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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">10345</article-id><article-id pub-id-type="doi">10.32607/20758251-2018-10-2-65-70</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">Reversible Cyclic Thermal Inactivation of Oligopeptidase B from Serratia proteamaculans</article-title><trans-title-group xml:lang="ru"><trans-title>Обратимая циклическая термоинактивация олигопептидазы В из Serratia proteamaculans</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Оvchinnikova</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Овчинникова</surname><given-names>М. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>anna.mikhailova@ibch.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>Mikhailova</surname><given-names>A. G.</given-names></name><name xml:lang="ru"><surname>Михайлова</surname><given-names>А. Г.</given-names></name></name-alternatives><email>anna.mikhailova@ibch.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Karlinsky</surname><given-names>D. M.</given-names></name><name xml:lang="ru"><surname>Карлинский</surname><given-names>Д. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>anna.mikhailova@ibch.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gorlenko</surname><given-names>V. А.</given-names></name><name xml:lang="ru"><surname>Горленко</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>anna.mikhailova@ibch.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rumsh</surname><given-names>L. D.</given-names></name><name xml:lang="ru"><surname>Румш</surname><given-names>Л. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>anna.mikhailova@ibch.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry</institution></aff><aff><institution xml:lang="ru">Институт биоорганической химии имени академиков М.М. Шемякина и Ю.А. Овчинникова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Moscow State Pedagogical University</institution></aff><aff><institution xml:lang="ru">Московский педагогический государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2018-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2018</year></pub-date><volume>10</volume><issue>2</issue><issue-title xml:lang="en">VOL 10, NO2 (2018)</issue-title><issue-title xml:lang="ru">ТОМ 10, №2 (2018)</issue-title><fpage>65</fpage><lpage>70</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 ©; 2018, Оvchinnikova M.V., Mikhailova A.G., Karlinsky D.M., Gorlenko V.А., Rumsh L.D.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2018, Овчинникова М.В., Михайлова А.Г., Карлинский Д.М., Горленко В.А., Румш Л.Д.</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="en">Оvchinnikova M.V., Mikhailova A.G., Karlinsky D.M., Gorlenko V.А., Rumsh L.D.</copyright-holder><copyright-holder xml:lang="ru">Овчинникова М.В., Михайлова А.Г., Карлинский Д.М., Горленко В.А., Румш Л.Д.</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/10345">https://actanaturae.ru/2075-8251/article/view/10345</self-uri><abstract xml:lang="en"><p>A unique property was found for oligopeptidase B from Serratia proteamaculans (PSP) as well as its mutants: they can undergo reversible thermal inactivation at 37°C, with activity being restored or even increased with respect to the initial one upon subsequent cooling. The process can be repeated several times, with the same results achieved (up to 5 cycles). This effect can be explained by a shift in the equilibrium between the inactive open form of the enzyme and the active closed one upon variation of the incubation temperature.</p></abstract><trans-abstract xml:lang="ru"><p>Обнаружено уникальное свойство олигопептидазы В из Serratia proteamaculans (PSP) и ее мутантных вариантов - способность к обратимой термоинактивации при 37°C с возвращением и даже повышением активности выше первоначальной при последующем охлаждении. Процесс можно повторять с теми же результатами многократно (до пяти циклов). Данный эффект можно объяснить сдвигом равновесия между неактивной открытой формой фермента и активной закрытой при изменении температуры инкубации</p></trans-abstract><kwd-group xml:lang="en"><kwd>oligopeptidase B</kwd><kwd>Serratia proteamaculans</kwd><kwd>thermal inactivation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>олигопептидаза В, Serratia proteamaculans, термоинактивация</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by the Russian Science Foundation (grant No. 14-50-00131).</funding-statement><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Российского научного фонда (грант № 14-50-00131).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Burleigh B.A., Caler E.V., Webster P., Andrews N.W. // J. 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