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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">Ecological genetics</journal-id><journal-title-group><journal-title xml:lang="en">Ecological genetics</journal-title><trans-title-group xml:lang="ru"><trans-title>Экологическая генетика</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1811-0932</issn><issn publication-format="electronic">2411-9202</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">10488</article-id><article-id pub-id-type="doi">10.17816/ecogen17313-22</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Genetic basis of ecosystems evolution</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Генетические основы эволюции экосистем</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">Diversity of the gene of benzoate dioxygenase in bacterial associations isolated from long term organochlorine-contaminated soils</article-title><trans-title-group xml:lang="ru"><trans-title>Разнообразие гена бензоат диоксигеназы в бактериальных ассоциациях, сформировавшихся под давлением хлорорганического загрязнения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nazarova</surname><given-names>Elmira A.</given-names></name><name xml:lang="ru"><surname>Назарова</surname><given-names>Эльмира Алиевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Postgraduate Student, Laboratory of Molecular Microbiology and Biotechnology</p></bio><bio xml:lang="ru"><p>аспирант, лаборатория молекулярной микробиологии и биотехнологии</p></bio><email>e9026309777@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kiryanova</surname><given-names>Tatyana D.</given-names></name><name xml:lang="ru"><surname>Кирьянова</surname><given-names>Татьяна Денисовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Undergraduate, Biological Faculty</p></bio><bio xml:lang="ru"><p>магистрант, биологический факультет</p></bio><email>kitadi@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8018-4687</contrib-id><contrib-id contrib-id-type="scopus">36622279600</contrib-id><contrib-id contrib-id-type="spin">9450-7883</contrib-id><name-alternatives><name xml:lang="en"><surname>Egorova</surname><given-names>Daria O.</given-names></name><name xml:lang="ru"><surname>Егорова</surname><given-names>Дарья Олеговна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Biological Sciences), Associate Professor, Senior Researcher of the Laboratory of Molecular Microbiology and Biotechnology "IEGM UB RAS"</p></bio><bio xml:lang="ru"><p>кандидат биологических наук, доцент, старший научный сотрудник лаборатории молекулярной микробиологии и биотехнологии "ИЭГМ УрО РАН"</p></bio><email>daryao@rambler.ru</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Ecology and Genetics of Microorganisms, Ural Branch of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">«Институт экологии и генетики микроорганизмов Уральского отделения Российской академии наук» - филиал Федерального государственного бюджетного учреждения науки Пермского федерального исследовательского центра Уральского отделения Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Perm State University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВПО Пермский государственный национальный исследовательский университет</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Federal State Budget Establishment of Science Institute of Ecology and Genetics of Microorganisms, Ural Branch of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">«Институт экологии и генетики микроорганизмов Уральского отделения Российской академии наук» - филиал Федерального государственного бюджетного учреждения науки Пермского федерального исследовательского центра Уральского отделения Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en"> Perm State University</institution></aff><aff><institution xml:lang="ru"> ФГБОУ ВПО Пермский государственный национальный исследовательский университет</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2019-05-20" publication-format="electronic"><day>20</day><month>05</month><year>2019</year></pub-date><pub-date date-type="pub" iso-8601-date="2019-09-15" publication-format="electronic"><day>15</day><month>09</month><year>2019</year></pub-date><volume>17</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>13</fpage><lpage>22</lpage><history><date date-type="received" iso-8601-date="2018-11-21"><day>21</day><month>11</month><year>2018</year></date><date date-type="accepted" iso-8601-date="2019-05-20"><day>20</day><month>05</month><year>2019</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Nazarova E.A., Kiryanova T.D., Egorova D.O.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Назарова Э.А., Кирьянова Т.Д., Егорова Д.О.</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Nazarova E.A., Kiryanova T.D., Egorova D.O.</copyright-holder><copyright-holder xml:lang="ru">Назарова Э.А., Кирьянова Т.Д., Егорова Д.О.</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/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/ecolgenet/article/view/10488">https://journals.eco-vector.com/ecolgenet/article/view/10488</self-uri><abstract xml:lang="en"><p><bold>Background.</bold> Communities of bacteria with specific enzymes are formed in the soil with long-term organochlorine contamination.</p> <p><bold>The aim</bold> of this study was to analyze the diversity of the <italic>benA</italic> gene encoding the α-subunit of the benzoate 1,2-dioxygenase in aerobic bacterial associations isolated from the soils of the Chapayevsk-city (Samara region, Russia).</p> <p><bold>Materials and methods.</bold> The soil samples were taken on the territory, contaminated with organochlorine compounds for a long time. As a selection factor in the enrichment cultures were used 4-chlorobenzoic acid and chlorobenzene, in the pure cultures – benzoic acid. The isolation of total DNA from bacterial associations was performed using a commercial FastDNA Spin Kit for Soil kit (USA). Amplification was performed on a MyCycler instrument (USA). Determination of the nucleotide sequence was performed on an automatic sequencer Genetic Analyzer 3500XL (USA). The search and analysis for <italic>benA</italic> gene homologs was carried out using international GenBank databases and BLAST system (<ext-link ext-link-type="uri" xlink:href="http://www.ncbi.nlm.nih.gov">http://www.ncbi.nlm.nih.gov</ext-link>).</p> <p><bold>Results.</bold> As a result of selection, 12 associations of aerobic bacteria were obtained. Fragments of the <italic>benA</italic> gene (α-subunit of benzoate dioxygenase) were obtained with the total DNA of six bacterial associations selected on chlorobenzene and with the total DNA of three bacterial associations selected on 4-chlorobenzoate. Pure cultures of aerobic bacterial strains using benzoic acid as a carbon source were isolated from <italic>benA</italic>-positive associations. It was established that the amplified fragments with the DNA of the A1, A4, A5, B1, B2, B3, B4 and B6 association strains form a single phylogenetic cluster with the α-subunit gene of the benzoate dioxygenase of the <italic>Pseudomonas putida </italic>strain KT2440 (level of similarity is 96–98%). The amplified fragment with the DNA of strain B5-170 (association B5) forms a cluster with the gene of the α-subunit of the benzoate dioxygenase of the strain <italic>Pseudomonas</italic> sp. VLB120 (93% similarity).</p></abstract><trans-abstract xml:lang="ru"><p>Из образцов грунта, отобранных на территории, длительное время загрязненной хлорорганическими соединениями, в результате селекции получены 12 ассоциаций аэробных бактерий. В качестве фактора отбора при накопительном культивировании использовали 4-хлорбензойную кислоту и хлорбензол. В результате скрининга установлено, что в ДНК шести бактериальных ассоциаций, селектированных на хлорбензоле, и в ДНК трех бактериальных ассоциаций, селектированных на 4-хлорбензоате, присутствует ген <italic>benA</italic> (α-субъединица бензоат 1,2-диоксигеназы). Из <italic>benA</italic>-положительных ассоциаций выделены чистые культуры аэробных бактериальных штаммов, использующих бензойную кислоту в качестве источника углерода. Установлено, что амплифицированные фрагменты с ДНК штаммов ассоциаций А1, А4, А5, В1, В2, В3, В4 и В6 формируют единый филогенетический кластер с геном α-субъединицы бензоат диоксигеназы штамма <italic>Pseudomonas putida</italic> KT2440 (уровень сходства 96–98 %), тогда как амплифицированный фрагмент с ДНК штамма В5-170 ассоциация В5 формирует кластер с геном α-субъединицы бензоат диоксигеназы штамма <italic>Pseudomonas</italic> sp. VLB120 (уровень сходства 93 %).</p></trans-abstract><kwd-group xml:lang="en"><kwd>benzoate dioxygenase</kwd><kwd>gene</kwd><kwd>strain</kwd><kwd>bacterial associations</kwd><kwd>chloroaromatic compounds</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>бензоат диоксигеназа</kwd><kwd>ген</kwd><kwd>штамм</kwd><kwd>бактериальные ассоциации</kwd><kwd>хлорароматические соединения</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Government task</institution></institution-wrap><institution-wrap><institution xml:lang="ru">Государственное задание</institution></institution-wrap></funding-source><award-id></award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Трегер Ю. СОЗ — стойкие и опасные // The Chemical Journal. – 2013. – № 1. – С. 30–34. [Treger U. POPs – persistent and dangerous. The Chemical Journal. 2013(1):30-34. 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