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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">Journal of microbiology, epidemiology and immunobiology</journal-id><journal-title-group><journal-title xml:lang="en">Journal of microbiology, epidemiology and immunobiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал микробиологии, эпидемиологии и иммунобиологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0372-9311</issn><issn publication-format="electronic">2686-7613</issn><publisher><publisher-name xml:lang="en">Central Research Institute for Epidemiology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">13988</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>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">ROLE OF PHAGE L07 LYSOGENY IN GENETIC VARIABILITY OF ESCHERICHIA COLI</article-title><trans-title-group xml:lang="ru"><trans-title>РОЛЬ ЛИЗОГЕНИИ ФАГА L07 В ГЕНЕТИЧЕСКОЙ ИЗМЕНЧИВОСТИ ESCHERICHIA COLI</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Aleshkin</surname><given-names>G. I</given-names></name><name xml:lang="ru"><surname>Алешкин</surname><given-names>Г. И</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Smelkova</surname><given-names>O. I</given-names></name><name xml:lang="ru"><surname>Смелкова</surname><given-names>О. И</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Timakova</surname><given-names>N. V</given-names></name><name xml:lang="ru"><surname>Тимакова</surname><given-names>Н. В</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dobrynina</surname><given-names>O. Yu</given-names></name><name xml:lang="ru"><surname>Добрынина</surname><given-names>О. Ю</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Umyarov</surname><given-names>A. M</given-names></name><name xml:lang="ru"><surname>Умяров</surname><given-names>А. М</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rusina</surname><given-names>O. Yu</given-names></name><name xml:lang="ru"><surname>Русина</surname><given-names>О. Ю</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Markov</surname><given-names>A. P</given-names></name><name xml:lang="ru"><surname>Марков</surname><given-names>А. П</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bolshakova</surname><given-names>T. N</given-names></name><name xml:lang="ru"><surname>Большакова</surname><given-names>Т. Н</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Gamaleya Research Institute of Epidemiology and Microbiology, Moscow, Russia</institution></aff><aff><institution xml:lang="ru">НИИ эпидемиологии и микробиологии им. Н.Ф.Гамалеи, Москва</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2014-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2014</year></pub-date><volume>91</volume><issue>6</issue><issue-title xml:lang="en">NO6 (2014)</issue-title><issue-title xml:lang="ru">№6 (2014)</issue-title><fpage>14</fpage><lpage>20</lpage><history><date date-type="received" iso-8601-date="2023-06-09"><day>09</day><month>06</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2014, Aleshkin G.I., Smelkova O.I., Timakova N.V., Dobrynina O.Y., Umyarov A.M., Rusina O.Y., Markov A.P., Bolshakova T.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2014, Алешкин Г.И., Смелкова О.И., Тимакова Н.В., Добрынина О.Ю., Умяров А.М., Русина О.Ю., Марков А.П., Большакова Т.Н.</copyright-statement><copyright-year>2014</copyright-year><copyright-holder xml:lang="en">Aleshkin G.I., Smelkova O.I., Timakova N.V., Dobrynina O.Y., Umyarov A.M., Rusina O.Y., Markov A.P., Bolshakova T.N.</copyright-holder><copyright-holder xml:lang="ru">Алешкин Г.И., Смелкова О.И., Тимакова Н.В., Добрынина О.Ю., Умяров А.М., Русина О.Ю., Марков А.П., Большакова Т.Н.</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://microbiol.crie.ru/jour/article/view/13988">https://microbiol.crie.ru/jour/article/view/13988</self-uri><abstract xml:lang="en"><p>Aim. Determine the possibility oflysogenization of Escherichia coli single strain DNA (ssDNA) by le7 bacteriophage from the Microviridae family and determine the role of phage le7 lysogeny in genetic variability of these bacteria. Materials and methods. A method of E. coli K12 lysogeniza-tion by phage le7 was developed. A spot-test for the control of resistance of the obtained lysogens against phage le7 and determination of lysogen le7 spontaneous production was worked out. Criteria for phage le7 identification, that is spontaneously produced by E. coli K12 lysogens, were proposed. A kit of isogenic E. coli strains, that vary by mutations in ptsI, ptsH and fruA genes, that code phosphoenolpyruvate (PEP):carbohydrate phosphotransferase system (PTS) proteins, was constructed. Results. The ability of highly virulent bacteriophage le7 to lysogenize E. coli was shown. A reduction of le7 titers in ptsI, ptsH and fruA E. coli K12 mutants was demonstrated compared with titers in wild-type bacteria. Lytic bacteriophage le7 was also able to lysogenize ptsI, ptsH and fruA mutants at a high frequency. Lysogens are resistant to phages le7, phiX174 of Microvirus genus and spontaneously produce le7. Conclusion. Bacteriophage le7 ofthe Microviridae family is able to lysogenize E. coli K12 and vertically transfer genome of this lytic phage. As a result, lytic phage le7 takes part in bacterial variability as a factor of lysogen selection in bacteria population corresponding to PTS mutants by phenotype.</p></abstract><trans-abstract xml:lang="ru"><p>Цель. Определить возможность лизогенизации Escherichia coli однонитевой ДНК (онДНК)-бактериофагом le7 из семейства Microviridae и установить роль лизогении фага le7 в генетической изменчивости этих бактерий. Материалы и методы. Разработана методика лизогенизации E.coli K12 фагом le7. Отработан спот-тест для проверки резистентности полученных лизогенов к фагу le7 и определения спонтанной продукции le7 лизогенами. Предложены критерии идентификации фага le7, спонтанно продуцируемого лизогенами E. coli K12. Сконструирован набор изогенных штаммов E. coli, отличающихся мутациями в генах ptsI, ptsH и fruA, кодирующих белки фосфоенолпируват (ФЕП):углевод фосфотрансферазной системы (ФТС). Результаты. Показана способность высоковирулентного бактериофага le7 к лизогенизации E.coli. Продемонстрировано снижение титров le7 на мутантах ptsI, ptsH и fruA E. coli K12, по сравнению с титрами на бактериях дикого типа. При этом установлено, что литический бактериофаг le7 способен с повышенной частотой лизогенизировать мутанты ptsI, ptsH и fruA. Лизогены резистентны к фагам le7, phiX174 рода Microvirus и спонтанно продуцируют le7. Заключение. Бактериофаг le7 из семейства Microviridae способен к лизогенизации E. coli K12 и вертикальному переносу генома этого литического фага. В результате литический фаг le7 участвует в бактериальной изменчивости как фактор отбора лизогенов в популяции бактерий, соответствующих по фенотипу мутантам ФТС.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Escherichia coli</kwd><kwd>ptsH</kwd><kwd>ptsI</kwd><kwd>ssDNA bacteriophage le7</kwd><kwd>Microviridae family</kwd><kwd>lysogeny</kwd><kwd>Escherichia coli</kwd><kwd>phosphoenolpyruvate:carbohydrate phosphotransferase system</kwd><kwd>fruA</kwd><kwd>ptsH</kwd><kwd>ptsI mutants</kwd><kwd>genetic variability</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>онДНК-бактериофаг le7</kwd><kwd>семейство Microviridae</kwd><kwd>лизогения</kwd><kwd>фосфоенолпируват:углевод фосфотрансферазная система</kwd><kwd>мутанты fruA</kwd><kwd>генетическая изменчивость</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Бондаренко В.М. «Острова» патогенности бактерий. 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