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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">actabiomedica</journal-id><journal-title-group><journal-title xml:lang="ru">Acta Biomedica Scientifica</journal-title><trans-title-group xml:lang="en"><trans-title>Acta Biomedica Scientifica</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2541-9420</issn><issn pub-type="epub">2587-9596</issn><publisher><publisher-name>Scientific Centre for Family Health and Human Reproduction Problems</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.12737/23416</article-id><article-id custom-type="elpub" pub-id-type="custom">actabiomedica-300</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>МИКРОБИОЛОГИЯ И ВИРУСОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MICROBIOLOGY AND VIRUSOLOGY</subject></subj-group></article-categories><title-group><article-title>Выявление мембраносвязанных протеаз Francisella tularensis</article-title><trans-title-group xml:lang="en"><trans-title>Detection of membrane-bound proteases of Francisella tularensis</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>Корнева</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Korneva</surname><given-names>A. V.</given-names></name></name-alternatives><email xlink:type="simple">adm@chumin.irkutsk.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>Николаев</surname><given-names>В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikolaev</surname><given-names>V. B.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Козлов</surname><given-names>С. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozlov</surname><given-names>C. N.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Марков</surname><given-names>Е. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Markov</surname><given-names>E. Y.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Мазепа</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mazepa</surname><given-names>A. V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Попова</surname><given-names>Ю. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Popova</surname><given-names>Y. O.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФКУЗ «Иркутский научно-исследовательский противочумный институт Сибири и Дальнего Востока» Роспотребнадзора</institution></aff><aff xml:lang="en"><institution>Irkutsk Antiplague Research Institute of Siberia and Far East of Rospotrebnadzor</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>28</day><month>09</month><year>2016</year></pub-date><volume>1</volume><issue>5</issue><fpage>155</fpage><lpage>159</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Корнева А.В., Николаев В.B., Козлов С.Н., Марков Е.Ю., Мазепа А.В., Попова Ю.О., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Корнева А.В., Николаев В., Козлов С.Н., Марков Е.Ю., Мазепа А.В., Попова Ю.О.</copyright-holder><copyright-holder xml:lang="en">Korneva A.V., Nikolaev V.B., Kozlov C.N., Markov E.Y., Mazepa A.V., Popova Y.O.</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://www.actabiomedica.ru/jour/article/view/300">https://www.actabiomedica.ru/jour/article/view/300</self-uri><abstract><p>Проведено исследование наличия протеолитической активности и состав протеаз в поверхностных структурах клеток шести штаммов Francisella tularensis разных подвидов. Препараты мембранной фракции возбудителя туляремии получали путем обработки микробной массы мочевиной. Субстратный электрофорез выявил три общих для всех штаммов полипептида, обладающих протеолитической активностью. У препаратов F. tularensis subsp. nearctica и F. tularensis subsp. novicida обнаружены дополнительные полосы протеаз.</p></abstract><trans-abstract xml:lang="en"><p>Sterile preparations of membrane fractions were prepared by processing of live Francisella tularensis cells of different subspecies with 4.5 M urea solution and differential centrifugation. For the first time, proteolytic activity was detected and studied by tests of radial enzyme diffusion and substrate polyacrylamide gel electrophoresis using gelatin as a substrate. Spectrum of gelatinases in the resulted preparation were detected. Quantitative inter-strain differences in the protease activities and their qualitative composition in membrane preparations of various virulent F. tularensis strains was analyzed. Avirulent F. tularensis 21/400 subsp. holarctica (1-214) strain demonstrated the greatest gelatinase activity in enzyme diffusion method and the lowest hydrolytic activity was seen in F. tularensis B-399 A-Cole subsp. tularensis (1-386) and F. tularensis Utah 112 subsp. novicida (1-384), other preparations showed intermediate activity. Enzyme electrophoresis in the protease spectra determined the presence of proteins with proteases activity 50-100 kDa, and in the spectrum preparations of F. tularensis 1-386 and 1-384 were detected additional bands of proteases.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>субклеточные фракции</kwd><kwd>наружные мембраны</kwd><kwd>ферменты</kwd><kwd>протеазы протеолитическая активность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Francisella tularensis</kwd><kwd>Francisella tularensis</kwd><kwd>subcellular fractions</kwd><kwd>outer membrane</kwd><kwd>enzyme</kwd><kwd>protease</kwd><kwd>proteolytic activity</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">Олсуфьев Н.Г. Таксономия, микробиология и лабораторная диагностика возбудителя туляремии. -М.: Медицина, 1975. - 192 с</mixed-citation><mixed-citation xml:lang="en">Олсуфьев Н.Г. 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