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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">10636</article-id><article-id pub-id-type="doi">10.32607/20758251-2012-4-1-74-77</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">Conformational Differences between Active Angiotensins and Their Inactive Precursors</article-title><trans-title-group xml:lang="ru"><trans-title>Конформационные отличия активных ангиотензинов от их неактивных предшественников</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Solopova</surname><given-names>O. N.</given-names></name><name xml:lang="ru"><surname>Солопова</surname><given-names>O. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>solopova@msn.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Pozdnyakova</surname><given-names>L. P.</given-names></name><name xml:lang="ru"><surname>Позднякова</surname><given-names>Л. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>solopova@msn.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Varlamov</surname><given-names>N. E.</given-names></name><name xml:lang="ru"><surname>Варламов</surname><given-names>Н. E.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>solopova@msn.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bokov</surname><given-names>M. N.</given-names></name><name xml:lang="ru"><surname>Боков</surname><given-names>M. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>solopova@msn.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Morozkina</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Морозкина</surname><given-names>E. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>solopova@msn.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Yagudin</surname><given-names>Т. А.</given-names></name><name xml:lang="ru"><surname>Ягудин</surname><given-names>Т. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>solopova@msn.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sveshnikov</surname><given-names>P. G.</given-names></name><name xml:lang="ru"><surname>Свешников</surname><given-names>П. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>solopova@msn.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Russian Research Center for Molecular Diagnostics and Therapy</institution></aff><aff><institution xml:lang="ru">ОАО «Всероссийский научный центр молекулярной диагностики и лечения»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Bach Institute of Biochemistry, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт биохимии им. А.Н. Баха РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2012-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2012</year></pub-date><volume>4</volume><issue>1</issue><issue-title xml:lang="en">VOL 4, NO1 (2012)</issue-title><issue-title xml:lang="ru">ТОМ 4, №1 (2012)</issue-title><fpage>74</fpage><lpage>77</lpage><history><date date-type="received" iso-8601-date="2020-01-17"><day>17</day><month>01</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2012, Solopova O.N., Pozdnyakova L.P., Varlamov N.E., Bokov M.N., Morozkina E.V., Yagudin Т.А., Sveshnikov P.G.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2012, Солопова O.Н., Позднякова Л.П., Варламов Н.E., Боков M.Н., Морозкина E.В., Ягудин Т.А., Свешников П.Г.</copyright-statement><copyright-year>2012</copyright-year><copyright-holder xml:lang="en">Solopova O.N., Pozdnyakova L.P., Varlamov N.E., Bokov M.N., Morozkina E.V., Yagudin Т.А., Sveshnikov P.G.</copyright-holder><copyright-holder xml:lang="ru">Солопова O.Н., Позднякова Л.П., Варламов Н.E., Боков M.Н., Морозкина E.В., Ягудин Т.А., Свешников П.Г.</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/10636">https://actanaturae.ru/2075-8251/article/view/10636</self-uri><abstract xml:lang="en"><p>The peptide conformation in the context of a protein polypeptide chain is influenced by proximal amino acid residues. However, the mechanisms of this interference remain poorly understood. We studied the conformation of angiotensins 1, 2 and 3, which are produced naturally in a sequential fashion from a precursor protein angiotensinogen and contain an identical peptide core structure. Using the example of angiotensins 1, 2 and 3, it was shown that similar amino acid sequences may have significant conformational differences in various molecules. In order to assess the conformational changes, we developed a panel of high-affinity mouse monoclonal antibodies against angiotensins 1, 2 and 3 and studied their cross-reactivity in indirect and competitive ELISAs. It was found that the conformations of inactive angiotensin1 and the corresponding fragment of angiotensinogen are similar; the same is true for the conformations of active angiotensins 2 and 3, whereas the conformations of homologous fragments in the active and inactive angiotensins differ significantly.</p></abstract><trans-abstract xml:lang="ru"><p>Вопрос о влиянии аминокислотного окружения определенных участков белка на их конформацию остается малоизученным. На примере ангиотензинов 1, 2 и 3 - метаболитов ангиотензиногена, мы показали, что одни и те же аминокислотные последовательности в составе разных молекул могут иметь существенные конформационные различия. С этой целью получены высокоаффинные моноклональные антитела против ангиотензинов 1, 2 и 3 и изучена их кросс-реактивность между разными ангиотензинами и ангиотензиногеном. Сделан вывод о том, что конформации неактивных молекул - ангиотензина 1 и соответствующего участка ангиотензиногена - сходны между собой, конформации активных ангиотензинов 2 и 3 также сходны между собой, тогда как конформации гомологичных участков у активных и неактивных ангиотензинов существенно отличаются.</p></trans-abstract><kwd-group xml:lang="en"><kwd>peptides</kwd><kwd>conformation</kwd><kwd>angiotensins</kwd><kwd>angiotensinogen</kwd><kwd>monoclonal antibodies</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>пептиды</kwd><kwd>конформация</kwd><kwd>ангиотензины</kwd><kwd>ангиотензиноген</kwd><kwd>моноклональные антитела</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by the Government Contract No. 16.512.12.2012 “Creation of Producer Strains of Humanized Recombinant Fab Fragments against Tumor Necrosis Factor-Alpha and Active Precursors of Angiotensins”.</funding-statement><funding-statement xml:lang="ru">Работа выполнена в рамках Государственного контракта № 16.512.12.2012 «Создание штаммов-продуцентов рекомбинантных гуманизированных Fab-фрагментов к фактору некроза опухоли альфа и предшественникам активных ангиотензинов».</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Kohler G., Milstein C. // Nature. 1975. 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