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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">10617</article-id><article-id pub-id-type="doi">10.32607/20758251-2012-4-4-65-72</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">Identification of Novel RNA-Protein Contact in Complex of Ribosomal Protein S7 and 3’-Terminal Fragment of 16S rRNA in E. coli</article-title><trans-title-group xml:lang="ru"><trans-title>Идентификация нового РНК-белкового контакта в комплексе рибосомного белка S7 с 3'-концевым фрагментом 16S рРНК Escherichia coli</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Golovin</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Головин</surname><given-names>A. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kopylov.alex@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khayrullina</surname><given-names>G. A.</given-names></name><name xml:lang="ru"><surname>Хайруллина</surname><given-names>Г. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kopylov.alex@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kraal</surname><given-names>B.</given-names></name><name xml:lang="ru"><surname>Крааль</surname><given-names>Б.</given-names></name></name-alternatives><address><country country="NL">Netherlands</country></address><email>kopylov.alex@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kopylov</surname><given-names>А. М.</given-names></name><name xml:lang="ru"><surname>Копылов</surname><given-names>А. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>kopylov.alex@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет им. М.В. Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Leiden Institute of Chemistry, Leiden University</institution></aff><aff><institution xml:lang="ru">Химический институт Лейденского университета</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2012-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2012</year></pub-date><volume>4</volume><issue>4</issue><issue-title xml:lang="en">VOL 4, NO4 (2012)</issue-title><issue-title xml:lang="ru">ТОМ 4, №4 (2012)</issue-title><fpage>65</fpage><lpage>72</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 ©; 2012, Golovin A.V., Khayrullina G.A., Kraal B., Kopylov А.М.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2012, Головин A.В., Хайруллина Г.A., Крааль Б., Копылов А.М.</copyright-statement><copyright-year>2012</copyright-year><copyright-holder xml:lang="en">Golovin A.V., Khayrullina G.A., Kraal B., Kopylov А.М.</copyright-holder><copyright-holder xml:lang="ru">Головин A.В., Хайруллина Г.A., Крааль Б., Копылов А.М.</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/10617">https://actanaturae.ru/2075-8251/article/view/10617</self-uri><abstract xml:lang="en"><p>For prokaryotes in vitro, 16S rRNA and 20 ribosomal proteins are capable of hierarchical self- assembly yielding a 30S ribosomal subunit. The self-assembly is initiated by interactions between 16S rRNA and three key ribosomal proteins: S4, S8, and S7. These proteins also have a regulatory function in the translation of their polycistronic operons recognizing a specific region of mRNA. Therefore, studying the RNA–protein interactions within binary complexes is obligatory for understanding ribosome biogenesis. The non-conventional RNA–protein contact within the binary complex of recombinant ribosomal protein S7 and its 16S rRNA binding site (236 nucleotides) was identified. UV–induced RNA–protein cross-links revealed that S7 cross-links to nucleotide U1321 of 16S rRNA. The careful consideration of the published RNA– protein cross-links for protein S7 within the 30S subunit and their correlation with the X-ray data for the 30S subunit have been performed. The RNA – protein cross–link within the binary complex identified in this study is not the same as the previously found cross-links for a subunit both in a solution, and in acrystal. The structure of the binary RNA–protein complex formed at the initial steps of self-assembly of the small subunit appears to be rearranged during the formation of the final structure of the subunit.</p></abstract><trans-abstract xml:lang="ru"><p>Cамосборка 30S малой субчастицы прокариотических рибосом in vitro из рРНК и 20 белков происходит иерархически и начинается взаимодействием 16S рРНК с тремя ключевыми белками: S4, S8 и S7. Эти же белки регулируют трансляцию своих оперонов, узнавая мРНК, поэтому изучение РНК-белковых взаимодействий в бинарных комплексах важно для понимания биогенеза рибосом. В представленной работе идентифицирован необычный рРНК-белковый контакт в бинарном комплексе рекомбинантного рибосом-ного белка S7 со своим участком связывания на фрагменте 16S рРНК Escherichia coli (236 нуклеотидов). Методом УФ-индуцируемых РНК-белковых сшивок показано, что белок S7 сшивается с нуклеотидом U1321 16S рРНК. Проведена аннотация опубликованных рРНК-белковых сшивок белка S7 в составе 30S субчастицы E. coli в растворе и данных рентгеноструктурного анализа 30S субчастицы. Сшивка, обнаруженная в бинарном комплексе, отличается от сшивок в целой субчастице в растворе, а также от контактов в структуре субчастицы в кристалле. По-видимому, структура бинарного рРНК-белкового комплекса, образующегося в начале сборки малой субчастицы, подвергается перегруппировке в процессе формирования целой субчастицы.</p></trans-abstract><kwd-group xml:lang="en"><kwd>ribosome</kwd><kwd>initiation</kwd><kwd>self-assembly</kwd><kwd>ribosomal protein S7</kwd><kwd>UV– induced cross-linking</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>рибосома</kwd><kwd>самосборка</kwd><kwd>рибосомный белок S7</kwd><kwd>УФ-индуцируемая сшивка</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by the German Academic Exchange Service (DAAD), the Russian Foundation for Basic Research (grant No. 11-04-01990-а), the Russian Foundation for Basic Research and the Netherlands Organization for Scientific Research (grants № 03-04-89001, 047.015.018).</funding-statement><funding-statement xml:lang="ru">Работа поддержана DААD, РФФИ (грант № 11-04-01990-а), РФФИ-НВО (гранты № 03-04-89001, 047.015.018).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Spirin A.S. // Ribosomes / Ed. 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