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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">Microbiology</journal-id><journal-title-group><journal-title xml:lang="en">Microbiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Микробиология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0026-3656</issn><issn publication-format="electronic">3034-5464</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">698754</article-id><article-id pub-id-type="doi">10.7868/S3034546425060093</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>EXPERIMENTAL ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ЭКСПЕРИМЕНТАЛЬНЫЕ 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">Molecular Analysis of Phylogenetic Diversity of Halophilic Methylotrophic Bacterial Communities</article-title><trans-title-group xml:lang="ru"><trans-title>МОЛЕКУЛЯРНЫЙ АНАЛИЗ ФИЛОГЕНЕТИЧЕСКОГО РАЗНООБРАЗИЯ ГАЛОФИЛЬНЫХ МЕТИЛОТРОФНЫХ БАКТЕРИАЛЬНЫХ СООБЩЕСТВ<sup>1</sup></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shustova</surname><given-names>M. N.</given-names></name><name xml:lang="ru"><surname>Шустова</surname><given-names>М. Н.</given-names></name></name-alternatives><email>email@example.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kocharovskaya</surname><given-names>Yu. N.</given-names></name><name xml:lang="ru"><surname>Кочаровская</surname><given-names>Ю. Н.</given-names></name></name-alternatives><email>email@example.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Delegan</surname><given-names>Ya. A.</given-names></name><name xml:lang="ru"><surname>Делеган</surname><given-names>Я. А.</given-names></name></name-alternatives><email>email@example.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kaparullina</surname><given-names>E. N.</given-names></name><name xml:lang="ru"><surname>Капаруллина</surname><given-names>Е. Н.</given-names></name></name-alternatives><email>lenokap80@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Doronina</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Доронина</surname><given-names>Н. В.</given-names></name></name-alternatives><email>email@example.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences"</institution></aff><aff><institution xml:lang="ru">Институт биохимии и физиологии микроорганизмов им. Г.К. Скрябина Российской академии наук, Федеральный исследовательский центр “Пущинский научный центр биологических исследований Российской академии наук”</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Pushchino branch of the Federal State Budgetary Educational Institution of Higher Education "Russian Biotechnological University (ROSBIOTECH)"</institution></aff><aff><institution xml:lang="ru">Пущинский филиал федерального государственного бюджетного образовательного учреждения высшего образования “Российский биотехнологический университет (РОСБИОТЕХ)”</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Ivanovsky Academy of Biology and Biotechnology, Southern Federal University</institution></aff><aff><institution xml:lang="ru">Южный Федеральный университет, Академия биологии и биотехнологии им. Д.И. Ивановского</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-12-16" publication-format="electronic"><day>16</day><month>12</month><year>2025</year></pub-date><volume>94</volume><issue>6</issue><issue-title xml:lang="en">VOL 94, NO6 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 94, №6 (2025)</issue-title><fpage>594</fpage><lpage>604</lpage><history><date date-type="received" iso-8601-date="2025-12-16"><day>16</day><month>12</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-12-16"/></permissions><self-uri xlink:href="https://snv63.ru/0026-3656/article/view/698754">https://snv63.ru/0026-3656/article/view/698754</self-uri><abstract xml:lang="en"><p>The composition of four stable halophilic methylotrophic bacterial communities (3Sol, GBL, SBL, 8sh_L) formed in laboratory conditions as a result of long-term periodic cultivation on a mineral medium with methanol of water samples from salt lakes Dunino (Orenburg oblast), Bolshoe Medvezhye, and Maloe Medvezhye (Kurgan oblast), as well as the Indian Ocean, was studied by the 16S rRNA gene metabarcoding method. Bioinformatics analysis was used to obtain 35892 reads, which were grouped into 105 amplified sequence variants (ASVs). It was shown that representatives of the family <italic>Methylophagaceae</italic>, methylotrophs of the genus <italic>Methylophaga</italic> prevailed in all four halophilic methylotrophic communities, and representatives of the family <italic>Halomonadaceae</italic>, bacteria of the genera <italic>Vreelandella</italic> and <italic>Halomonas</italic> prevailed among the associated halophilic heterotrophic microorganisms. Methylotrophic strains of the studied communities were represented by uncultured bacteria, probably metabolically associated with heterotrophs. The strain <italic>Vreelandella titanicae</italic> was isolated from the 3Sol methylotrophic community and studied in an artificial association with the methylotroph <italic>Methylophaga marina</italic> VKM B-2056<sup>T</sup>.</p></abstract><trans-abstract xml:lang="ru"><p>Методом метабаркодирования генов 16S рРНК исследован состав четырех устойчивых галофильных метилотрофных бактериальных сообществ (3Sol, GBL, SBL, 8sh_L), сформировавшихся в лабораторных условиях в результате длительного периодического культивирования на минеральной среде с метанолом образцов вод соленых озер — Дунино (Оренбургская область), Большого Медвежьего и Малого Медвежьего (Курганская область), а также Индийского океана. С помощью биоинформатического анализа получено 35892 прочтения, которые были сформированы в 105 амплифицированных вариантов последовательностей (ASVs). Показано, что во всех четырех галофильных метилотрофных сообществах преобладали представители семейства <italic>Methylophagaceae</italic>, метилотрофы рода <italic>Methylophaga</italic>, а среди ассоциированных с ними галофильных гетеротрофных микроорганизмов преобладали представители семейства <italic>Halomonadaceae</italic>, бактерии родов <italic>Vreelandella</italic> и <italic>Halomonas</italic>. Метилотрофные штаммы исследуемых сообществ представлены некультивируемыми бактериями, вероятно, метаболически связанными с гетеротрофами. Из сообщества 3Sol выделен штамм <italic>Vreelandella titanicae</italic>, который изучен в искусственной ассоциации с метилотрофом <italic>Methylophaga marina</italic> BKM B-2056<sup>T</sup>.</p></trans-abstract><kwd-group xml:lang="en"><kwd>methylotrophs</kwd><kwd>heterotrophs</kwd><kwd>halophilic methylotrophic communities</kwd><kwd>metabarcoding of 16S rRNA genes</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>метилотрофы</kwd><kwd>гетеротрофы</kwd><kwd>галофильные метилотрофные сообщества</kwd><kwd>метабаркодирование генов 16S рРНК</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was carried out within the framework of state assignment FMRM-2022-0019.</funding-statement><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания FMRM- 2022-0019.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Доронина Н.В., Торгонская М.Л., Федоров Д.Н., Троценко Ю.А. 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