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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">27496</article-id><article-id pub-id-type="doi">10.32607/actanaturae.27496</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">Insights into the Functioning of the D-amino Acid Transaminase from <italic>Haliscomenobacter Hydrossis</italic> via a Structural and Spectral Analysis of its Complex with 3-Aminooxypropionic Acid</article-title><trans-title-group xml:lang="ru"><trans-title>Взаимодействие трансаминазы D-аминокислот из <italic>Haliscomenobacter hydrossis</italic> с 3-аминооксипропионовой кислотой: спектральный и структурный анализ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bakunova</surname><given-names>A. K.</given-names></name><name xml:lang="ru"><surname>Бакунова</surname><given-names>А. К.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>eubez@inbi.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Matyuta</surname><given-names>I. O.</given-names></name><name xml:lang="ru"><surname>Матюта</surname><given-names>И. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>eubez@inbi.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nikolaeva</surname><given-names>A. Yu.</given-names></name><name xml:lang="ru"><surname>Николаева</surname><given-names>А. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>eubez@inbi.ras.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Boyko</surname><given-names>K. M.</given-names></name><name xml:lang="ru"><surname>Бойко</surname><given-names>К. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>eubez@inbi.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khomutov</surname><given-names>A. R.</given-names></name><name xml:lang="ru"><surname>Хомутов</surname><given-names>А. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>eubez@inbi.ras.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4954-7547</contrib-id><name-alternatives><name xml:lang="en"><surname>Bezsudnova</surname><given-names>E. Yu.</given-names></name><name xml:lang="ru"><surname>Безсуднова</surname><given-names>Е. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p> </p>
<p> </p></bio><email>eubez@inbi.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0133-7962</contrib-id><name-alternatives><name xml:lang="en"><surname>Popov</surname><given-names>V. O.</given-names></name><name xml:lang="ru"><surname>Попов</surname><given-names>В. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>eubez@inbi.ras.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт биохимии имени А.Н. Баха, Федеральный исследовательский центр «Фундаментальные основы биотехнологии» РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">National Research Centre “Kurchatov Institute”</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский центр «Курчатовский институт»</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Engelhardt Institute of Molecular Biology, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт молекулярной биологии имени В.А. Энгельгардта РАН</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Department of Biology, Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова, биологический факультет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-11-12" publication-format="electronic"><day>12</day><month>11</month><year>2024</year></pub-date><volume>16</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>18</fpage><lpage>24</lpage><history><date date-type="received" iso-8601-date="2024-08-21"><day>21</day><month>08</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-09-19"><day>19</day><month>09</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Bakunova A.K., Matyuta I.O., Nikolaeva A.Y., Boyko K.M., Khomutov A.R., Bezsudnova E.Y., Popov V.O.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Бакунова А.К., Матюта И.О., Николаева А.Ю., Бойко К.М., Хомутов А.Р., Безсуднова Е.Ю., Попов В.О.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Bakunova A.K., Matyuta I.O., Nikolaeva A.Y., Boyko K.M., Khomutov A.R., Bezsudnova E.Y., Popov V.O.</copyright-holder><copyright-holder xml:lang="ru">Бакунова А.К., Матюта И.О., Николаева А.Ю., Бойко К.М., Хомутов А.Р., Безсуднова Е.Ю., Попов В.О.</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/27496">https://actanaturae.ru/2075-8251/article/view/27496</self-uri><abstract xml:lang="en"><p>Pyridoxal-5’-phosphate-dependent enzymes play a crucial role in nitrogen metabolism. Carbonyl compounds, such as O-substituted hydroxylamines, stand out among numerous specific inhibitors of these enzymes, including those of practical importance, because they react with pyridoxal-5’-phosphate in the active site of the enzymes to form stable oximes. O-substituted hydroxylamines mimic the side group of amino acid substrates, thus providing highly potent and specific inhibition of the corresponding enzymes. The interaction between D-amino acid transaminase from bacterium <italic>Haliscomenobacter</italic><italic> </italic><italic>hydrossis</italic> and 3-aminooxypropionic acid was studied in the present work. The structural and spectral analysis of the complex of this transaminase with 3-aminooxypropionic acid allowed us to clarify some features of the organization and functioning of its active site and illustrate one of the mechanisms of inhibition by the specific substrate, D-glutamic acid.</p></abstract><trans-abstract xml:lang="ru"><p>Пиридоксаль-5’-фосфат-зависимые ферменты занимают ключевое место в азотистом обмене. Среди многочисленных и специфических ингибиторов этих ферментов, включая и практически значимые, важное место отводится карбонильным соединениям, в том числе и О-замещенным гидроксиламинам, которые реагируют в активном центре ферментов с пиридоксаль-5’-фосфатом с образованием стабильных оксимов. Использование эфиров гидроксиламина, имитирующих строение боковых групп субстратов аминокислот, позволяет получать высокоэффективные и специфические ингибиторы соответствующих ферментов. В настоящей работе этот подход применили к изучению свойств трансаминазы D-аминокислот из бактерии <italic>Haliscomenobacter </italic><italic>hydrossis</italic>. Структурный и спектральный анализ комплекса этой трансаминазы с 3-аминооксипропионовой кислотой позволил уточнить особенности организации и функционирования ее активного центра и один из механизмов ингибирования специфическим субстратом D-глутаминовой кислотой.</p></trans-abstract><kwd-group xml:lang="en"><kwd>transaminase</kwd><kwd>enzymatic catalysis</kwd><kwd>crystal structure</kwd><kwd>inhibitor</kwd><kwd>3-aminooxypropionic acid</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>трансаминаза</kwd><kwd>ферментативный катализ</kwd><kwd>кристаллическая структура</kwd><kwd>ингибитор</kwd><kwd>3-аминооксипропионовая кислота</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд, (грант)</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation (grant)</institution></institution-wrap></funding-source><award-id>23-74-30004</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Eliot A.C., Kirsch J.F. // Annu. 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