;55(2):119-126.</mixed-citation><mixed-citation xml:lang="en">Gouda M.K. Optimization and purification of alkaline proteases produced by marine Bacillus sp. MIG newly isolated from eastern harbour of Alexandria. Pol. J. Microbiol. 2006;55(2):119-126.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Gulmez C., Atakisi O., Dalginli K.Y., Atakisi E. A novel detergent additive: Organic solvent- and thermo-alkaline-stable recombinant subtilisin. Int. J. Biol. Macromol. 2019;108:436-443. 2018; 108: 436-443. https://doi.org/10.1016/j.ijbiomac.2017.11.133.</mixed-citation><mixed-citation xml:lang="en">Gulmez C., Atakisi O., Dalginli K.Y., Atakisi E. A novel detergent additive: Organic solvent- and thermo-alkaline-stable recombinant subtilisin. Int. J. Biol. Macromol. 2019;108:436-443. 2018; 108: 436-443. https://doi.org/10.1016/j.ijbiomac.2017.11.133.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Gupta A., Joseph B., Mani A., Thomas G. Biosynthesis and properties of an extracellular thermostable serine alkaline protease from Virgibacillus pantothenticus. World J. Microbiol. Biotechnol. 2008; 24(2):237-243. https://doi.org/10.1007/s11274-007-9462-z.</mixed-citation><mixed-citation xml:lang="en">Gupta A., Joseph B., Mani A., Thomas G. Biosynthesis and properties of an extracellular thermostable serine alkaline protease from Virgibacillus pantothenticus. World J. Microbiol. Biotechnol. 2008; 24(2):237-243. https://doi.org/10.1007/s11274-007-9462-z.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Gupta A., Khare S.K. Enhanced production and characterization of a solvent stable protease from solvent tolerant Pseudomonas aeruginosa PseA. Enzyme Microb. Technol. 2007;42(1):11-16. DOI 10.1016/j.enzmictec.2007.07.019.</mixed-citation><mixed-citation xml:lang="en">Gupta A., Khare S.K. Enhanced production and characterization of a solvent stable protease from solvent tolerant Pseudomonas aeruginosa PseA. Enzyme Microb. Technol. 2007;42(1):11-16. DOI 10.1016/j.enzmictec.2007.07.019.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Hadjidj R., Badis A., Mechri S., Eddouaouda K., Khelouia L., Annane R., Hattab M.E., Jaouadi B. Purification, biochemical, and molecular characterization of novel protease from Bacillus licheniformis strain K7A. Int. J. Biol. Macromol. 2018;114:1033-1048. DOI 10.1016/j.ijbiomac.2018.03.167.</mixed-citation><mixed-citation xml:lang="en">Hadjidj R., Badis A., Mechri S., Eddouaouda K., Khelouia L., Annane R., Hattab M.E., Jaouadi B. Purification, biochemical, and molecular characterization of novel protease from Bacillus licheniformis strain K7A. Int. J. Biol. Macromol. 2018;114:1033-1048. DOI 10.1016/j.ijbiomac.2018.03.167.</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Harwood C.R., Cranenburgh R. Bacillus protein secretion: an unfolding story. Trends Microbiol. 2008;16(2):73-79. DOI 10.1016/j.tim.2007.12.001.</mixed-citation><mixed-citation xml:lang="en">Harwood C.R., Cranenburgh R. Bacillus protein secretion: an unfolding story. Trends Microbiol. 2008;16(2):73-79. DOI 10.1016/j.tim.2007.12.001.</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Hu H., Gao J., He J., Yu B., Zheng P., Huang Z., Mau X., Yu J., Han G., Chen D. Codon optimization significantly improves the expression level of a keratinase gene in Pichia pastoris. PLoS One. 2013; 8(3):e58393. https://doi.org/10.1371/journal.pone.0058393.</mixed-citation><mixed-citation xml:lang="en">Hu H., Gao J., He J., Yu B., Zheng P., Huang Z., Mau X., Yu J., Han G., Chen D. Codon optimization significantly improves the expression level of a keratinase gene in Pichia pastoris. PLoS One. 2013; 8(3):e58393. https://doi.org/10.1371/journal.pone.0058393.</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Huang R., Yang Q., Feng H. Single amino acid mutation alters thermostability of the alkaline protease from Bacillus pumilus: Thermodynamics and temperature dependence. Acta Biochim. Biophys. Sin. 2015;47(2):98-105. DOI 10.1093/abbs/gmu120.</mixed-citation><mixed-citation xml:lang="en">Huang R., Yang Q., Feng H. Single amino acid mutation alters thermostability of the alkaline protease from Bacillus pumilus: Thermodynamics and temperature dependence. Acta Biochim. Biophys. Sin. 2015;47(2):98-105. DOI 10.1093/abbs/gmu120.</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">Ikemura H., Takagi H., Inouye M. Requirement of pro-sequence for the production of active subtilisin E in Escherichia coli. J. Biol. Chem. 1987;262(16):7859-7864.</mixed-citation><mixed-citation xml:lang="en">Ikemura H., Takagi H., Inouye M. Requirement of pro-sequence for the production of active subtilisin E in Escherichia coli. J. Biol. Chem. 1987;262(16):7859-7864.</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">Ikram-Ul-haq H.M., Umber H. Production of protease by Penicillium chrysogenum through optimization of environmental conditions. J. Agric. Soc. Sci. 2006;2(1):23-25.</mixed-citation><mixed-citation xml:lang="en">Ikram-Ul-haq H.M., Umber H. Production of protease by Penicillium chrysogenum through optimization of environmental conditions. J. Agric. Soc. Sci. 2006;2(1):23-25.</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">Jaouadi B., Aghajari N., Haser R., Bejar S. Enhancement of the thermostability and the catalytic efficiency of Bacillus pumilus CBS protease by site-directed mutagenesis. Biochimie. 2010;92(4):360-369. DOI 10.1016/j.biochi.2010.01.008.</mixed-citation><mixed-citation xml:lang="en">Jaouadi B., Aghajari N., Haser R., Bejar S. Enhancement of the thermostability and the catalytic efficiency of Bacillus pumilus CBS protease by site-directed mutagenesis. Biochimie. 2010;92(4):360-369. DOI 10.1016/j.biochi.2010.01.008.</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">Jaouadi N.Z., Jaouadi B., Hlima H.B., Rekik H., Belhoul M., Hmidi M., Bejar S. Probing the crucial role of Leu31 and Thr33 of the Bacillus pumilus CBS alkaline protease in substrate recognition and enzymatic depilation of animal hide. PLoS One. 2014;9(9). DOI 10.1371/journal.pone.0108367.</mixed-citation><mixed-citation xml:lang="en">Jaouadi N.Z., Jaouadi B., Hlima H.B., Rekik H., Belhoul M., Hmidi M., Bejar S. Probing the crucial role of Leu31 and Thr33 of the Bacillus pumilus CBS alkaline protease in substrate recognition and enzymatic depilation of animal hide. PLoS One. 2014;9(9). DOI 10.1371/journal.pone.0108367.</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">Jaswal R.K., Kocher G.S., Virk M.S. Production of alkaline protease by Bacillus circulans using agricultural residues: A statistical approach. Ind. J. Biotechnol. (IJBT). 2008;7(3):356-360.</mixed-citation><mixed-citation xml:lang="en">Jaswal R.K., Kocher G.S., Virk M.S. Production of alkaline protease by Bacillus circulans using agricultural residues: A statistical approach. Ind. J. Biotechnol. (IJBT). 2008;7(3):356-360.</mixed-citation></citation-alternatives></ref><ref id="cit31"><label>31</label><citation-alternatives><mixed-citation xml:lang="ru">Jeong Y.J., Baek S.C., Kim H. Cloning and characterization of a novel intracellular serine protease (IspK) from Bacillus megaterium with a potential additive for detergents. Int. J. Biol. Macromol. 2018;108: 808-816. DOI 10.1016/j.ijbiomac.2017.10.173.</mixed-citation><mixed-citation xml:lang="en">Jeong Y.J., Baek S.C., Kim H. Cloning and characterization of a novel intracellular serine protease (IspK) from Bacillus megaterium with a potential additive for detergents. Int. J. Biol. Macromol. 2018;108: 808-816. DOI 10.1016/j.ijbiomac.2017.10.173.</mixed-citation></citation-alternatives></ref><ref id="cit32"><label>32</label><citation-alternatives><mixed-citation xml:lang="ru">Kalwasińska A., Jankiewicz U., Felföldi T., Burkowska-But A., Brzezinska M.S. Alkaline and halophilic protease production by Bacillus luteus H11 and its potential industrial applications. Food Technol. Biotechnol. 2018;56(4):553-561. DOI 10.17113/ftb.56.04.18.5553.</mixed-citation><mixed-citation xml:lang="en">Kalwasińska A., Jankiewicz U., Felföldi T., Burkowska-But A., Brzezinska M.S. Alkaline and halophilic protease production by Bacillus luteus H11 and its potential industrial applications. Food Technol. Biotechnol. 2018;56(4):553-561. DOI 10.17113/ftb.56.04.18.5553.</mixed-citation></citation-alternatives></ref><ref id="cit33"><label>33</label><citation-alternatives><mixed-citation xml:lang="ru">Ke Y., Yuan X.M., Li J.S., Zhou W., Huang X.H., Wang T. High-level expression, purification, and enzymatic characterization of a recombinant Aspergillus sojae alkaline protease in Pichia pastoris. Protein Expr. Purif. 2018;148:24-29. DOI 10.1016/j.pep.2018.03.009.</mixed-citation><mixed-citation xml:lang="en">Ke Y., Yuan X.M., Li J.S., Zhou W., Huang X.H., Wang T. High-level expression, purification, and enzymatic characterization of a recombinant Aspergillus sojae alkaline protease in Pichia pastoris. Protein Expr. Purif. 2018;148:24-29. DOI 10.1016/j.pep.2018.03.009.</mixed-citation></citation-alternatives></ref><ref id="cit34"><label>34</label><citation-alternatives><mixed-citation xml:lang="ru">Kebabcı Ö., Cihangir N. Isolation of protease producing novel Bacillus cereus and detection of optimal conditions. Afr. J. Biotechnol. 2010; 10(7):1160-1164. DOI 10.5897/AJB10.164.</mixed-citation><mixed-citation xml:lang="en">Kebabcı Ö., Cihangir N. Isolation of protease producing novel Bacillus cereus and detection of optimal conditions. Afr. J. Biotechnol. 2010; 10(7):1160-1164. DOI 10.5897/AJB10.164.</mixed-citation></citation-alternatives></ref><ref id="cit35"><label>35</label><citation-alternatives><mixed-citation xml:lang="ru">Khosravi-Darani K., Falahatpishe H.R., Jalali M. Alkaline protease production on date waste by an alkalophilic Bacillus sp. 2-5 isolated from soil. Afr. J. Biotechnol. 2008;7(10):1536-1542.</mixed-citation><mixed-citation xml:lang="en">Khosravi-Darani K., Falahatpishe H.R., Jalali M. Alkaline protease production on date waste by an alkalophilic Bacillus sp. 2-5 isolated from soil. Afr. J. Biotechnol. 2008;7(10):1536-1542.</mixed-citation></citation-alternatives></ref><ref id="cit36"><label>36</label><citation-alternatives><mixed-citation xml:lang="ru">Kobayashi T., Hakamada Y., Adachi S., Hitomi J., Yoshimatsu T., Koike K., Ito S. Purification and properties of an alkaline protease from alkalophilic Bacillus sp. KSM-K16. Appl. Microbiol. Biotechnol. 1995;43(3):473-481. DOI 10.1007/BF00218452.</mixed-citation><mixed-citation xml:lang="en">Kobayashi T., Hakamada Y., Adachi S., Hitomi J., Yoshimatsu T., Koike K., Ito S. Purification and properties of an alkaline protease from alkalophilic Bacillus sp. KSM-K16. Appl. Microbiol. Biotechnol. 1995;43(3):473-481. DOI 10.1007/BF00218452.</mixed-citation></citation-alternatives></ref><ref id="cit37"><label>37</label><citation-alternatives><mixed-citation xml:lang="ru">Kobayashi T., Lu J., Li Z., Hung V.S., Kurata A., Hatada Y., Takai K., Ito S., Horikoshi K. Extremely high alkaline protease from a deepsubsurface bacterium, Alkaliphilus transvaalensis. Appl. Microbiol. Biotechnol. 2007;75(1):71-80. DOI 10.1007/s00253-006-0800-0.</mixed-citation><mixed-citation xml:lang="en">Kobayashi T., Lu J., Li Z., Hung V.S., Kurata A., Hatada Y., Takai K., Ito S., Horikoshi K. Extremely high alkaline protease from a deepsubsurface bacterium, Alkaliphilus transvaalensis. Appl. Microbiol. Biotechnol. 2007;75(1):71-80. DOI 10.1007/s00253-006-0800-0.</mixed-citation></citation-alternatives></ref><ref id="cit38"><label>38</label><citation-alternatives><mixed-citation xml:lang="ru">Kumar C.G., Joo H.S., Koo Y.M., Paik S.R., Chang C.S. Thermostable alkaline protease from a novel marine haloalkalophilic Bacillus clausii isolate. World J. Microbiol. Biotechnol. 2004;20(4):351-357. DOI 10.1023/B:WIBI.0000033057.28828.a7.</mixed-citation><mixed-citation xml:lang="en">Kumar C.G., Joo H.S., Koo Y.M., Paik S.R., Chang C.S. Thermostable alkaline protease from a novel marine haloalkalophilic Bacillus clausii isolate. World J. Microbiol. Biotechnol. 2004;20(4):351-357. DOI 10.1023/B:WIBI.0000033057.28828.a7.</mixed-citation></citation-alternatives></ref><ref id="cit39"><label>39</label><citation-alternatives><mixed-citation xml:lang="ru">Latiffi A.A., Salleh A.B., Rahman R.N.Z.R.A., Oslan S.N., Basri M. Secretory expression of thermostable alkaline protease from Bacillus stearothermophilus FI by using native signal peptide and α-factor secretion signal in Pichia pastoris. Genes Genet. Syst. 2013; 88(2):85-91. DOI 10.1266/ggs.88.85.</mixed-citation><mixed-citation xml:lang="en">Latiffi A.A., Salleh A.B., Rahman R.N.Z.R.A., Oslan S.N., Basri M. Secretory expression of thermostable alkaline protease from Bacillus stearothermophilus FI by using native signal peptide and α-factor secretion signal in Pichia pastoris. Genes Genet. Syst. 2013; 88(2):85-91. DOI 10.1266/ggs.88.85.</mixed-citation></citation-alternatives></ref><ref id="cit40"><label>40</label><citation-alternatives><mixed-citation xml:lang="ru">Lin H.H., Yin L.J., Jiang S.T. Functional expression and characterization of keratinase from Pseudomonas aeruginosa in Pichia pastoris. J. Agric. Food Chem. 2009;57(12):5321-5325. DOI 10.1021/jf900417t.</mixed-citation><mixed-citation xml:lang="en">Lin H.H., Yin L.J., Jiang S.T. Functional expression and characterization of keratinase from Pseudomonas aeruginosa in Pichia pastoris. J. Agric. Food Chem. 2009;57(12):5321-5325. DOI 10.1021/jf900417t.</mixed-citation></citation-alternatives></ref><ref id="cit41"><label>41</label><citation-alternatives><mixed-citation xml:lang="ru">Liu B., Zhang J., Gu L., Du G., Chen J., Liao X. Comparative analysis of bacterial expression systems for keratinase production. Appl. Biochem. Biotechnol. 2014;173(5):1222-1235. DOI 10.1007/s12010-014-0925-z.</mixed-citation><mixed-citation xml:lang="en">Liu B., Zhang J., Gu L., Du G., Chen J., Liao X. Comparative analysis of bacterial expression systems for keratinase production. Appl. Biochem. Biotechnol. 2014;173(5):1222-1235. DOI 10.1007/s12010-014-0925-z.</mixed-citation></citation-alternatives></ref><ref id="cit42"><label>42</label><citation-alternatives><mixed-citation xml:lang="ru">Liu Y., Zhang T., Zhang Z., Sun T., Wang J., Lu F. Improvement of cold adaptation of Bacillus alcalophilus alkaline protease by directed evolution. J. Mol. Catalys. B: Enzymatic. 2014;106:117-123. DOI 10.1016/j.molcatb.2014.05.005.</mixed-citation><mixed-citation xml:lang="en">Liu Y., Zhang T., Zhang Z., Sun T., Wang J., Lu F. Improvement of cold adaptation of Bacillus alcalophilus alkaline protease by directed evolution. J. Mol. Catalys. B: Enzymatic. 2014;106:117-123. DOI 10.1016/j.molcatb.2014.05.005.</mixed-citation></citation-alternatives></ref><ref id="cit43"><label>43</label><citation-alternatives><mixed-citation xml:lang="ru">Mathew C.D., Gunathilaka R.M.S. Production, purification and characterization of a thermostable alkaline serine protease from Bacillus lichniformis NMS-1. Int. J. Biotechnol. Mol. Biol. Res. 2015;6(3): 19-27. DOI 10.5897/IJBMBR2014.0199.</mixed-citation><mixed-citation xml:lang="en">Mathew C.D., Gunathilaka R.M.S. Production, purification and characterization of a thermostable alkaline serine protease from Bacillus lichniformis NMS-1. Int. J. Biotechnol. Mol. Biol. Res. 2015;6(3): 19-27. DOI 10.5897/IJBMBR2014.0199.</mixed-citation></citation-alternatives></ref><ref id="cit44"><label>44</label><citation-alternatives><mixed-citation xml:lang="ru">Mehta V.J., Thumar J.T., Singh S.P. Production of alkaline protease from an alkaliphilic actinomycete. Bioresour. Technol. 2006;97(14): 1650-1654. DOI 10.1016/j.biortech.2005.07.023.</mixed-citation><mixed-citation xml:lang="en">Mehta V.J., Thumar J.T., Singh S.P. Production of alkaline protease from an alkaliphilic actinomycete. Bioresour. Technol. 2006;97(14): 1650-1654. DOI 10.1016/j.biortech.2005.07.023.</mixed-citation></citation-alternatives></ref><ref id="cit45"><label>45</label><citation-alternatives><mixed-citation xml:lang="ru">Mothe T., Sultanpuram V.R. Production, purification and characterization of a thermotolerant alkaline serine protease from a novel species Bacillus caseinilyticus. 3 Biotech. 2016;6(1):1-10. DOI 10.1007/s13205-016-0377-y.</mixed-citation><mixed-citation xml:lang="en">Mothe T., Sultanpuram V.R. Production, purification and characterization of a thermotolerant alkaline serine protease from a novel species Bacillus caseinilyticus. 3 Biotech. 2016;6(1):1-10. DOI 10.1007/s13205-016-0377-y.</mixed-citation></citation-alternatives></ref><ref id="cit46"><label>46</label><citation-alternatives><mixed-citation xml:lang="ru">Nejad Z., Yaghmaei S., Hosseini R. Production of extracellular protease and determination of optimal condition by Bacillus licheniformis BBRC 100053. Chem. Eng. Trans. 2010;1(3):1447-1452. DOI 10.3303/CET1021242.</mixed-citation><mixed-citation xml:lang="en">Nejad Z., Yaghmaei S., Hosseini R. Production of extracellular protease and determination of optimal condition by Bacillus licheniformis BBRC 100053. Chem. Eng. Trans. 2010;1(3):1447-1452. DOI 10.3303/CET1021242.</mixed-citation></citation-alternatives></ref><ref id="cit47"><label>47</label><citation-alternatives><mixed-citation xml:lang="ru">Okuda M., Sumitomo N., Takimura Y., Ogawa A., Saeki K., Kawai S., Kobayashi T., Ito S. A new subtilisin family: Nucleotide and deduced amino acid sequences of new high-molecular-mass alkaline proteases from Bacillus spp. Extremophiles. 2004;8(3):229-235. DOI 10.1007/s00792-004-0381-8.</mixed-citation><mixed-citation xml:lang="en">Okuda M., Sumitomo N., Takimura Y., Ogawa A., Saeki K., Kawai S., Kobayashi T., Ito S. A new subtilisin family: Nucleotide and deduced amino acid sequences of new high-molecular-mass alkaline proteases from Bacillus spp. Extremophiles. 2004;8(3):229-235. DOI 10.1007/s00792-004-0381-8.</mixed-citation></citation-alternatives></ref><ref id="cit48"><label>48</label><citation-alternatives><mixed-citation xml:lang="ru">Olajuyigbe F.M., Ajele J.O., Ajele J.O. Production dynamics of extracellular protease from Bacillus species. Afr. J. Biotechnol. 2005; 4(8):776-779.</mixed-citation><mixed-citation xml:lang="en">Olajuyigbe F.M., Ajele J.O., Ajele J.O. Production dynamics of extracellular protease from Bacillus species. Afr. J. Biotechnol. 2005; 4(8):776-779.</mixed-citation></citation-alternatives></ref><ref id="cit49"><label>49</label><citation-alternatives><mixed-citation xml:lang="ru">Ottesen M., Svendsen I. The Subtilisins. In: Methods in Enzymology. Academic Press, 1970;19:199-215. DOI 10.1016/0076-6879(70)19014-8.</mixed-citation><mixed-citation xml:lang="en">Ottesen M., Svendsen I. The Subtilisins. In: Methods in Enzymology. Academic Press, 1970;19:199-215. DOI 10.1016/0076-6879(70)19014-8.</mixed-citation></citation-alternatives></ref><ref id="cit50"><label>50</label><citation-alternatives><mixed-citation xml:lang="ru">Porres J.M., Benito M.J., Lei X.G. Functional expression of keratinase (kerA) gene from Bacillus licheniformis in Pichia pastoris. Biotechnol. Lett. 2002;24(8):631-636. DOI 10.1023/A:1015083007746.</mixed-citation><mixed-citation xml:lang="en">Porres J.M., Benito M.J., Lei X.G. Functional expression of keratinase (kerA) gene from Bacillus licheniformis in Pichia pastoris. Biotechnol. Lett. 2002;24(8):631-636. DOI 10.1023/A:1015083007746.</mixed-citation></citation-alternatives></ref><ref id="cit51"><label>51</label><citation-alternatives><mixed-citation xml:lang="ru">Prakasham R.S., Rao C.S., Sarma P.N. Green gram husk-an inexpensive substrate for alkaline protease production by Bacillus sp. in solid-state fermentation. Bioresour. Technol. 2006;97(13):1449-1454. DOI 10.1016/j.biortech.2005.07.015.</mixed-citation><mixed-citation xml:lang="en">Prakasham R.S., Rao C.S., Sarma P.N. Green gram husk-an inexpensive substrate for alkaline protease production by Bacillus sp. in solid-state fermentation. Bioresour. Technol. 2006;97(13):1449-1454. DOI 10.1016/j.biortech.2005.07.015.</mixed-citation></citation-alternatives></ref><ref id="cit52"><label>52</label><citation-alternatives><mixed-citation xml:lang="ru">Radha S., Gunasekaran P. Purification and characterization of keratinase from recombinant Pichia and Bacillus strains. Protein Expr. Purif. 2009;64(1):24-31. DOI 10.1016/j.pep.2008.10.008.</mixed-citation><mixed-citation xml:lang="en">Radha S., Gunasekaran P. Purification and characterization of keratinase from recombinant Pichia and Bacillus strains. Protein Expr. Purif. 2009;64(1):24-31. DOI 10.1016/j.pep.2008.10.008.</mixed-citation></citation-alternatives></ref><ref id="cit53"><label>53</label><citation-alternatives><mixed-citation xml:lang="ru">Rawlings N.D., Waller M., Barrett A.J., Bateman A. MEROPS: The database of proteolytic enzymes, their substrates and inhibitors. Nucleic Acids Res. 2014;42(D1):D503-D509. DOI 10.1093/nar/gkt953.</mixed-citation><mixed-citation xml:lang="en">Rawlings N.D., Waller M., Barrett A.J., Bateman A. MEROPS: The database of proteolytic enzymes, their substrates and inhibitors. Nucleic Acids Res. 2014;42(D1):D503-D509. DOI 10.1093/nar/gkt953.</mixed-citation></citation-alternatives></ref><ref id="cit54"><label>54</label><citation-alternatives><mixed-citation xml:lang="ru">Rehman R., Ahmed M., Siddique A., Hasan F., Hameed A., Jamal A. Catalytic role of thermostable metalloproteases from Bacillus subtilis KT004404 as dehairing and destaining agent. Appl. Biochem. Biotechnol. 2017;181(1):434-450. DOI 10.1007/s12010-016-2222-5.</mixed-citation><mixed-citation xml:lang="en">Rehman R., Ahmed M., Siddique A., Hasan F., Hameed A., Jamal A. Catalytic role of thermostable metalloproteases from Bacillus subtilis KT004404 as dehairing and destaining agent. Appl. Biochem. Biotechnol. 2017;181(1):434-450. DOI 10.1007/s12010-016-2222-5.</mixed-citation></citation-alternatives></ref><ref id="cit55"><label>55</label><citation-alternatives><mixed-citation xml:lang="ru">Shafee N., Aris S., Rahman R., Basri M., Salleh A. Optimization of environmental and nutritional conditions for the production of alkaline protease by a newly isolated bacterium Bacillus cereus strain 146. J. Appl. Sci. Res. 2005;1(1):1-8.</mixed-citation><mixed-citation xml:lang="en">Shafee N., Aris S., Rahman R., Basri M., Salleh A. Optimization of environmental and nutritional conditions for the production of alkaline protease by a newly isolated bacterium Bacillus cereus strain 146. J. Appl. Sci. Res. 2005;1(1):1-8.</mixed-citation></citation-alternatives></ref><ref id="cit56"><label>56</label><citation-alternatives><mixed-citation xml:lang="ru">Shaheen M., Shah A., Hameed A., Hasan F. Influence of culture conditions on production and activity of protease from Bacillus subtilis BS1. Pak. J. Bot. 2008;40(5):2161-2169.</mixed-citation><mixed-citation xml:lang="en">Shaheen M., Shah A., Hameed A., Hasan F. Influence of culture conditions on production and activity of protease from Bacillus subtilis BS1. Pak. J. Bot. 2008;40(5):2161-2169.</mixed-citation></citation-alternatives></ref><ref id="cit57"><label>57</label><citation-alternatives><mixed-citation xml:lang="ru">Sharma A., Sharma V., Saxena J., Yadav B., Alam A., Prakash A. Optimization of protease production from bacteria isolated from soil. Appl. Res. J. 2015;1(7):388-394.</mixed-citation><mixed-citation xml:lang="en">Sharma A., Sharma V., Saxena J., Yadav B., Alam A., Prakash A. Optimization of protease production from bacteria isolated from soil. Appl. Res. J. 2015;1(7):388-394.</mixed-citation></citation-alternatives></ref><ref id="cit58"><label>58</label><citation-alternatives><mixed-citation xml:lang="ru">Sharma K., Kumar R., Vats S., Gupta A. Production, partial purification and characterization of alkaline protease from Bacillus aryabhattai K3. Int. J. Adv. Pharm. Biol. Chem. 2014;3(2):290-298.</mixed-citation><mixed-citation xml:lang="en">Sharma K., Kumar R., Vats S., Gupta A. Production, partial purification and characterization of alkaline protease from Bacillus aryabhattai K3. Int. J. Adv. Pharm. Biol. Chem. 2014;3(2):290-298.</mixed-citation></citation-alternatives></ref><ref id="cit59"><label>59</label><citation-alternatives><mixed-citation xml:lang="ru">Sharma K.M., Kumar R., Panwar S., Kumar A. Microbial alkaline proteases: Optimization of production parameters and their properties. J. Genet. Eng. Biotechnol. 2017;15:115-126. DOI 10.1016/j.jgeb.2017.02.001.</mixed-citation><mixed-citation xml:lang="en">Sharma K.M., Kumar R., Panwar S., Kumar A. Microbial alkaline proteases: Optimization of production parameters and their properties. J. Genet. Eng. Biotechnol. 2017;15:115-126. DOI 10.1016/j.jgeb.2017.02.001.</mixed-citation></citation-alternatives></ref><ref id="cit60"><label>60</label><citation-alternatives><mixed-citation xml:lang="ru">Sharmin S., Hossain T., Anwar M. Isolation and characterization of a protease producing bacteria Bacillus amovivorus and optimization of some factors of culture conditions for protease production. J. Biol. Sci. 2005;5(3):358-362. DOI 10.3923/jbs.2005.358.362.</mixed-citation><mixed-citation xml:lang="en">Sharmin S., Hossain T., Anwar M. Isolation and characterization of a protease producing bacteria Bacillus amovivorus and optimization of some factors of culture conditions for protease production. J. Biol. Sci. 2005;5(3):358-362. DOI 10.3923/jbs.2005.358.362.</mixed-citation></citation-alternatives></ref><ref id="cit61"><label>61</label><citation-alternatives><mixed-citation xml:lang="ru">Shih J. Construction of bacillus licheniformis t1 strain and fermentation production of crude enzyme extract therefrom. Patent No. US20050032188A1, 2005.</mixed-citation><mixed-citation xml:lang="en">Shih J. Construction of bacillus licheniformis t1 strain and fermentation production of crude enzyme extract therefrom. Patent No. US20050032188A1, 2005.</mixed-citation></citation-alternatives></ref><ref id="cit62"><label>62</label><citation-alternatives><mixed-citation xml:lang="ru">Shikha, Sharan A., Darmwal N.S. Improved production of alkaline protease from a mutant of alkalophilic Bacillus pantotheneticus using molasses as a substrate. Bioresour. Technol. 2007;98(4):881-885. DOI 10.1016/j.biortech.2006.03.023.</mixed-citation><mixed-citation xml:lang="en">Shikha, Sharan A., Darmwal N.S. Improved production of alkaline protease from a mutant of alkalophilic Bacillus pantotheneticus using molasses as a substrate. Bioresour. Technol. 2007;98(4):881-885. DOI 10.1016/j.biortech.2006.03.023.</mixed-citation></citation-alternatives></ref><ref id="cit63"><label>63</label><citation-alternatives><mixed-citation xml:lang="ru">Shivanand P., Jayaraman G. Production of extracellular protease from halotolerant bacterium, Bacillus aquimaris strain VITP4 isolated from Kumta coast. Process Biochem. 2009;44(10):1088-1094. DOI 10.1016/j.procbio.2009.05.010.</mixed-citation><mixed-citation xml:lang="en">Shivanand P., Jayaraman G. Production of extracellular protease from halotolerant bacterium, Bacillus aquimaris strain VITP4 isolated from Kumta coast. Process Biochem. 2009;44(10):1088-1094. DOI 10.1016/j.procbio.2009.05.010.</mixed-citation></citation-alternatives></ref><ref id="cit64"><label>64</label><citation-alternatives><mixed-citation xml:lang="ru">Shivasharana C.T., Naik G.R. Ecofriendly applications of thermostable alkaline protease produced from a Bacillus sp. JB-99 under solid state fermentation. Int. J. Environ. Sci. 2012;3(3):956-964. DOI 10.6088/ijes.2012030133003.</mixed-citation><mixed-citation xml:lang="en">Shivasharana C.T., Naik G.R. Ecofriendly applications of thermostable alkaline protease produced from a Bacillus sp. JB-99 under solid state fermentation. Int. J. Environ. Sci. 2012;3(3):956-964. DOI 10.6088/ijes.2012030133003.</mixed-citation></citation-alternatives></ref><ref id="cit65"><label>65</label><citation-alternatives><mixed-citation xml:lang="ru">Shu M., Shen W., Yang S., Wang X., Wang F., Wang Y., Ma L. High-level expression and characterization of a novel serine protease in Pichia pastoris by multi-copy integration. Enzyme Microb. Technol. 2016;92:56-66. DOI.10.1016/j.enzmictec.2016.06.007.</mixed-citation><mixed-citation xml:lang="en">Shu M., Shen W., Yang S., Wang X., Wang F., Wang Y., Ma L. High-level expression and characterization of a novel serine protease in Pichia pastoris by multi-copy integration. Enzyme Microb. Technol. 2016;92:56-66. DOI.10.1016/j.enzmictec.2016.06.007.</mixed-citation></citation-alternatives></ref><ref id="cit66"><label>66</label><citation-alternatives><mixed-citation xml:lang="ru">Singh S.K., Tripathi V.R., Jain R.K., Vikram S., Garg S.K. An antibiotic, heavy metal resistant and halotolerant Bacillus cereus SIU1 and its thermoalkaline protease. Microb. Cell Fact. 2010;9(1):59. DOI 10.1186/1475-2859-9-59.</mixed-citation><mixed-citation xml:lang="en">Singh S.K., Tripathi V.R., Jain R.K., Vikram S., Garg S.K. An antibiotic, heavy metal resistant and halotolerant Bacillus cereus SIU1 and its thermoalkaline protease. Microb. Cell Fact. 2010;9(1):59. DOI 10.1186/1475-2859-9-59.</mixed-citation></citation-alternatives></ref><ref id="cit67"><label>67</label><citation-alternatives><mixed-citation xml:lang="ru">Smith E.L., Markland F.S., Kasper C.B., DeLange R.J., Landon M., Evans W.H. The complete amino acid sequence of two types of subtilisin, BPN’ and Carlsberg. J. Biol. Chem. 1966;241(24):5974-5976.</mixed-citation><mixed-citation xml:lang="en">Smith E.L., Markland F.S., Kasper C.B., DeLange R.J., Landon M., Evans W.H. The complete amino acid sequence of two types of subtilisin, BPN’ and Carlsberg. J. Biol. Chem. 1966;241(24):5974-5976.</mixed-citation></citation-alternatives></ref><ref id="cit68"><label>68</label><citation-alternatives><mixed-citation xml:lang="ru">Srinivasan T., Das S., Balakrishnan V., Philip R., Kannan N. Isolation and characterization of thermostable protease producing bacteria from tannery industry effluent. Recent Res. Sci. Technol. 2009;1(2): 63-66.</mixed-citation><mixed-citation xml:lang="en">Srinivasan T., Das S., Balakrishnan V., Philip R., Kannan N. Isolation and characterization of thermostable protease producing bacteria from tannery industry effluent. Recent Res. Sci. Technol. 2009;1(2): 63-66.</mixed-citation></citation-alternatives></ref><ref id="cit69"><label>69</label><citation-alternatives><mixed-citation xml:lang="ru">Srinubabu G., Lokeswari N., Jayaraju K. Screening of nutritional parameters for the production of protease from Aspergillus oryzae. Electr. J. Chem. 2007;4(2):208-215. DOI 10.1155/2007/915432.</mixed-citation><mixed-citation xml:lang="en">Srinubabu G., Lokeswari N., Jayaraju K. Screening of nutritional parameters for the production of protease from Aspergillus oryzae. Electr. J. Chem. 2007;4(2):208-215. DOI 10.1155/2007/915432.</mixed-citation></citation-alternatives></ref><ref id="cit70"><label>70</label><citation-alternatives><mixed-citation xml:lang="ru">Strausberg S.L., Ruan B., Fisher K.E., Alexander P.A., Bryan P.N. Directed coevolution of stability and catalytic activity in calciumfree subtilisin. Biochemistry. 2005;44(9):3272-3279. DOI 10.1021/bi047806m.</mixed-citation><mixed-citation xml:lang="en">Strausberg S.L., Ruan B., Fisher K.E., Alexander P.A., Bryan P.N. Directed coevolution of stability and catalytic activity in calciumfree subtilisin. Biochemistry. 2005;44(9):3272-3279. DOI 10.1021/bi047806m.</mixed-citation></citation-alternatives></ref><ref id="cit71"><label>71</label><citation-alternatives><mixed-citation xml:lang="ru">Takenaka S., Yoshinami J., Kuntiya A., Techapun C., Leksawasdi N., Seesuriyachan P., Chaiyaso I., Watanabe M., Tanaka K., Yoshida K. Characterization and mutation analysis of a halotolerant serine protease from a new isolate of Bacillus subtilis. Biotechnol. Lett. 2018; 40(1):189-196. DOI 10.1007/s10529-017-2459-2.</mixed-citation><mixed-citation xml:lang="en">Takenaka S., Yoshinami J., Kuntiya A., Techapun C., Leksawasdi N., Seesuriyachan P., Chaiyaso I., Watanabe M., Tanaka K., Yoshida K. Characterization and mutation analysis of a halotolerant serine protease from a new isolate of Bacillus subtilis. Biotechnol. Lett. 2018; 40(1):189-196. DOI 10.1007/s10529-017-2459-2.</mixed-citation></citation-alternatives></ref><ref id="cit72"><label>72</label><citation-alternatives><mixed-citation xml:lang="ru">Thys R.C.S., Guzzon S.O., Cladera-Olivera F., Brandelli A. Optimization of protease production by Microbacterium sp. in feather meal using response surface methodology. Process Biochem. 2006; 41(1):67-73. DOI 10.1016/j.procbio.2005.03.070.</mixed-citation><mixed-citation xml:lang="en">Thys R.C.S., Guzzon S.O., Cladera-Olivera F., Brandelli A. Optimization of protease production by Microbacterium sp. in feather meal using response surface methodology. Process Biochem. 2006; 41(1):67-73. DOI 10.1016/j.procbio.2005.03.070.</mixed-citation></citation-alternatives></ref><ref id="cit73"><label>73</label><citation-alternatives><mixed-citation xml:lang="ru">Tufvesson P., Lima-Ramos J., Nordblad M., Woodley J.M. Guidelines and cost analysis for catalyst production in biocatalytic processes. Org. Process Res. Dev. 2010;15(1):266-274. DOI 10.1021/op1002165.</mixed-citation><mixed-citation xml:lang="en">Tufvesson P., Lima-Ramos J., Nordblad M., Woodley J.M. Guidelines and cost analysis for catalyst production in biocatalytic processes. Org. Process Res. Dev. 2010;15(1):266-274. DOI 10.1021/op1002165.</mixed-citation></citation-alternatives></ref><ref id="cit74"><label>74</label><citation-alternatives><mixed-citation xml:lang="ru">Usharani B., Muthuraj M. Production and characterization of protease enzyme from Bacillus laterosporus. Afr. J. Microbiol. Res. 2010; 4(11):1057-1063.</mixed-citation><mixed-citation xml:lang="en">Usharani B., Muthuraj M. Production and characterization of protease enzyme from Bacillus laterosporus. Afr. J. Microbiol. Res. 2010; 4(11):1057-1063.</mixed-citation></citation-alternatives></ref><ref id="cit75"><label>75</label><citation-alternatives><mixed-citation xml:lang="ru">Vaithanomsat P., Malapant T., Apiwattanapiwat W. Silk degumming solution as substrate for microbial protease production. Nat. Sci. 2008;42:543-551.</mixed-citation><mixed-citation xml:lang="en">Vaithanomsat P., Malapant T., Apiwattanapiwat W. Silk degumming solution as substrate for microbial protease production. Nat. Sci. 2008;42:543-551.</mixed-citation></citation-alternatives></ref><ref id="cit76"><label>76</label><citation-alternatives><mixed-citation xml:lang="ru">Voordouw G., Milo C., Roche R.S. Role of bound calcium ions in thermostable, proteolytic enzymes. Separation of intrinsic and calcium ion contributions to the kinetic thermal stability. Biochemistry. 1976;15(17):3716-3724. DOI 10.1021/bi00662a012.</mixed-citation><mixed-citation xml:lang="en">Voordouw G., Milo C., Roche R.S. Role of bound calcium ions in thermostable, proteolytic enzymes. Separation of intrinsic and calcium ion contributions to the kinetic thermal stability. Biochemistry. 1976;15(17):3716-3724. DOI 10.1021/bi00662a012.</mixed-citation></citation-alternatives></ref><ref id="cit77"><label>77</label><citation-alternatives><mixed-citation xml:lang="ru">Zambare V., Nilegaonkar S., Kanekar P. A novel extracellular protease from Pseudomonas aeruginosa MCM B-327: enzyme production and its partial characterization. New Biotechnol. 2011;28(2): 173-181. DOI 10.1016/j.nbt.2010.10.002.</mixed-citation><mixed-citation xml:lang="en">Zambare V., Nilegaonkar S., Kanekar P. A novel extracellular protease from Pseudomonas aeruginosa MCM B-327: enzyme production and its partial characterization. New Biotechnol. 2011;28(2): 173-181. DOI 10.1016/j.nbt.2010.10.002.</mixed-citation></citation-alternatives></ref><ref id="cit78"><label>78</label><citation-alternatives><mixed-citation xml:lang="ru">Zhao H.Y., Feng H. Engineering Bacillus pumilus alkaline serine protease to increase its low-temperature proteolytic activity by directed evolution. BMC Biotechnol. 2018;18(1):34. DOI 10.1186/s12896-018-0451-0.</mixed-citation><mixed-citation xml:lang="en">Zhao H.Y., Feng H. Engineering Bacillus pumilus alkaline serine protease to increase its low-temperature proteolytic activity by directed evolution. BMC Biotechnol. 2018;18(1):34. DOI 10.1186/s12896-018-0451-0.</mixed-citation></citation-alternatives></ref><ref id="cit79"><label>79</label><citation-alternatives><mixed-citation xml:lang="ru">Zhao H.Y., Wu L.Y., Liu G., Feng H. Single-site substitutions improve cold activity and increase thermostability of the dehairing alkaline protease (DHAP). Biosci. Biotechnol. Biochem. 2016;80(12):2480-2485. DOI 10.1080/09168451.2016.1230005.</mixed-citation><mixed-citation xml:lang="en">Zhao H.Y., Wu L.Y., Liu G., Feng H. Single-site substitutions improve cold activity and increase thermostability of the dehairing alkaline protease (DHAP). Biosci. Biotechnol. Biochem. 2016;80(12):2480-2485. DOI 10.1080/09168451.2016.1230005.</mixed-citation></citation-alternatives></ref><ref id="cit80"><label>80</label><citation-alternatives><mixed-citation xml:lang="ru">Zhou K., Dong Y., Zheng H., Chen B., Mao R., Zhou L., Wang Y. Expression, fermentation, purification and lyophilisation of recombinant Subtilisin QK in Pichia pastoris. Process Biochem. 2017; 54:1-8. DOI 10.1016/j.procbio.2016.12.028.</mixed-citation><mixed-citation xml:lang="en">Zhou K., Dong Y., Zheng H., Chen B., Mao R., Zhou L., Wang Y. Expression, fermentation, purification and lyophilisation of recombinant Subtilisin QK in Pichia pastoris. Process Biochem. 2017; 54:1-8. DOI 10.1016/j.procbio.2016.12.028.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
