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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">vestim</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной  академии наук Беларуси. Серия медицинских наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Medical series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1814-6023</issn><issn pub-type="epub">2524-2350</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1814-6023-2021-18-1-46-57</article-id><article-id custom-type="elpub" pub-id-type="custom">vestim-732</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>КЛИНИЧЕСКАЯ И ЭКСПЕРИМЕНТАЛЬНАЯ МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL AND EXPERIMENTAL MEDICINE</subject></subj-group></article-categories><title-group><article-title>Сайты связывания билирубина сывороточным альбумином человека: возможность влияния на них мутаций, вызванных радиацией</article-title><trans-title-group xml:lang="en"><trans-title>Influence of mutations caused by radiation exposure on the bilirubin binding sites of human serum albumin</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>Побойнев</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Poboinev</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Побойнев Виктор Витольдович – аспирант, ассистент</p><p>пр. Дзержинского, 83, 220116, г. Минск, Республика Беларусь</p></bio><bio xml:lang="en"><p>Victor V. Poboinev – Postgraduate student, Assistant</p><p>83, Dzerzhynski Ave., 220116, Minsk, Republic of Belarus</p></bio><email xlink:type="simple">dremozzew@mail.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>Хрусталев</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Khrustalev</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хрусталев Владислав Викторович – доцент, заведующий кафедрой</p><p>пр. Дзержинского, 83, 220116, г. Минск, Республика Беларусь</p></bio><bio xml:lang="en"><p>Vladislav V. Khrustalev – Associate Professor, Head of the Department</p><p>83, Dzerzhynski Ave., 220116, Minsk, Republic of Belarus</p></bio><email xlink:type="simple">vvkhrustalev@mail.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>Стожаров</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Stojarov</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Стожаров Александр Николаевич – профессор, заведующий кафедрой</p><p>пр. Дзержинского, 83, 220116, г. Минск, Республика Беларусь</p></bio><bio xml:lang="en"><p>Aliaksandr N. Stojarov – Professor, Head of the Department</p><p>83, Dzerzhynski Ave., 220116, Minsk, Republic of Belarus</p></bio><email xlink:type="simple">stojarov@mail.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>Хрусталева</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khrustaleva</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хрусталева Татьяна Александровна – ст. науч. сотрудник</p><p>ул. Академическая, 28, 220072, г. Минск, Республика Беларусь</p></bio><bio xml:lang="en"><p>Tatyana A. Khrustaleva – Senior Researcher</p><p>28, Akademicheskaya Str., 220072, Minsk, Republic of Belarus</p></bio><email xlink:type="simple">tanissia.lir@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный медицинский университет</institution></aff><aff xml:lang="en"><institution>Belarusian State Medical University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт физиологии НАН Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Physiology of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>23</day><month>02</month><year>2021</year></pub-date><volume>18</volume><issue>1</issue><fpage>46</fpage><lpage>57</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Побойнев В.В., Хрусталев В.В., Стожаров А.Н., Хрусталева Т.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Побойнев В.В., Хрусталев В.В., Стожаров А.Н., Хрусталева Т.А.</copyright-holder><copyright-holder xml:lang="en">Poboinev V.V., Khrustalev V.V., Stojarov A.N., Khrustaleva T.A.</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://vestimed.belnauka.by/jour/article/view/732">https://vestimed.belnauka.by/jour/article/view/732</self-uri><abstract><p>В статье проанализированы сайты связывания билирубина сывороточным альбумином человека с точки зрения нестабильности вторичной структуры, а также изучено влияние известных аминокислотных замен, вызванных радиационным воздействием, на способность альбумина связывать билирубин. Расчеты энергии связывания и констант ингибирования комплексов билирубина с альбумином до и после аминокислотных замен показали, что аминокислотные замены по-разному влияют на способность связывать билирубин сывороточным альбумином человека. Аминокислотные замены Asp269-Gly269 (Nagasaki-1), Glu354-Lys354 (Hiroshima-1), Asp375-Asn375 (Nagasaki-2) уменьшают свободную энергию связывания билирубина сывороточным альбумином человека, а аминокислотные замены His3-Gln3 (Nagasaki-3) и Glu382-Lys382 (Hiroshima-2) повышают ее по результатам молекулярного докинга с соответствующими участками поверхности белка. Константы ингибирования при этом значительно выше, чем с известными сайтами связывания. В целом же рассмотренные мутации, вызванные радиационным воздействием, не могут влиять на наиболее специфичные известные сайты связывания билирубина сывороточным альбумином человека, так как аминокислотные остатки, которые подвергаются заменам, не взаимодействуют с аминокислотными остатками этих сайтов связывания (Leu115, Arg117, Phe134, Tyr138, Ile142, Phe149, Phe157, Tyr161, Arg186, Lys190, Lys240, Arg222). Все аминокислотные остатки известных сайтов связывания располагаются в стабильных элементах вторичной структуры сывороточного альбумина человека.</p><p>Полученные данные важны для понимая влияния радиационного воздействия на развитие билирубиновой энцефалопатии у жителей стран, пострадавших от аварии на Чернобыльской атомной электростанции, и у жителей Японии.</p></abstract><trans-abstract xml:lang="en"><p>In this article we analyze the bilirubin binding sites of human serum albumin from the point of view of the secondary structure instability, as well as the effect of amino acid substitutions caused by radiation exposure on the ability of albumin to bind bilirubin-IX-alpha. Based on calculations of binding energy and inhibition constants of bilirubin-albumin complexes before and after the amino acid substitutions, it was found that amino acid substitutions have different effects on the ability of human serum albumin to bind bilirubin. Amino acid substitutions Asp269-Gly269 (Nagasaki-1), Glu354-Lys354 (Hiroshima-1), Asp375-Asn375 (Nagasaki-2) reduce the binding free energy of bilirubin with human serum albumin, and the amino acid substitutions His3-Gln3 (Nagasaki-3) and Glu382-Lys382 (Hiroshima-2) increase it during molecular docking with the corresponding areas of the protein surface. The inhibition constants are significantly higher than with known binding sites. In general, mutations caused by radiation exposure cannot effect on bilirubin binding sites of human serum albumin, since the amino acid residues that are replaced do not interact with the amino acid residues from the binding sites (Leu115, Arg117, Phe134, Tyr138, Ile142, Phe149, Phe157, Tyr161, Arg186, Lys190, Lys240, Arg222). All amino acid residues from known binding sites are located in stable elements of the secondary structure of human serum albumin.</p><p>The data obtained are important for understanding the impact of radiation exposure on the development of bilirubin encephalopathy in the population of the Chernobyl region and Japan.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>сывороточный альбумин человека</kwd><kwd>билирубин</kwd><kwd>радиационное воздействие</kwd><kwd>аминокислотные замены</kwd><kwd>билирубиновая энцефалопатия</kwd><kwd>сайты связывания</kwd></kwd-group><kwd-group xml:lang="en"><kwd>human serum albumin</kwd><kwd>bilirubin</kwd><kwd>radiation exposure</kwd><kwd>amino acid substitutions</kwd><kwd>bilirubin encephalopathy</kwd><kwd>binding sites</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">Clinical indications for the albumin use: still a controversial issue / P. 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