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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">10560</article-id><article-id pub-id-type="doi">10.32607/20758251-2014-6-2-106-109</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">Optimization of the Protocol for the Isolation and Refolding of the Extracellular Domain of HER2 Expressed in Escherichia coli</article-title><trans-title-group xml:lang="ru"><trans-title>Оптимизация схемы выделения и рефолдинга внеклеточного домена HER2, экспрессированного в клетках</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dolgikh</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Долгих</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vtetzv@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Senderskiy</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Сендерский</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vtetzv@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tetz</surname><given-names>G. V.</given-names></name><name xml:lang="ru"><surname>Тец</surname><given-names>Г. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vtetzv@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tetz</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Тец</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vtetzv@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Department of Microbiology, Virology and Immunology, First Pavlov State Medical University of Saint Petersburg</institution></aff><aff><institution xml:lang="ru">Первый Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова Министерства здравоохранения РФ</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2014-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2014</year></pub-date><volume>6</volume><issue>2</issue><issue-title xml:lang="en">VOL 6, NO2 (2014)</issue-title><issue-title xml:lang="ru">ТОМ 6, №2 (2014)</issue-title><fpage>106</fpage><lpage>109</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 ©; 2014, Dolgikh V.V., Senderskiy I.V., Tetz G.V., Tetz V.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2014, Долгих В.В., Сендерский И.В., Тец Г.В., Тец В.В.</copyright-statement><copyright-year>2014</copyright-year><copyright-holder xml:lang="en">Dolgikh V.V., Senderskiy I.V., Tetz G.V., Tetz V.V.</copyright-holder><copyright-holder xml:lang="ru">Долгих В.В., Сендерский И.В., Тец Г.В., Тец В.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/10560">https://actanaturae.ru/2075-8251/article/view/10560</self-uri><abstract xml:lang="en"><p>Receptor 2 of the human epidermal growth factor (HER2/neu, c-erbB2) is a 185 kDa proto-oncogene protein characterized by an overexpression in some oncological diseases, including 30% of mammary glands cancers, as well as tumors in the ovary, stomach and other organs of the human body. Since HER2- tumor status testing is the essential part of a successful cancer treatment, the expression and purification of substantial amounts of the extracellular domain (ECD) of HER2 is an important task. The production of ECD HER2 in Escherichia coli has several advantages over the use of eukaryotic expression systems, but the bulk of the recombinant product in bacteria accumulates as insoluble protein inclusion bodies. In this study, we obtained ECD HER2 in Escherichia coli as insoluble inclusion bodies and elaborated a simple, efficient, and fast protocol for the solubilization, refolding, and isolation of the protein in soluble form.</p></abstract><trans-abstract xml:lang="ru"><p>Рецептор-2 эпидермального ростового фактора человека (HER2/neu, c-erbB2) является протоонкогенным белком размером 185 кДа, характеризующимся гиперэкспрессией при ряде онкологических заболеваний, включающих 30% случаев рака молочной железы. Иммунодиагностика HER2-статуса опухоли имеет большое значение для успешной борьбы с заболеванием, в связи с чем получение значительных количеств экстраклеточного домена (ECD) HER2 остается весьма актуальной задачей. Наработка ECD HER2 в <italic>Escherichia coli</italic> имеет ряд преимуществ по сравнению с использованием эукариотических систем экспрессии, однако большая часть рекомбинантного продукта накапливается в бактериях в виде нерастворимых белковых включений. В данной работе мы осуществили эффективную наработку ECD HER2 в <italic>E. coli</italic> в виде нерастворимых белковых включений и предложили простую, эффективную и быстровыполнимую схему солюбилизации, рефолдинга и выделения белка в растворимой форме.</p></trans-abstract><kwd-group xml:lang="en"><kwd>epidermal growth factor receptor</kwd><kwd>extracellular domain</kwd><kwd>bacterial expression</kwd><kwd>refolding</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>бактериальная экспрессия</kwd><kwd>рефолдинг</kwd><kwd>рецептор эпидермального фактора роста</kwd><kwd>экстраклеточный домен</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by the Russian Foundation for Basic Research (grant № 12-08-01086-a).</funding-statement><funding-statement xml:lang="ru">Работа поддержана РФФИ (грант № 12-08-01086-а).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Coussens L., Yang-Feng T.L., Liao Y.C., Chen E., Gray A., McGrath J., Seeburg P.H., Libermann T.A., Schlessinger J., Francke U. // Tyrosine kinase receptor with extensive homology to EGF receptor shares chromosomal location with neu oncogene. // Science. 1985, V.230, P.1132-1139</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>[2] Marmor M.D., Skaria K.B., Yarden Y. // Signal transduction and oncogenesis by ErbB/HER receptors. // Int. 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