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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">10.29413/ABS.2022-7.3.17</article-id><article-id custom-type="elpub" pub-id-type="custom">actabiomedica-3563</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>Роль алармона (p)ppGpp в регуляции образования индола клетками  Escherichia coli  в зависимости от содержания глюкозы</article-title><trans-title-group xml:lang="en"><trans-title>Role of alarmone (p)ppGpp in the regulation of indole formation depending on glucose content in  Escherichia coli</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3751-8156</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кашеварова</surname><given-names>Н. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Kashevarova</surname><given-names>N. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p> младший научный сотрудник лаборатории адаптации микроорганизмов</p><p> 614081, г. Пермь, ул. Голева, 13, Россия </p></bio><bio xml:lang="en"><p> Junior Research Officer at the Laboratory of Microbial Adaptation </p><p>Goleva str. 13, Perm 614081, Russian Federation </p></bio><email xlink:type="simple">nkashev@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3477-750X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ахова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Akhova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p> кандидат биологических наук, научный сотрудник лаборатории адаптации микроорганизмов</p><p> 614081, г. Пермь, ул. Голева, 13, Россия </p></bio><bio xml:lang="en"><p> Cand. Sc. (Biol.), Research Officer at the Laboratory of Microbial Adaptation </p><p>Goleva str. 13, Perm 614081, Russian Federation </p></bio><email xlink:type="simple">akhovan@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4457-2652</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хаова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khaova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p> лаборант лаборатории адаптации микроорганизмов</p><p> 614081, г. Пермь, ул. Голева, 13, Россия </p></bio><bio xml:lang="en"><p> Laboratory Assistant at the Laboratory of Microbial Adaptation </p><p>Goleva str. 13, Perm 614081, Russian Federation </p></bio><email xlink:type="simple">akkuzina-elena510@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8631-8583</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ткаченко</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Tkachenko</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p> доктор медицинских наук, заведующий лабораторией адаптации микроорганизмов</p><p> 614081, г. Пермь, ул. Голева, 13, Россия </p></bio><bio xml:lang="en"><p> Dr. Sc. (Med.), Head of the Laboratory of Microbial Adaptation </p><p> Goleva str. 13, Perm 614081, Russian Federation </p></bio><email xlink:type="simple">agtkachenko@iegm.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>«Институт экологии и генетики микроорганизмов УрО РАН» – филиал ФГБУН Пермского федерального исследовательского центра УрО РАН</institution></aff><aff xml:lang="en"><institution>Institute of Ecology and Genetics of Microorganisms, Ural Branch Russian Academy of Sciences</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>05</day><month>07</month><year>2022</year></pub-date><volume>7</volume><issue>3</issue><fpage>162</fpage><lpage>168</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кашеварова Н.М., Ахова А.В., Хаова Е.А., Ткаченко А.Г., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Кашеварова Н.М., Ахова А.В., Хаова Е.А., Ткаченко А.Г.</copyright-holder><copyright-holder xml:lang="en">Kashevarova N.M., Akhova A.V., Khaova E.A., Tkachenko A.G.</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/3563">https://www.actabiomedica.ru/jour/article/view/3563</self-uri><abstract><p>Сигнальные молекулы индол (продукт катаболизма триптофана) и (p)ppGpp (регулятор стринджент-ответа) принимают участие в регуляции физиологических процессов, направленных на адаптацию бактериальных клеток к антибиотикам и стрессам. Однако вопрос о существовании связи между стринджент-ответом и индукцией синтеза индола требует более детального изучения.Цель работы. Изучить влияние регулятора стринджент-ответа (p)ppGpp на продукцию индола клетками Escherichia coli в зависимости от содержания глюкозы в среде.Материалы и методы. В данной работе исследована динамика накопления индола в периодических культурах родительского штамма E. coli BW25141 ((p)ppGpp+ штамм) и делеционного мутанта BW25141∆relA∆spoT ((p)ppGpp0 штамм) в глюкозо-минеральной среде М9, не содержащей триптофана, а также с добавкой 2 мМ триптофана. С целью изучения эффекта стресса голодания на способность бактериальных клеток синтезировать индол использовали модель лимитирования роста углеродным субстратом при двух концентрациях глюкозы – 0,1 % и 0,4 %.Результаты. Показано, что отсутствие (p)ppGpp в клетках E. coli снижает их способность продуцировать индол в бестриптофановой среде и значительно замедляет скорость его накопления в среде, содержащей триптофан. Низкое содержание глюкозы (0,1 %) приводит к снижению образования индола клетками в среде, не содержащей триптофана. Наличие в среде предшественника синтеза индола триптофана, напротив, увеличивает продукцию индола в условиях добавки более низкой концентрации глюкозы как в (p)ppGpp+, так и в (p)ppGpp0 штаммах, демонстрируя прямую зависимость времени задержки начала образования индола от концентрации глюкозы, более выраженную в культуре мутанта, не способного к синтезу (p)ppGpp. Полученные данные интерпретируются нами как результат комплексного регуляторного воздействия механизма катаболитной репрессии и стринджент-ответа, вызванного действием алармона (p)ppGpp, на уровень экспрессии tnaCAB оперона, ответственного за биосинтез индола.</p></abstract><trans-abstract xml:lang="en"><p> Signaling molecules such as indole (product of tryptophan catabolism) and (p)ppGpp (stringent response regulator) are involved in regulation of physiological processes in bacterial cells aimed to adapt to antibiotics and stresses. However, question of existence of relationship between the stringent response and indole signaling requires more detailed investigation.The aim. To study effect of stringent response regulator (p)ppGpp on indole production in Escherichia coli depending on glucose content.Materials and methods. In this work, we studied the dynamics of indole accumulation in batch cultures of parent E. coli BW25141 ((p)ppGpp+ strain) and deletion mutant BW25141∆relA∆spoT ((p)ppGpp0 strain) in glucose-mineral tryptophan-free M9 medium, as well as with 2 mM tryptophan addition. In order to study effect of starvation stress on bacterial cell ability to synthesize indole, we used a model of growth limitation by carbon substrate at two glucose concentrations, 0.1 % and 0.4 %.Results. We have shown here that (p)ppGpp absence in E. coli cells reduces their ability to produce indole in the tryptophan-free medium and significantly slows down the rate of its accumulation in the tryptophan-containing one. Low glucose concentration (0.1 %) leads to decrease in indole production by (p)ppGpp+ cells in the tryptophan-free medium. The presence of indole synthesis precursor, tryptophan, in growth medium, on the contrary, increases the production of indole at lower glucose concentration in both (p)ppGpp+ and (p)ppGpp0 strains demonstrating direct dependence of delay time for onset of indole formation on glucose content, which is more pronounced in the culture of deletion mutant unable of synthesizing (p) ppGpp. The data obtained can be interpreted as result of complex regulatory effect of catabolic repression and the stringent response caused by alarmone (p)ppGpp action on expression level of tnaCAB operon responsible for indole biosynthesis.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>индол</kwd><kwd>(p)ppGpp</kwd><kwd>триптофан</kwd><kwd>триптофаназа</kwd><kwd>глюкоза</kwd><kwd>Escherichia coli</kwd><kwd>relA</kwd><kwd>spoT</kwd><kwd>адаптация</kwd></kwd-group><kwd-group xml:lang="en"><kwd>indole</kwd><kwd>(p)ppGpp</kwd><kwd>tryptophan</kwd><kwd>tryptophanase</kwd><kwd>glucose</kwd><kwd>Escherichia coli</kwd><kwd>relA</kwd><kwd>spoT</kwd><kwd>adaptation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Министерства науки и высшего образования РФ (АААА-А19-119112290009-1).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Kim J, Park W. 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