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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/VJGB-23-28</article-id><article-id custom-type="elpub" pub-id-type="custom">vavilov-3733</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>ГЕНЕТИКА ЧЕЛОВЕКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>HUMAN GENETICS</subject></subj-group></article-categories><title-group><article-title>Оценка роли отбора в эволюции митохондриальных геномов коренного населения Сибири</article-title><trans-title-group xml:lang="en"><trans-title>Evaluating the role of selection in the evolution of mitochondrial genomes of aboriginal peoples of Siberia</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0304-0652</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малярчук</surname><given-names>Б. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Malyarchuk</surname><given-names>B. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Магадан</p></bio><bio xml:lang="en"><p>Magadan</p></bio><email xlink:type="simple">malyarchuk@ibpn.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/0000-0002-1849-784X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Деренко</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Derenko</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Магадан</p></bio><bio xml:lang="en"><p>Magadan</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт биологических проблем Севера Дальневосточного отделения Российской академии наук<country>Россия</country></aff><aff xml:lang="en">Institute of Biological Problems of the North of the Far Eastern Branch of the Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>02</day><month>06</month><year>2023</year></pub-date><volume>27</volume><issue>3</issue><fpage>218</fpage><lpage>223</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Малярчук Б.А., Деренко М.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Малярчук Б.А., Деренко М.В.</copyright-holder><copyright-holder xml:lang="en">Malyarchuk B.A., Derenko M.V.</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/3733">https://vavilov.elpub.ru/jour/article/view/3733</self-uri><abstract><p>Исследования характера изменчивости митохондриальной ДНК (мтДНК) в популяциях человека вы­явили, что белок­кодирующие гены находятся под действием отрицательного (очищающего) отбора, поскольку мутационные спектры генов мтДНК характеризуются выраженным преобладанием синонимичных замен над несинонимичными (величина параметра Ka/Ks &lt; 1). Между тем в ряде исследований показано, что адаптация популяций к различным условиям природной среды может сопровождаться ослаблением отрицательного от­бора в некоторых генах мтДНК. Так, ранее было установлено, что в арктических популяциях отрицательный отбор ослаблен в митохондриальном гене ATP6, кодирующем одну из субъединиц АТФ­синтазы. В настоящей работе проведен Ka/Ks­анализ митохондриальных генов в больших выборках трех региональных групп населения Евразии: Сибири (N = 803), Западной Азии/Закавказья (N = 753) и Восточной Европы (N = 707). Основная цель работы – поиск следов адаптивной эволюции в генах мтДНК коренного населения Сибири, представлен­ного населением севера (коряки, эвены) и юга Сибири и прилегающей территории Северо­Восточного Китая (буряты, баргуты, хамнигане). С помощью стандартного Ka/Ks­анализа установлено, что все гены мтДНК во всех изученных региональных группах населения испытывают действие отрицательного отбора. Наиболее высокие значения Ka/Ks в различных региональных выборках обнаружены практически в одном и том же наборе генов, кодирующих субъединицы АТФ­синтазы (ATP6, ATP8), НАДН­дегидрогеназного комплекса (ND1, ND2, ND3) и ци­тохром bc1­комплекса (CYB). Самое высокое значение Ka/Ks, указывающее на ослабление отрицательного от­бора, выявлено в гене ATP6 в сибирской группе. Результаты анализа, выполненного с помощью метода FUBAR (пакет программ HyPhy) и направленного на поиск кодонов мтДНК, находящихся под действием отбора, также показали преобладание влияния отрицательного отбора над положительным отбором во всех группах населе­ния. В сибирских популяциях нуклеотидные позиции, находящиеcя под действием положительного отбора и ассоциированные с гаплогруппами мтДНК, зарегистрированы не на севере (что ожидается в предположении адаптивной эволюции мтДНК), а на юге Сибири.</p></abstract><trans-abstract xml:lang="en"><p>Studies of the nature of mitochondrial DNA (mtDNA) variability in human populations have shown that protein­coding genes are under negative (purifying) selection, since their mutation spectra are characterized by a pro­ nounced predominance of synonymous substitutions over non­synonymous ones (Ka/Ks &lt; 1). Meanwhile, a number of studies have shown that the adaptation of populations to various environmental conditions may be accompanied by a relaxation of negative selection in some mtDNA genes. For example, it was previously found that in Arctic populations, negative selection is relaxed in the mitochondrial ATP6 gene, which encodes one of the subunits of ATP synthase. In this work, we performed a Ka/Ks analysis of mitochondrial genes in large samples of three regional population groups in Eurasia: Siberia (N = 803), Western Asia/Transcaucasia (N = 753), and Eastern Europe (N = 707). The main goal of this work is to search for traces of adaptive evolution in the mtDNA genes of aboriginal peoples of Siberia represented by populations of the north (Koryaks, Evens) and the south of Siberia and the adjacent territory of Northeast China (Bu­ryats, Barghuts, Khamnigans). Using standard Ka/Ks analysis, it was found that all mtDNA genes in all studied regional population groups are subject to negative selection. The highest Ka/Ks values in different regional samples were found in almost the same set of genes encoding subunits of ATP synthase (ATP6, ATP8), NADH dehydrogenase complex (ND1, ND2, ND3), and cytochrome bc1 complex (CYB). The highest Ka/Ks value, indicating a relaxation of negative selection, was found in the ATP6 gene in the Siberian group. The results of the analysis performed using the FUBAR method (HyPhy software package) and aimed at searching for mtDNA codons under the influence of selection also showed the predominance of negative selection over positive selection in all population groups. In Siberian populations, nucleotide sites that are under positive selection and associated with mtDNA haplogroups were registered not in the north (which is expected under the assumption of adaptive evolution of mtDNA), but in the south of Siberia.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>митохондриальная ДНК</kwd><kwd>естественный отбор</kwd><kwd>Ka/Ks­тесты</kwd><kwd>популяции человека</kwd><kwd>Сибирь</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mitochondrial DNA</kwd><kwd>natural selection</kwd><kwd>Ka/Ks­testing</kwd><kwd>human populations</kwd><kwd>Siberia</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Brown W.M., George M.Jr., Wilson A.C. Rapid evolution of animal mitochondrial DNA. Proc. Natl. Acad. Sci. USA. 1979;76(4):19671971. DOI 10.1073/pnas.76.4.1967.</mixed-citation><mixed-citation xml:lang="en">Brown W.M., George M.Jr., Wilson A.C. 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