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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">10421</article-id><article-id pub-id-type="doi">10.32607/20758251-2016-8-3-77-87</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">Biosynthesis of poly(3-hydroxybutyrateco-3-hydroxy-4-methylvalerate) by Strain Azotobacter chroococcum 7B</article-title><trans-title-group xml:lang="ru"><trans-title>Биосинтез сополимера поли-3-оксибутират-со-3-окси-4-метилвалерата штаммом Azotobacter chroococcum 7Б</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bonartsev</surname><given-names>A. P.</given-names></name><name xml:lang="ru"><surname>Бонарцев</surname><given-names>A. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.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>Bonartseva</surname><given-names>G. A.</given-names></name><name xml:lang="ru"><surname>Бонарцева</surname><given-names>Г. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Myshkina</surname><given-names>V. L.</given-names></name><name xml:lang="ru"><surname>Мышкина</surname><given-names>В. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Voinova</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Воинова</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mahina</surname><given-names>T. K.</given-names></name><name xml:lang="ru"><surname>Махина</surname><given-names>T. K.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zharkova</surname><given-names>I. I.</given-names></name><name xml:lang="ru"><surname>Жаркова</surname><given-names>И. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Yakovlev</surname><given-names>S. G.</given-names></name><name xml:lang="ru"><surname>Яковлев</surname><given-names>С. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zernov</surname><given-names>A. L.</given-names></name><name xml:lang="ru"><surname>Зернов</surname><given-names>A. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ivanova</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Иванова</surname><given-names>E. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Akoulina</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Акулина</surname><given-names>E. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kuznetsova</surname><given-names>E. S.</given-names></name><name xml:lang="ru"><surname>Кузнецова</surname><given-names>E. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zhuikov</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Жуйков</surname><given-names>В. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Alekseeva</surname><given-names>S. G.</given-names></name><name xml:lang="ru"><surname>Алексеева</surname><given-names>С. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Podgorskii</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Подгорский</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bessonov</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Бессонов</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff5"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kopitsyna</surname><given-names>M. N.</given-names></name><name xml:lang="ru"><surname>Копицына</surname><given-names>M. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff5"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Morozov</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Морозов</surname><given-names>A. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff5"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Milanovskiy</surname><given-names>E. Y.</given-names></name><name xml:lang="ru"><surname>Милановский</surname><given-names>E. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tyugay</surname><given-names>Z. N.</given-names></name><name xml:lang="ru"><surname>Тюгай</surname><given-names>З. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bykova</surname><given-names>G. S.</given-names></name><name xml:lang="ru"><surname>Быкова</surname><given-names>Г. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kirpichnikov</surname><given-names>M. P.</given-names></name><name xml:lang="ru"><surname>Кирпичников</surname><given-names>M. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shaitan</surname><given-names>K. V.</given-names></name><name xml:lang="ru"><surname>Шайтан</surname><given-names>K. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ant_bonar@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">M.V. 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">A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Федеральный исследовательский центр «Фундаментальные основы биотехнологии» РАН</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">JSC «Institute of Plastics»</institution></aff><aff><institution xml:lang="ru">ОАО «Институт пластмасс»</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Federal Medical Biological Agency</institution></aff><aff><institution xml:lang="ru">Федеральный научно-клинический центр физико-химической медицины Федерального медико-биологического агентства</institution></aff></aff-alternatives><aff-alternatives id="aff5"><aff><institution xml:lang="en">Bauman Moscow State Technical University</institution></aff><aff><institution xml:lang="ru">Московский государственный технический университет им. Н.Э. Баумана</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2016-09-15" publication-format="electronic"><day>15</day><month>09</month><year>2016</year></pub-date><volume>8</volume><issue>3</issue><issue-title xml:lang="en">VOL 8, NO3 (2016)</issue-title><issue-title xml:lang="ru">ТОМ 8, №3 (2016)</issue-title><fpage>77</fpage><lpage>87</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 ©; 2016, Bonartsev A.P., Bonartseva G.A., Myshkina V.L., Voinova V.V., Mahina T.K., Zharkova I.I., Yakovlev S.G., Zernov A.L., Ivanova E.V., Akoulina E.A., Kuznetsova E.S., Zhuikov V.A., Alekseeva S.G., Podgorskii V.V., Bessonov I.V., Kopitsyna M.N., Morozov A.S., Milanovskiy E.Y., Tyugay Z.N., Bykova G.S., Kirpichnikov M.P., Shaitan K.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2016, Бонарцев A.П., Бонарцева Г.A., Мышкина В.Л., Воинова В.В., Махина T.K., Жаркова И.И., Яковлев С.Г., Зернов A.Л., Иванова E.В., Акулина E.A., Кузнецова E.С., Жуйков В.A., Алексеева С.Г., Подгорский В.В., Бессонов И.В., Копицына M.Н., Морозов A.С., Милановский E.Ю., Тюгай З.Н., Быкова Г.С., Кирпичников M.П., Шайтан K.В.</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="en">Bonartsev A.P., Bonartseva G.A., Myshkina V.L., Voinova V.V., Mahina T.K., Zharkova I.I., Yakovlev S.G., Zernov A.L., Ivanova E.V., Akoulina E.A., Kuznetsova E.S., Zhuikov V.A., Alekseeva S.G., Podgorskii V.V., Bessonov I.V., Kopitsyna M.N., Morozov A.S., Milanovskiy E.Y., Tyugay Z.N., Bykova G.S., Kirpichnikov M.P., Shaitan K.V.</copyright-holder><copyright-holder xml:lang="ru">Бонарцев A.П., Бонарцева Г.A., Мышкина В.Л., Воинова В.В., Махина T.K., Жаркова И.И., Яковлев С.Г., Зернов A.Л., Иванова E.В., Акулина E.A., Кузнецова E.С., Жуйков В.A., Алексеева С.Г., Подгорский В.В., Бессонов И.В., Копицына M.Н., Морозов A.С., Милановский E.Ю., Тюгай З.Н., Быкова Г.С., Кирпичников M.П., Шайтан K.В.</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/10421">https://actanaturae.ru/2075-8251/article/view/10421</self-uri><abstract xml:lang="en"><p>Production of novel polyhydroxyalkanoates (PHAs), biodegradable polymers for biomedical applications, and biomaterials based on them is a promising trend in modern bioengineering. We studied the ability of an effective strain-producer Azotobacter chroococcum 7B to synthesize not only poly(3-hydroxybutyrate) homopolymer (PHB) and its main copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), but also a novel copolymer, poly(3-hydroxybutyrate-co-3-hydroxy-4-methylvalerate) (PHB4MV). For the biosynthesis of PHB copolymers, we used carboxylic acids as additional carbon sources and monomer precursors in the chain of synthesized copolymers. The main parameters of these polymers’ biosynthesis were determined: strain-producer biomass yield, polymer yield, molecular weight and monomer composition of the synthesized polymers, as well as the morphology of A.<ext-link ext-link-type="uri" xlink:href="http://www.bpierini.com.br/wp-includes/Requests/Exception/HTTP/repair-rolex-replica.html">repair rolex replica</ext-link> chroococcum 7B bacterial cells. The physico-chemical properties of the polymers were studied using nuclear magnetic resonance spectroscopy (NMR), differential scanning calorimetry (DSC), contact angle test, and other methods. In vitro biocompatibility of the obtained polymers was investigated using stromal cells isolated from the bone marrow of rats with the XTT cell viability test. The synthesis of the novel copolymer PHB4MV and its chemical composition were demonstrated by NMR spectroscopy: the addition of 4-methylvaleric acid to the culture medium resulted in incorporation of 3-hydroxy-4-methylvalerate (3H4MV) monomers into the PHB polymer chain (0.6 mol%). Despite the low molar content of 3H4MV in the obtained copolymer, i<ext-link ext-link-type="uri" xlink:href="http://www.bodysculptor.com/wp-content/uploads/2017/04/rolex-replica-deep-sea.html">rolex replica deep sea</ext-link>ts physico-chemical properties were significantly different from those of the PHB homopolymer: it has lower crystallinity and a higher contact angle, i.e. the physico-chemical properties of the PHB4MV copolymer containing only 0.6 mol% of 3H4MV corresponded to a PHBV copolymer with a molar content ranging from 2.5% to 7.8%. In vitro biocompatibility of the obtained PHB4MV copolymer, measured in the XTT test,<ext-link ext-link-type="uri" xlink:href="http://www.bodysculptor.com/wp-content/uploads/2017/04/rolex-replica-deep-sea.html">rolex replica deep sea</ext-link> was not statistically different from the cell growth of PHB and PHBV polymers, <ext-link ext-link-type="uri" xlink:href="https://stkipsingkawang.ac.id/vclass/group/tests/fixtures/rolex-datejust-real-or-fake.html">rolex datejust real or fake</ext-link> which make its use possible in biomedical research and development.</p></abstract><trans-abstract xml:lang="ru"><p>Получение новых полиоксиалканоатов (ПОА) - биоразлагаемых полимеров биомедицинского на- значения и биоматериалов на их основе - перспективное направление современной биоинженерии. Изучена способность эффективного штамма-продуцента Azotobacter chroococcum 7Б синтезировать не только гомополимер поли-3-оксибутирата (ПОБ) и его основной сополимер поли-3-оксибутират-со-3-оксивалерат (ПОБВ), но и новый сополимер поли-3-оксибутират-со-3-окси-4-метилвалерат (ПОБ4МВ). Для биосинтеза сополимеров ПОБ мы использовали карбоновые кислоты в качестве дополнительных источников углерода и предшественников мономеров в цепи синтезируемых сополимеров. Определены основные параметры биосинтеза полимеров: урожай биомассы штамма-продуцента, продукция полимера, молекулярная масса и мономерный состав синтезируемых полимеров, а также морфология клеток A. chroococcum 7Б. Физико-химические свойства полученных полимеров определены с использованием спектроскопии ядерного магнитного резонанса (ЯМР), дифференциально-сканирующей калориметрии (ДСК), измерения контактного угла смачивания и др. Рост клеток на полученных полимерах in vitro оценен с использованием стромальных клеток (СК), выделенных из костного мозга крыс, и теста анализа жизнеспособности клеток ХТТ. Синтез нового сополимера ПОБ4МВ показан путем определения его химического состава методом спектроскопии ЯМР - добавление в культуральную среду 4-метилвалериановой кислоты приводило к включению в полимерную цепь ПОБ мономеров 3-окси-4-метилвалерата (3О4МВ) (0.6 мол. %). Несмотря на малое молярное содержание 3О4МВ в составе сополимера, его физико-химические свойства значительно отличались от свойств гомополимера ПОБ: имел сниженную степень кристалличности и повышенный контактный угол смачивания, т.е. по своим физико-химическим свойствам сополимер ПОБ4МВ с содержанием 3О4МВ всего 0.6 мол. % соответствовал сополимеру ПОБВ с молярным содержанием от 2.5 до 7.8%. Рост СК, определенный по тесту ХТТ, на полученном сополимере ПОБ4МВ in vitro не отличался статистически от их роста на полимерах ПОБ и ПОБВ, что позволяет использовать его в биомедицинских разработках и исследованиях.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Azotobacter chroococcum 7B</kwd><kwd>poly(3-hydroxybutyrate)</kwd><kwd>poly(3-hydroxybutyrate-co-3-hydroxy-4-methylvalerate)</kwd><kwd>biosynthesis</kwd><kwd>crystallinity</kwd><kwd>biocompatibility</kwd><kwd>bone marrow stromal cells</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Azotobacter chroococcum 7Б</kwd><kwd>биосинтез</kwd><kwd>биосовместимость</kwd><kwd>кристалличность</kwd><kwd>поли-3-оксибутират</kwd><kwd>поли-3-оксибутират-со-3-окси-4-метилвалерат</kwd><kwd>стромальные клетки костного мозга</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by a RFBR ofi_m grant, project No. 15-29-04856.</funding-statement><funding-statement xml:lang="ru">Работа поддержана грантом РФФИ офи-м, проект № 15-29-04856.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Birmingham Jenkins M. // Biomedical polymers // Biomedical polymers Ed. 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