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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">microbe</journal-id><journal-title-group><journal-title xml:lang="ru">Проблемы особо опасных инфекций</journal-title><trans-title-group xml:lang="en"><trans-title>Problems of Particularly Dangerous Infections</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0370-1069</issn><issn pub-type="epub">2658-719X</issn><publisher><publisher-name>Russian Research Anti-Plague Institute “Microbe”</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21055/0370-1069-2019-2-87-92</article-id><article-id custom-type="elpub" pub-id-type="custom">microbe-1154</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group></article-categories><title-group><article-title>Рекомбинантный штамм Escherichia coli с повышенной продукцией нейраминидазы Vibrio cholerae</article-title><trans-title-group xml:lang="en"><trans-title>Recombinant Escherichia coli Strain with Enhanced Production of Vibrio cholerae Neuraminidase</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>Монахова</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Monakhova</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>344002, Ростов-на-Дону, ул. М.Горького, 117/40</p></bio><bio xml:lang="en"><p>117/40, M.Gor`kogo St., Rostov-on-Don, 344002</p></bio><email xlink:type="simple">monakhova_ev@antiplague.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>Демидова</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Demidova</surname><given-names>G. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>344002, Ростов-на-Дону, ул. М.Горького, 117/40</p></bio><bio xml:lang="en"><p>117/40, M.Gor`kogo St., Rostov-on-Don, 344002</p></bio><email xlink:type="simple">plague@aaanet.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>Писанов</surname><given-names>Р. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pisanov</surname><given-names>R. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>344002, Ростов-на-Дону, ул. М.Горького, 117/40</p></bio><bio xml:lang="en"><p>117/40, M.Gor`kogo St., Rostov-on-Don, 344002</p></bio><email xlink:type="simple">plague@aaanet.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>Дуванова</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Duvanova</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>344002, Ростов-на-Дону, ул. М.Горького, 117/40</p></bio><bio xml:lang="en"><p>117/40, M.Gor`kogo St., Rostov-on-Don, 344002</p></bio><email xlink:type="simple">plague@aaanet.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>Мишанькин</surname><given-names>Б. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Mishan’kin</surname><given-names>B. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>344002, Ростов-на-Дону, ул. М.Горького, 117/40</p></bio><bio xml:lang="en"><p>117/40, M.Gor`kogo St., Rostov-on-Don, 344002</p></bio><email xlink:type="simple">plague@aaanet.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФКУЗ «Ростовский-на-Дону научно-исследовательский противочумный институт»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Rostov-on-Don Research Anti-Plague Institute</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>03</day><month>07</month><year>2019</year></pub-date><volume>0</volume><issue>2</issue><fpage>87</fpage><lpage>92</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Монахова Е.В., Демидова Г.В., Писанов Р.В., Дуванова О.В., Мишанькин Б.Н., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Монахова Е.В., Демидова Г.В., Писанов Р.В., Дуванова О.В., Мишанькин Б.Н.</copyright-holder><copyright-holder xml:lang="en">Monakhova E.V., Demidova G.V., Pisanov R.V., Duvanova O.V., Mishan’kin B.N.</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://journal.microbe.ru/jour/article/view/1154">https://journal.microbe.ru/jour/article/view/1154</self-uri><abstract><p>Целью работы явилось клонирование гена nanH Vibrio cholerae в составе плазмидного вектора, обеспечивающего экспрессию чужеродных генов под контролем т5-промотора, и создание штамма E. coli – продуцента рекомбинантной нейраминидазы.</p><p>Материалы и методы. Донором ДНК послужил штамм V. cholerae о1, векторной плазмидой – pQE30. Ген амплифицировали с помощью пцр, клонирование осуществляли общепринятыми методами, продуктивность рекомбинантов и локализацию искомого белка определяли по результатам электрофореза лизатов клеток. Нейраминидазную активность определяли по наличию флуоресценции в ультрафиолетовом свете после инкубации со специфическим субстратом (4-метилумбеллиферил-N-ацетилнейраминовой кислотой). результаты и обсуждение. Сконструирована рекомбинантная плазмида pNanH, содержащая ген nanH V. cholerae, встроенный по сайтам BamHI-PstI в полилинкер pQE30. Экспрессия клонированного гена в штамме-продуценте E. Сoli JM103pNanH происходит под контролем т5-промотора при индукции изопропил-β-D-тиогалактозидом (иптг). Штамм обладает нейраминидазной активностью. рекомбинантный белок NanH накапливается в клетках продуцента в двух формах. первая, с молекулярной массой (мм) 89,5 кда, представляет собой непроцессированный белок с гексагистидиновым блоком (6His-tag) на N-конце и находится в тельцах включения. Ее содержание составляет 5,6–6,6 % суммарных клеточных белков. вторая, с мм 83 кда, обнаруживается в периплазматическом пространстве клеток и соответствует зрелой NanH, содержание составляет 3,4–3,8 %. Их общее содержание – 9–10 % суммарных клеточных белков, что позволяет считать штамм E. coli JM103pNanH суперпродуцентом искомого фактора. Штамм может быть использован для получения NanH V. cholerae в целях создания специфических диагностических, терапевтических и фармацевтических препаратов, а также для изучения свойств этого белка как фактора патогенности/персистенции возбудителя. </p></abstract><trans-abstract xml:lang="en"><p>Objective of this work was cloning of the Vibrio cholerae nanH gene as part of a plasmid vector, providing expression of foreign genes under the control of T5 promoter, and construction of a E. coli strain – producer of V. cholerae recombinant neuraminidase.</p><sec><title>Materials and methods</title><p>Materials and methods. V. cholerae о1 strain served as a DNA donor, pQE30 – as a vector plasmid. The gene was PCR-amplifi ed, the cloning was carried out by means of conventional methods, performance of recombinants and localization of the required protein was determined based on the results of electrophoresis of cell lysates. Neuraminidase activity was identifi ed by fl uorescence in ultraviolet light after incubation with specifi c substrate (4-methylumbelliferyl-N-acetylneuraminic acid).</p></sec><sec><title>Results and discussion</title><p>Results and discussion. Recombinant plasmid pNanH, containing the cloned gene nanH V. cholerae, has been constructed. The gene is inserted into BamHI-PstI sites of the polylinker of pQE30. Expression of the cloned gene in the producer strain E. coli JM103pNanH occurs under the control of T5 promoter after isopropyl-1-thio-β-D-galactopyranoside (IPTG) induction. The strain shows neuraminidase activity. The recombinant NanH protein is accumulated in the producer’s cells in two forms. The fi rst form, with molecular mass (MM) of 89.5 kDa, is an unprocessed protein with the hexahistidine block (6His-tag) at its N-terminus, it is located in inclusion bodies. Its percentage is 5.6–6.6 % of the total cell proteins. The second one, with MM of 83 kDa, is found in the periplasmic space and corresponds to the mature NanH, its percentage being 3.4–3.8 %. The total percentage of both forms is 9–10 % of total cell proteins, which allows to consider the strain E. coli JM103pNanH to be a super-producer of the required protein. The strain may be used for purifi cation of NanH preparations for construction of specifi c diagnostic, therapeutic and pharmaceutical preparations as well as for investigation of the protein as a virulence/persistence factor of the pathogen. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>нейраминидаза Vibrio cholerae</kwd><kwd>рекомбинантная плазмида</kwd><kwd>клонирование гена</kwd><kwd>экспрессия в Escherichia coli</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Vibrio cholerae neuraminidase</kwd><kwd>gene cloning</kwd><kwd>recombinant plasmid</kwd><kwd>expression in Escherichia coli</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">Galen J.E., Ketley J.M., Fasano A., Richardson S.N., Wasserman S.S., Kaper J.B. Role of Vibrio cholerae neuraminidase in the function of cholera toxin. Infect. Immun. 1992; 60(2):406–15. PMID: 1730470. 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