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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">vestnik-bio-msu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Московского университета. Серия 16. Биология</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik Moskovskogo universiteta. Seriya 16. Biologiya</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0137-0952</issn><publisher><publisher-name>Lomonosov Moscow State University,  School of Biology</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">vestnik-bio-msu-630</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>Молекулярная биология</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Molecular biology</subject></subj-group></article-categories><title-group><article-title>ОБРАТИМОСТЬ ИНДУЦИРОВАННЫХ ИОННОЙ СИЛОЙ СТРУКТУРНЫХ ПЕРЕСТРОЕК В МОНОНУКЛЕОСОМАХ</article-title><trans-title-group xml:lang="en"><trans-title>REVERSIBILITY OF STRUCTURAL REARRANGEMENTS IN MONONUCLEOSOMES INDUCED BY IONIC STRENGTH</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>Феофанов</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Feofanov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>докт. биол. наук, проф. кафедры биоинженерии биологического факультета, 119234, г. Москва, Ленинские горы, д. 1, стр. 12;</p><p>руководитель лаборатории оптической микроскопии и спектроскопии биомолекул, 117997, г. Москва, ул. Миклухо-Маклая, д. 16/10</p></bio><bio xml:lang="en"><p>Bioengineering Department, Biological Faculty, Leninskiye Gory 1–12, Moscow, 119234;</p><p>ul. Miklukho-Maklaya 16/10, 117997, Moscow</p></bio><email xlink:type="simple">avfeofanov@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Андреева</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Andreeva</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>студентка кафедры биоинженерии биологического факультета,</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12</p></bio><bio xml:lang="en"><p>Bioengineering Department, Biological Faculty, </p><p>Leninskiye Gory 1–12, Moscow, 119234</p></bio><email xlink:type="simple">tanyafromtver@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Студитский</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Studitsky</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>докт. биол. наук, гл. науч. сотр. кафедры биоинженерии биологического факультета, 119234, г. Москва, Ленинские горы, д. 1, стр. 12;</p><p>Cottman Avenue 333, Philadelphia, 19111 Pennsylvania, USA</p></bio><bio xml:lang="en"><p>Bioengineering Department, Biological Faculty, Leninskiye Gory 1–12, Moscow, 119234;</p><p>Cottman Avenue 333, Philadelphia, 19111 Pennsylvania, USA</p></bio><email xlink:type="simple">vasily.studitsky@fccc.edu</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кирпичников</surname><given-names>М. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Kirpichnikov</surname><given-names>M. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>акад. РАН, проф., докт. биол. наук, зав. кафедрой биоинженерии биологического факультета, 119234, г. Москва, Ленинские горы, д. 1, стр. 12;</p><p>зав. отделом биоинженерии ИБХ РАН, 117997, г. Москва, ул. Миклухо-Маклая, д. 16/10</p></bio><bio xml:lang="en"><p>Bioengineering Department, Biological Faculty, Leninskiye Gory 1–12, Moscow, 119234;</p><p>ul. Miklukho-Maklaya 16/10, 117997, Moscow</p></bio><email xlink:type="simple">kirpichnikov@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный университет имени М.В. Ломоносова;&#13;
Институт биоорганической химии имени академиков М.М. Шемякина и Ю.А. Овчинникова, РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University;&#13;
Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Московский государственный университет имени М.В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Московский государственный университет имени М.В. Ломоносова;&#13;
Fox Chase Cancer Center</institution><country>Соединённые Штаты Америки</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University;&#13;
Fox Chase Cancer Center</institution><country>United States</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>22</day><month>08</month><year>2018</year></pub-date><volume>73</volume><issue>3</issue><fpage>191</fpage><lpage>196</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Феофанов А.В., Андреева Т.В., Студитский В.М., Кирпичников М.П., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Феофанов А.В., Андреева Т.В., Студитский В.М., Кирпичников М.П.</copyright-holder><copyright-holder xml:lang="en">Feofanov A.V., Andreeva T.V., Studitsky V.M., Kirpichnikov M.P.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" 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://vestnik-bio-msu.elpub.ru/jour/article/view/630">https://vestnik-bio-msu.elpub.ru/jour/article/view/630</self-uri><abstract><p>Методом флуоресцентной микроскопии одиночных частиц с регистрацией фёрстеровского резонансного переноса энергии исследованы структурные перестройки, происходящие под действием высокой ионной силы в нуклеосомах на основе ДНК-матрицы 603. Установлено, что в диапазоне концентраций KCl 0,7–1,3 М в нуклеосомах происходят масштабные изменения структуры, сопровождающиеся образованием по меньшей мере двух состояний, отличающихся степенью отворачивания ДНК от октамера гистонов, и затрагивающие от 13 до 35 и более пар нуклеотидов. Доля нуклеосом с измененной структурой варьирует от 60% при 0,7 М KCl до 100% при 1,3 М KCl. Сохранение ассоциации между коровыми гистонами и ДНК в новых конформационных состояниях обеспечивает обратимость структурных изменений при снижении концентрации KCl до физиологического уровня. Обратимость достигает ~100% при переходе от 0,7 М к 0,15 М KCl и снижается до ~50% при переходе от 1,3 М к 0,15 М KCl.</p></abstract><trans-abstract xml:lang="en"><p>Using fluorescence microscopy of single particles with Förster resonance energy transfer recording, the structural rearrangements were studied that occurred in nucleosomes formed on the 603 DNA template at a high ionic strength. It is found that within the range of 0.7–1.3 M KCl, large-scale changes occur in the nucleosome structure that are accompanied by the formation of at least two states differing in the degree of DNA unwrapping from the histone octamer and affecting from 13 to 35 and more pairs of nucleotides. A fraction of nucleosomes with modified structure varies from 60% at 0.7 M KCl to 100% at 1.3 M KCl. Preservation of the association between core histones and DNA in the new conformational states ensures reversibility of structural changes when KCl concentration is reduced to a physiological level. Reversibility is ~100% after the transition from 0.7 M to 0.15 KCl and decreases to ~50% after the transition from 1.3 M to 0.15 KCl.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>хроматин</kwd><kwd>нуклеосома</kwd><kwd>ионная сила</kwd><kwd>флуоресценция</kwd><kwd>микроскопия</kwd><kwd>одиночная молекула</kwd></kwd-group><kwd-group xml:lang="en"><kwd>chromatin</kwd><kwd>nucleosome</kwd><kwd>ionic strength</kwd><kwd>fluorescence</kwd><kwd>microscopy</kwd><kwd>single molecule</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">РНФ</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">Thastrom A., Lowary P.T., Widlund H.R., Cao H., Kubista M., Widom J. Sequence motifs and free energies of selected natural and non-natural nucleosome positioning DNA sequences // J. Mol. Biol. 1999. Vol. 288. N 2. 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