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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">10.21055/0370-1069-2023-3-118-122</article-id><article-id custom-type="elpub" pub-id-type="custom">microbe-1863</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>Изучение структуры липополисахаридного кластера в геномах штаммов Vibrio cholerae R-вариантов</article-title><trans-title-group xml:lang="en"><trans-title>Investigation of the Lipopolysaccharide Cluster Structure in the Genomes of Vibrio cholerae Rough Variants</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9996-4189</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Подойницына</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Podoinitsyna</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Подойницына Оксана Андреевна</p><p>Российская Федерация, 344002, Ростов-на-Дону, ул. М. Горького, 117/40</p></bio><bio xml:lang="en"><p>Oksana A. Podoinitsyna</p><p>117/40, M. Gor’kogo St., Rostov-on-Don, 344002, Russian Federation</p></bio><email xlink:type="simple">podoynitcina_oa@antiplague.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/0000-0002-6540-2778</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кругликов</surname><given-names>В. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Kruglikov</surname><given-names>V. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 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, Russian Federation</p></bio><email xlink:type="simple">plague@aaanet.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/0000-0002-4676-0377</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Левченко</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Levchenko</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 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, Russian Federation</p></bio><email xlink:type="simple">plague@aaanet.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/0000-0002-9056-3231</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Водопьянов</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Vodop’yanov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 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, Russian Federation</p></bio><email xlink:type="simple">plague@aaanet.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/0000-0003-4254-3313</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ежова</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Ezhova</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 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, Russian Federation</p></bio><email xlink:type="simple">plague@aaanet.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/0000-0003-0550-2221</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Носков</surname><given-names>А. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Noskov</surname><given-names>A. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 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, Russian Federation</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>2023</year></pub-date><pub-date pub-type="epub"><day>04</day><month>10</month><year>2023</year></pub-date><volume>0</volume><issue>3</issue><fpage>118</fpage><lpage>122</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Подойницына О.А., Кругликов В.Д., Левченко Д.А., Водопьянов А.С., Ежова М.И., Носков А.К., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Подойницына О.А., Кругликов В.Д., Левченко Д.А., Водопьянов А.С., Ежова М.И., Носков А.К.</copyright-holder><copyright-holder xml:lang="en">Podoinitsyna O.A., Kruglikov V.D., Levchenko D.A., Vodop’yanov A.S., Ezhova M.I., Noskov A.K.</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/1863">https://journal.microbe.ru/jour/article/view/1863</self-uri><abstract><p>При определении способности штаммов Vibrio cholerae агглютинироваться диагностическими холерными сыворотками возможны затруднения при отнесении вибрионов к той или иной серогруппе в случае отклонения культуры от типичных по агглютинабельности признаков. Изучение генетических детерминант, позволяющих установить серогруппу, является актуальной задачей при проведении мониторинга контаминации холерными вибрионами поверхностных водоемов.</p><p>Целью данной работы явилось сравнительное изучение структурной организации липополисахаридных кластеров (O-LPS) штаммов холерных вибрионов R-вариантов.</p><sec><title>Материалы и методы</title><p>Материалы и методы. Полногеномное секвенирование проведено на приборе Illumina MiSeq. Cборка осуществлялась de novo программой-сборщиком SPAdes (v. 3.11.1). Для поиска генов использовали программу blastn 2.5.0, для аннотирования входящих в кластеры генов – программу GeneMarkS. Поиск гомологичных участков проводили с помощью программы nucmer. Визуализация O-LPS-кластеров выполнена в программе SnapGene Viewer.</p></sec><sec><title>Результаты и обсуждение</title><p>Результаты и обсуждение. Кластеры генов, ответственных за биосинтез О-антигена, различались у разных штаммов V. Cholerae R-вариантов. Определено три типа O-LPS-кластеров, отличающихся размером и количеством входящих в их состав генов. Уникальных участков ДНК, общих для всей группы штаммов V. cholerae R-вариантов, обнаружить не удалось. Определены два гена, встречавшиеся у всех R-вариантов, но они не являются уникальными для этой группы штаммов и присутствуют также у представителей других серогрупп. Для двух типов кластеров обнаружен общий с V. cholerae O1 участок, содержащий IS-элемент.</p></sec></abstract><trans-abstract xml:lang="en"><p>Determination of Vibrio cholerae affiliation to one or another serogroup may meet some difficulties in cases of atypical agglutination with diagnostic cholera sera. The study of genetic determinants that allows for identifying a serogroup is a relevant task in monitoring of surface water body contamination with cholera vibrios.</p><p>The aim of the work was to compare the structural organization (quantitative and qualitative gene composition) of LPS clusters in V. cholerae rough variants.</p><sec><title>Materials and methods</title><p>Materials and methods. We used Illumina MiSeq for the whole genome sequencing; SPAdes software (version 3.11.1) for de novo assembly; and blastn (v. 2.5.0) for gene searching. GeneMarkS software was deployed for annotation of the genes incorporated in the clusters; nucmer – for searching homologous sites. Visualization of O-LPS clusters was carried out by means of SnapGene Viewer.</p></sec><sec><title>Results and discussion</title><p>Results and discussion. Strains of V. cholerae rough variants had diverse gene clusters responsible for O-antigen biosynthesis. We have identified three types of O-LPS clusters with different size and number of genes. Unique DNA sites, common to the whole group of V. cholerae rough variants, have not been detected. Two genes present in all rough strains have been defined, but they are not unique for this group of strains and can be found in representatives of other serogroups. For two types of clusters, a region containing the IS‑element, common with V. cholerae O1, has been revealed.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>Vibrio cholerae</kwd><kwd>R-вариант</kwd><kwd>липополисахаридный кластер</kwd><kwd>серогруппа</kwd><kwd>wbe</kwd><kwd>rfb.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Vibrio cholerae</kwd><kwd>R-variant</kwd><kwd>lipopolysaccharide cluster</kwd><kwd>serogroup</kwd><kwd>wbe</kwd><kwd>rfb</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">Cabral J.P. 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