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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Problems of Virology</journal-id><journal-title-group><journal-title xml:lang="en">Problems of Virology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы вирусологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0507-4088</issn><issn publication-format="electronic">2411-2097</issn><publisher><publisher-name xml:lang="en">Central Research Institute for Epidemiology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">11992</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">The maturation steps of human immunodeficiency virus and the role of proteolysis</article-title><trans-title-group xml:lang="ru"><trans-title>Ступени созревания вируса иммунодефицита человека и роль протеолиза</trans-title></trans-title-group></title-group><pub-date date-type="pub" iso-8601-date="2010-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2010</year></pub-date><volume>55</volume><issue>1</issue><issue-title xml:lang="en">NO1 (2010)</issue-title><issue-title xml:lang="ru">№1 (2010)</issue-title><fpage>10</fpage><lpage>15</lpage><history><date date-type="received" iso-8601-date="2023-06-09"><day>09</day><month>06</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2010, Bukrinskaya A.G., Grigoriev V.B., Korablina E.V., Guriev E.L., Vorkunova G.K.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2010, Букринская А.Г., Григорьев В.Б., Кораблина Е.В., Гурьев Е.Л., Воркунова Г.К.</copyright-statement><copyright-year>2010</copyright-year><copyright-holder xml:lang="en">Bukrinskaya A.G., Grigoriev V.B., Korablina E.V., Guriev E.L., Vorkunova G.K.</copyright-holder><copyright-holder xml:lang="ru">Букринская А.Г., Григорьев В.Б., Кораблина Е.В., Гурьев Е.Л., Воркунова Г.К.</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://virusjour.crie.ru/jour/article/view/11992">https://virusjour.crie.ru/jour/article/view/11992</self-uri><abstract xml:lang="en"><p>HIV-1 virions are as immature noninfectious particles lacking a central core. Shortly after budding, virions temporally mature and acquire cores and infectious activity. The cause of maturation remains poorly studied. We have revealed that the virions produced early after infection following 24-36 hours, never mature and remain noninfectious, and only virions produced 48-72 hours after infection mature. The mature virions contain 3 times more genomic viral RNA than "early" virus. The "early" virions contain the same proteolytically cleaved Gag proteins as mature virions in contrast to the accepted version. The virus protease inhibitor Indinavir sulfate (IS) fully blocks infectivity when added early after infection. The early proteolysis of Gag precursor in the infected cells and inclusion into the virions of cellularly cleaved matrix protein (cMA) are shown in the IS-treated cells. cMA is associated with genomic viral RNA.</p></abstract><trans-abstract xml:lang="ru"><p>Вирионы ВИЧ-1 почкуются как незрелые неинфекционные частицы, вскоре после почкования они "созревают" и приобретают сердцевину и инфекционную активность. Стадия созревания - наименее изученная в жизненном цикле ВИЧ-1. Мы выявили "ранний" вирус, продуцируемый через 24-36 ч после заражения клеток МТ4, который не созревает в отличие от вирионов отпочковавшихся через 48-72 ч, и содержит в 3 раза меньшее количество геномной вирусной РНК, чем зрелый вирус. Вопреки общепринятой версии в незрелом вирусе обнаружены такие же нарезанные Gag-белки, что и в зрелом вирусе. Ингибитор вирусной протеазы - индинавира сульфат (ИС) - полностью блокирует созревание вирионов при добавлении на раннем сроке после заражения. Помимо Gag-предшественника в зараженных клетках, обработанных ИС, обнаружен нарезанный в клетке матриксный белок, ассоциированный с геномной вирусной РНК.</p></trans-abstract><kwd-group xml:lang="en"><kwd>human immunodeficiency virus</kwd><kwd>infectious activity</kwd><kwd>maturation</kwd><kwd>viral proteins</kwd><kwd>viral cores</kwd><kwd>proteolysis</kwd><kwd>protease inhibitor</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>вирус иммунодефицита человека</kwd><kwd>инфекционная активность</kwd><kwd>созревание</kwd><kwd>вирусные белки</kwd><kwd>вирусные сердцевины</kwd><kwd>протеолиз</kwd><kwd>ингибитор протеазы</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Воркунова Г. К., Калнина Л. Б., Бурштейн М. Е. и др. 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