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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">11713</article-id><article-id pub-id-type="doi">10.32607/actanaturae.11713</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">Isolation and Biochemical Characterization of Recombinant Transketolase from Mycobacterium tuberculosis</article-title><trans-title-group xml:lang="ru"><trans-title>Выделение и биохимическая характеристика рекомбинантной транскетолазы Mycobacterium tuberculosis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shcherbakova</surname><given-names>Tatiana A.</given-names></name><name xml:lang="ru"><surname>Щербакова</surname><given-names>Татьяна Анатольевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Baldin</surname><given-names>Semen M.</given-names></name><name xml:lang="ru"><surname>Балдин</surname><given-names>Семен Михайлович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shumkov</surname><given-names>Mikhail S.</given-names></name><name xml:lang="ru"><surname>Шумков</surname><given-names>Михаил Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gushchina</surname><given-names>Irina V.</given-names></name><name xml:lang="ru"><surname>Гущина</surname><given-names>Ирина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nilov</surname><given-names>Dmitry K.</given-names></name><name xml:lang="ru"><surname>Нилов</surname><given-names>Дмитрий Константинович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Švedas</surname><given-names>Vytas K.</given-names></name><name xml:lang="ru"><surname>Швядас</surname><given-names>Витаутас Каятоно</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University, Belozersky Institute of Physicochemical Biology</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова, НИИ физико-химической биологии имени А.Н. Белозерского</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Federal Research Centre «Fundamentals of Biotechnology», Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Федеральный исследовательский центр «Фундаментальные основы биотехнологии» Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-07-21" publication-format="electronic"><day>21</day><month>07</month><year>2022</year></pub-date><volume>14</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>93</fpage><lpage>97</lpage><history><date date-type="received" iso-8601-date="2022-03-30"><day>30</day><month>03</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-05-24"><day>24</day><month>05</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Shcherbakova T.A., Baldin S.M., Shumkov M.S., Gushchina I.V., Nilov D.K., Švedas V.K.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Щербакова Т.А., Балдин С.М., Шумков М.С., Гущина И.В., Нилов Д.К., Швядас В.К.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Shcherbakova T.A., Baldin S.M., Shumkov M.S., Gushchina I.V., Nilov D.K., Švedas V.K.</copyright-holder><copyright-holder xml:lang="ru">Щербакова Т.А., Балдин С.М., Шумков М.С., Гущина И.В., Нилов Д.К., Швядас В.К.</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/11713">https://actanaturae.ru/2075-8251/article/view/11713</self-uri><abstract xml:lang="en"><p>Transketolase, an enzyme of the pentose phosphate pathway, plays an important role in the functioning of mycobacteria. Using plasmid pET-19b carrying the <italic>Rv1449c</italic> gene of transketolase from <italic>Mycobacterium tuberculosis</italic> and an additional histidine tag, we isolated and purified recombinant transketolase and determined the conditions for obtaining the apoform of the protein. The Michaelis constants were evaluated for the thiamine diphosphate cofactor in the presence of magnesium and calcium ions. We found that the affinity of mycobacterial transketolase for thiamine diphosphate is by three orders of magnitude lower than that of the human enzyme. Analysis of the structural organization of the active centers of homologous enzymes showed that this difference is due to a replacement of lysine residues by less polar amino acid residues.</p></abstract><trans-abstract xml:lang="ru"><p>Фермент пентозофосфатного пути транскетолаза играет важную роль в жизнедеятельности микобактерий. С использованием плазмиды, несущей ген транскетолазы <italic>Mycobacterium</italic> <italic>tuberculosis</italic> с дополнительным гистидиновым тагом, проведены выделение и очистка препарата рекомбинантной бактериальной транскетолазы, определены условия получения апоформы белка. Определены значения константы Михаэлиса для кофактора тиаминдифосфата в присутствии ионов магния и кальция. Обнаружено, что сродство транскетолазы микобактерий к тиаминдифосфату на три порядка ниже, чем у фермента человека. Анализ структурной организации активных центров гомологичных ферментов показал, что данное отличие обусловлено заменой остатков лизина на менее полярные аминокислотные остатки.</p></trans-abstract><kwd-group xml:lang="en"><kwd>transketolase</kwd><kwd>thiamine diphosphate</kwd><kwd>xylulose 5-phosphate</kwd><kwd>ribose 5-phosphate</kwd><kwd>mycobacteria</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>транскетолаза</kwd><kwd>тиаминдифосфат</kwd><kwd>ксилулозо-5-фосфат</kwd><kwd>рибозо-5-фосфат</kwd><kwd>микобактерии</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>15-14-00069-П</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Cole S.T., Brosch R., Parkhill J., Garnier T., Churcher C., Harris D., Gordon S.V., Eiglmeier K., Gas S., Barry C.E. 3rd, et al. // Nature. 1998. V. 393. P. 537–544.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Schenk G., Duggleby R.G., Nixon P.F. // Int. J. Biochem. Cell Biol. 1998. V. 30. P. 1297–1318.</mixed-citation></ref><ref id="B3"><label>3.</label><citation-alternatives><mixed-citation xml:lang="en">Sevostyanova I.A., Selivanov V.A., Yurshev V.A., Solovjeva O.N., Zabrodskaya S.V., Kochetov G.A. // Biochemistry (Mosc.). 2009. V. 74. P. 789–792.</mixed-citation><mixed-citation xml:lang="ru">Севостьянова И.А., Селиванов В.А., Юршев В.А., Соловьева О.Н., Забродская С.В., Кочетов Г.А. // Биохимия. 2009. Т. 74. С. 972–976.</mixed-citation></citation-alternatives></ref><ref id="B4"><label>4.</label><mixed-citation>Kochetov G.A., Solovjeva O.N. // Biochim. Biophys. Acta. 2014. V. 1844. P. 1608–1618.</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Wolucka B.A. // FEBS J. 2008. V. 275. P. 2691–2711.</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Fullam E., Pojer F., Bergfors T., Jones T.A., Cole S.T. // Open Biol. 2012. V. 2. P. 110026.</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Laemmly U.K., Favre M. // J. Mol. Biol. 1973. V. 80. P. 575–599.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Kochetov G.A. // Methods Enzymol. 1982. V. 90. P. 209–223.</mixed-citation></ref><ref id="B9"><label>9.</label><citation-alternatives><mixed-citation xml:lang="en">Meshalkina L.E., Solovjeva O.N., Khodak Y.A., Drutsa V.L., Kochetov G.A. // Biochemistry (Mosc.). 2010. V. 75. P. 873–880.</mixed-citation><mixed-citation xml:lang="ru">Мешалкина Л.Е., Соловьева О.Н., Ходак Ю.А., Друца В.Л., Кочетов Г.А. // Биохимия. 2010. Т. 75. С. 992–1000.</mixed-citation></citation-alternatives></ref><ref id="B10"><label>10.</label><mixed-citation>Nilsson U., Meshalkina L., Lindqvist Y., Schneider G. // J. Biol. Chem. 1997. V. 272. P. 1864–1869.</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Mitschke L., Parthier C., Schröder-Tittmann K., Coy J., Lüdtke S., Tittmann K. // J. Biol. Chem. 2010. V. 285. P. 31559–31570.</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Menke M., Berger B., Cowen L. // PLoS Comput. Biol. 2008. V. 4. P. e10.</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Humphrey W., Dalke A., Schulten K. // J. Mol. Graph. 1996. V. 14. P. 33–38.</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Kochetov G.A., Philippov P.P. // Biochem. Biophys. Res. Commun. 1970. V. 38. P. 930–933.</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Datta A.G., Racker E. // J. Biol. Chem. 1961. V. 236. P. 617–623.</mixed-citation></ref><ref id="B16"><label>16.</label><citation-alternatives><mixed-citation xml:lang="en">Kochetov G.A. // Biochemistry (Mosc.). 1986. V. 51. P. 2010–2029.</mixed-citation><mixed-citation xml:lang="ru">Кочетов Г.А. // Биохимия. 1986. Т. 51. С. 2010–2029.</mixed-citation></citation-alternatives></ref><ref id="B17"><label>17.</label><citation-alternatives><mixed-citation xml:lang="en">Sprenger G.A., Schörken U., Sprenger G., Sahm H. // Eur. J. Biochem. 1995. V. 230. P. 525–532.</mixed-citation><mixed-citation xml:lang="ru">Sprenger G.A., Schörken U., Sprenger G., Sahm H. // Eur. J. Biochem. 1995. V. 230. Р. 525–532.</mixed-citation></citation-alternatives></ref><ref id="B18"><label>18.</label><mixed-citation>Esakova O.A., Meshalkina L.E., Golbik R., Hübner G., Kochetov G.A. // Eur. J. Biochem. 2004. V. 271. P. 4189–4194.</mixed-citation></ref><ref id="B19"><label>19.</label><citation-alternatives><mixed-citation xml:lang="en">Solov’eva O.N., Meshalkina L.E., Kovina M.V., Selivanov V.A., Bykova I.A., Kochetov G.A. // Biochemistry (Mosc.). 2000. V. 65. P. 1202–1205.</mixed-citation><mixed-citation xml:lang="ru">Соловьева О.Н., Мешалкина Л.Е., Ковина М.В., Селиванов В.А., Быкова И.А., Кочетов Г.А. // Биохимия. 2000. Т. 65. С. 1421–1424.</mixed-citation></citation-alternatives></ref><ref id="B20"><label>20.</label><mixed-citation>Kochetov G.A., Sevostyanova I.A. // IUBMB Life. 2010. V. 62. P. 797–802.</mixed-citation></ref></ref-list></back></article>
