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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Infection and Immunity</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Infection and Immunity</journal-title><trans-title-group xml:lang="ru"><trans-title>Инфекция и иммунитет</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2220-7619</issn><issn publication-format="electronic">2313-7398</issn><publisher><publisher-name xml:lang="en">SPb RAACI</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">244</article-id><article-id pub-id-type="doi">10.15789/2220-7619-2014-4-339-346</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">THE ROLE OF mutR GENE IN METABOLISM AND VIRULENCE OF emm12 GENOTYPE STREPTOCOCCUS PYOGENES STRAINS</article-title><trans-title-group xml:lang="ru"><trans-title>РОЛЬ ГЕНА mutR В МЕТАБОЛИЗМЕ И ВИРУЛЕНТНОСТИ ШТАММОВ STREPTOCOCCUS PYOGENES ГЕНОТИПА emm12</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zutkis</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Зуткис</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Junior Researcher, Laboratory of the Functional Genomics and Proteomics of Microorganisms, Department of Molecular Microbiology, Institute of Experimental Medicine, St. Petersburg, Russian Federation</p></bio><bio xml:lang="ru"><p>младший научный сотрудник лаборатории функциональной геномики и протеомики микроорганизмов отдела молекулярной микробиологии ФГБУ НИИЭМ СЗО РАМН, Санкт-Петербург, Россия</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Milman</surname><given-names>B. L.</given-names></name><name xml:lang="ru"><surname>Мильман</surname><given-names>Б. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, MD (Chemistry), Head of the Laboratory of Biomedical and Pharmaceutical Mass-Spectrometry, Department of Molecular Microbiology, Institute of Experimental Medicine, St. Petersburg, Russian Federation</p></bio><bio xml:lang="ru"><p>д.х.н., зав. лабораторией биомедицинской и фармацевтической масс-спектрометрии отдела молекулярной микробиологии ФГБУ НИИЭМ СЗО РАМН, Санкт-Петербург, Россия</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dmitriev</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Дмитриев</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, MD (Biology), Deputy Director on Science, Head of the Department of Ecological Physiology, Institute of Experimental Medicine, St. Petersburg, Russian Federation</p></bio><bio xml:lang="ru"><p>д.б.н., зам. директора по научной работе, зав. отделом экологической физиологии ФГБУ НИИЭМ СЗО РАМН, Санкт-Петербург, Россия</p></bio><email>admitriev10@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Experimental Medicine of the North-West Branch of the Russian Academy of Medical Sciences, St. Petersburg, Russian Federation</institution></aff><aff><institution xml:lang="ru">ФГБУ НИИ экспериментальной медицины СЗО РАМН, Санкт-Петербург, Россия</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Institute of Experimental Medicine of the North-West Branch of the Russian Academy of Medical Sciences, St. Petersburg, Russian Federation 197376, Russian Federation, St. Petersburg, Аkademika Pavlova str., 12, Institute of Experimental Medicine. Phone: +7 (812) 234-68-57. Fax: +7 (812) 234-94-77</institution></aff><aff><institution xml:lang="ru">ФГБУ НИИ экспериментальной медицины СЗО РАМН, Санкт-Петербург, Россия 197376, Россия, Санкт-Петербург, ул. акад. Павлова, 12, ФГБУ НИИЭМ СЗО РАМН. Тел.: (812) 234-68-57. Факс: (812) 234-94-77</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2014-12-03" publication-format="electronic"><day>03</day><month>12</month><year>2014</year></pub-date><volume>4</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>339</fpage><lpage>346</lpage><history><date date-type="received" iso-8601-date="2015-02-03"><day>03</day><month>02</month><year>2015</year></date><date date-type="accepted" iso-8601-date="2015-02-03"><day>03</day><month>02</month><year>2015</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2014, Zutkis A.A., Milman B.L., Dmitriev A.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2014, Зуткис А.А., Мильман Б.Л., Дмитриев А.В.</copyright-statement><copyright-year>2014</copyright-year><copyright-holder xml:lang="en">Zutkis A.A., Milman B.L., Dmitriev A.V.</copyright-holder><copyright-holder xml:lang="ru">Зуткис А.А., Мильман Б.Л., Дмитриев А.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://iimmun.ru/iimm/article/view/244">https://iimmun.ru/iimm/article/view/244</self-uri><abstract xml:lang="en"><p>In the present study the functional role of the mutR regulatory protein gene of Streptococcus pyogenes (emm12) was studied. The mutR gene was inactivated in the strains no. 97 and no. 152 by insertional mutagenesis. Inactivation of the mutR gene was found to affect the dynamic and characteristics of bacterial growth in liquid medium. Expression of secreted nucleases was significantly lower in the mutant strains compared to the wild-type strains. Two-dimensional electrophoresis and mass-spectrometry revealed differences in expression of number of the proteins in mutant strainscompared to the wild-type strains. Inactivation of the mutR gene negatively affected capacity of S. pyogenes to adhere to human epithelial cells. Finally, the virulence properties of the no. 152[mutR] mutant strains were found to be 4,7-fold less compared to the strain no. 152, while the no. 97[mutR] mutant strain became avirulent compared to the strain no. 97 due to insertional inactivation of the mutR gene.</p></abstract><trans-abstract xml:lang="ru"><p>В работе изучена функциональная роль гена белка-регулятора транскрипции mutR Streptococcus pyogenes (тип emm12). Ген mutR инактивирован в штаммах № 97 и № 152 методом инсерционного мутагенеза. Показано, что инактивация гена влияет на характер и динамику роста культур в жидких питательных средах. Обнаружено, что экспрессия секретируемых нуклеаз у мутантных штаммов существенно ниже по сравнению с исходными штаммами. Методами двумерного электрофореза и масс-спектрометрии выявлена разница в экспрессии ряда белков у мутантных штаммов по сравнению с исходными штаммами. Показано, что в результате инактивации гена mutR адгезивные свойства S. pyogenes к клеткам человеческого эпителия значительно снижаются. Анализ вирулентных свойств на мышиной модели выявил, что инактивация гена mutR привела к снижению вирулентных свойств штамма № 152 в 4,7 раза, а мутантный штамм № 97[mutR] оказался авирулентным по сравнению со штаммом № 97.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Streptococcus pyogenes</kwd><kwd>mutR</kwd><kwd>transcriptional regulation</kwd><kwd>metabolism</kwd><kwd>virulence.</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Streptococcus pyogenes</kwd><kwd>mutR</kwd><kwd>регуляция транскрипции</kwd><kwd>метаболизм</kwd><kwd>вирулентность</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Дмитриев А.В., Рождественская А.С., Зуткис А.А., Тотолян А.А. Направленная регуляция п 1. атогенных свойств стрептококков // Медицинский академ. журн. 2009. № 4. С. 50–58. 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