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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">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">27338</article-id><article-id pub-id-type="doi">10.32607/actanaturae.27338</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research 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">The Effect of Calcium Ions on the Electrophysiological Properties of Single ANO6 Channels</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние ионов кальция на электрофизиологические свойства одиночных каналов ANO6</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kolesnikov</surname><given-names>D. O.</given-names></name><name xml:lang="ru"><surname>Колесников</surname><given-names>Д. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>shalygin.alexey@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Grigorieva</surname><given-names>E. R.</given-names></name><name xml:lang="ru"><surname>Григорьева</surname><given-names>Е. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>shalygin.alexey@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nomerovskaya</surname><given-names>M. A.</given-names></name><name xml:lang="ru"><surname>Номеровская</surname><given-names>М. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>shalygin.alexey@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Reshetin</surname><given-names>D. S.</given-names></name><name xml:lang="ru"><surname>Решетин</surname><given-names>Д. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>shalygin.alexey@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shalygin</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Шалыгин</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>shalygin.alexey@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kaznacheyeva</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Казначеева</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>evkazn@incras.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Cytology of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт цитологии РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-05-10" publication-format="electronic"><day>10</day><month>05</month><year>2024</year></pub-date><volume>16</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>40</fpage><lpage>47</lpage><history><date date-type="received" iso-8601-date="2023-12-04"><day>04</day><month>12</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2024-02-12"><day>12</day><month>02</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Kolesnikov D.O., Grigorieva E.R., Nomerovskaya M.A., Reshetin D.S., Shalygin A.V., Kaznacheyeva E.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Колесников Д.О., Григорьева Е.Р., Номеровская М.А., Решетин Д.С., Шалыгин А.В., Казначеева Е.В.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Kolesnikov D.O., Grigorieva E.R., Nomerovskaya M.A., Reshetin D.S., Shalygin A.V., Kaznacheyeva E.V.</copyright-holder><copyright-holder xml:lang="ru">Колесников Д.О., Григорьева Е.Р., Номеровская М.А., Решетин Д.С., Шалыгин А.В., Казначеева Е.В.</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://actanaturae.ru/2075-8251/article/view/27338">https://actanaturae.ru/2075-8251/article/view/27338</self-uri><abstract xml:lang="en"><p>Proteins belonging to the anoctamin (ANO) family form calcium-activated chloride channels (CaCCs). The most unusual member of this family, ANO6 (TMEM16F), simultaneously exhibits the functions of calcium-dependent scramblase and the ion channel. ANO6 affects the plasma membrane dynamics and phosphatidylserine transport; it is also involved in programmed cell death. The properties of ANO6 channels remain the subject of debate. In this study, we investigated the effect of variations in the intracellular and extracellular concentrations of calcium ions on the electrophysiological properties of endogenous ANO6 channels by recording single ANO6 channels. It has been demonstrated that (1) a high calcium concentration in an extracellular solution increases the activity of endogenous ANO6 channels, (2) the permeability of endogenous ANO6 channels for chloride ions is independent of the extracellular concentration of calcium ions, (3) that an increase in the intracellular calcium concentration leads to the activation of endogenous ANO6 channels with double amplitude, and (4) that the kinetics of the channel depend on the plasma membrane potential rather than the intracellular concentration of calcium ions. Our findings give grounds for proposing new mechanisms for the regulation of the ANO6 channel activity by calcium ions both at the inner and outer sides of the membrane.</p></abstract><trans-abstract xml:lang="ru"><p>Белки семейства аноктаминов (ANO) формируют кальций-зависимые хлорные каналы (CaCC). Наиболее необычный представитель этого семейства – ANO6 (TMEM16F) – совмещает в себе функции кальций-зависимой скрамблазы и ионного канала. ANO6 влияет на динамику плазматической мембраны, перенос фосфатидилсерина и участвует в программируемой клеточной гибели. Свойства каналов ANO6 остаются предметом дискуссии. В настоящей работе, регистрируя одиночные каналы ANO6, мы изучили влияние изменений внутриклеточной и наружной концентрации ионов кальция на электрофизиологические свойства эндогенных каналов ANO6. Показано, что (1) высокая концентрация ионов кальция во внеклеточном растворе увеличивает активность эндогенных каналов ANO6; (2) проницаемость эндогенных каналов ANO6 по отношению к хлорид-ионам не зависит от внеклеточной концентрации ионов кальция; (3) увеличение внутриклеточной концентрации кальция приводит к активации эндогенных каналов ANO6 с двойной амплитудой; (4) кинетика работы канала зависит от потенциала плазматической мембраны, но не от внутриклеточной концентрации ионов кальция. Полученные нами данные дают возможность предложить новые механизмы регуляции активности каналов ANO6 ионами кальция как с внутренней, так и с наружной стороны мембраны.</p></trans-abstract><kwd-group xml:lang="en"><kwd>ANO6</kwd><kwd>TMEM16F</kwd><kwd>calcium-activated chloride channels</kwd><kwd>patch-clamp technique</kwd><kwd>recording currents through single channels</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ANO6</kwd><kwd>TMEM16F</kwd><kwd>кальций-зависимые хлорные каналы</kwd><kwd>метод локальной фиксации потенциала</kwd><kwd>регистрация токов через одиночные каналы</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">РНФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>22-24-00761</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Ehlen H.W.A., Chinenkova M., Moser M., Munter H.M., Krause Y., Gross S., Brachvogel B., Wuelling M., Kornak U., Vortkamp A. // J. 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