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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">10483</article-id><article-id pub-id-type="doi">10.32607/20758251-2015-7-4-122-127</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Role of the Lipid Environment in the Dimerization of Transmembrane Domains of Glycophorin A</article-title><trans-title-group xml:lang="ru"><trans-title>Роль липидного окружения в процессе димеризации трансмембранных доменов гликофорина А</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kuznetsov</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Кузнецов</surname><given-names>A. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>r-efremov@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Volynsky</surname><given-names>P. E.</given-names></name><name xml:lang="ru"><surname>Волынский</surname><given-names>П. E.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>r-efremov@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Efremov</surname><given-names>R. G.</given-names></name><name xml:lang="ru"><surname>Ефремов</surname><given-names>Р. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>r-efremov@yandex.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">M.M. Shemyakin and Yu. A. Ovchinnikov Institute of Bioorganic Chemistry</institution></aff><aff><institution xml:lang="ru">Институт биоорганической химии им. академиков М.М. Шемякина и Ю.А. Овчинникова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Higher School of Economics</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский университет Высшая школа экономики</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Joint Supercomputer Center of Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Межведомственный суперкомпьютерный центр РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2015-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2015</year></pub-date><volume>7</volume><issue>4</issue><issue-title xml:lang="en">VOL 7, NO4 (2015)</issue-title><issue-title xml:lang="ru">ТОМ 7, №4 (2015)</issue-title><fpage>122</fpage><lpage>127</lpage><history><date date-type="received" iso-8601-date="2020-01-17"><day>17</day><month>01</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2015, Kuznetsov A.S., Volynsky P.E., Efremov R.G.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2015, Кузнецов A.С., Волынский П.E., Ефремов Р.Г.</copyright-statement><copyright-year>2015</copyright-year><copyright-holder xml:lang="en">Kuznetsov A.S., Volynsky P.E., Efremov R.G.</copyright-holder><copyright-holder xml:lang="ru">Кузнецов A.С., Волынский П.E., Ефремов Р.Г.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://actanaturae.ru/2075-8251/article/view/10483">https://actanaturae.ru/2075-8251/article/view/10483</self-uri><abstract xml:lang="en"><p>An efficient computational approach is developed to quantify the free energy of a spontaneous association of the α-helices of proteins in the membrane environment. The approach is based on the numerical decomposition of the free energy profiles of the transmembrane (TM) helices into components corresponding to protein-protein, protein-lipid, and protein-water interactions. The method was tested for the TM segments of human glycophorin A (GpA) and two mutant forms, Gly83Ala and Thr87Val. It was shown that lipids make a significant negative contribution to the free energy of dimerization, while amino acid residues forming the interface of the helix-helix contact may be unfavorable in terms of free energy. The detailed balance between different energy contributions is highly dependent on the amino acid sequence of the TM protein segment. The results show the dominant role of the environment in the interaction of membrane proteins that is changing our notion of the driving force behind the spontaneous association of TM α-helices. Adequate estimation of the contribution of the water-lipid environment thus becomes an extremely urgent task for a rational design of new molecules targeting bitopic membrane proteins, including receptor tyrosine kinases.</p></abstract><trans-abstract xml:lang="ru"><p>Разработан эффективный вычислительный подход к количественной оценке свободной энергии спонтанной ассоциации α-спиралей белков в мембранном окружении. В основе подхода - численное разложение профилей свободной энергии взаимодействия трансмембранных (ТМ) спиралей на компоненты, соответствующие взаимодействиям белок-белок, белок-липиды и белок-вода. Метод апробирован для ТМ-сегментов гликофорина А человека (GpA) и двух его мутантных форм Gly83Ala и Thr87Val. Показано, что липиды вносят значительный отрицательный вклад в свободную энергию димеризации, в то время как образующиеся на интерфейсе спираль-спираль контакты аминокислотных остатков могут быть невыгодными. Детальный баланс различных энергетических вкладов сильно зависит от аминокислотной последовательности ТМ-сегмента белка. Данные о доминирующей роли среды во взаимодействии мембранных белков меняют представления о движущей силе спонтанной ассоциации ТМ α-спиралей. Адекватная количественная оценка вклада водно-липидного окружения, таким образом, становится чрезвычайно актуальной при рациональном конструировании новых молекул, способных заданным образом модулировать работу битопных мембранных белков, включая рецепторные тирозинкиназы.</p></trans-abstract><kwd-group xml:lang="en"><kwd>transmembrane domain</kwd><kwd>glycophorin A</kwd><kwd>molecular dynamics</kwd><kwd>protein-protein interactions</kwd><kwd>role of the lipid membrane</kwd><kwd>free energy of intermolecular interactions</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>белок-белковые взаимодействия</kwd><kwd>гликофорин А</kwd><kwd>молекулярная динамика</kwd><kwd>роль липидной мембраны</kwd><kwd>свободная энергия межмолекулярных взаимодействий</kwd><kwd>трансмембранный домен</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by the Russian Science Foundation (grant No. 14-14-00871).</funding-statement><funding-statement xml:lang="ru">Работа выполнена при поддержке Российского научного фонда (грант № 14-14-00871).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Moreau A., Gosselin-Badaroudine P., Chahine M. // Q. 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