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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">10520</article-id><article-id pub-id-type="doi">10.32607/20758251-2015-7-1-117-120</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Short communications</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Краткие сообщения</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">Recombinant α-NAcetylgalactosaminidase from Marine Bacterium-Modifying A Erythrocyte Antigens</article-title><trans-title-group xml:lang="ru"><trans-title>Рекомбинантная α-N-ацетилгалактозаминидаза морской бактерии, модифицирующая детерминанты А-эритроцитов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Balabanova</surname><given-names>L. A.</given-names></name><name xml:lang="ru"><surname>Балабанова</surname><given-names>Л. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>balaban@piboc.dvo.ru</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>Golotin</surname><given-names>V. А.</given-names></name><name xml:lang="ru"><surname>Голотин</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>balaban@piboc.dvo.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bakunina</surname><given-names>I. Yu.</given-names></name><name xml:lang="ru"><surname>Бакунина</surname><given-names>И. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>balaban@piboc.dvo.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Slepchenko</surname><given-names>L. V.</given-names></name><name xml:lang="ru"><surname>Слепченко</surname><given-names>Л. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>balaban@piboc.dvo.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Isakov</surname><given-names>V. V</given-names></name><name xml:lang="ru"><surname>Исаков</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>balaban@piboc.dvo.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Podvolotskaya</surname><given-names>A. B.</given-names></name><name xml:lang="ru"><surname>Подволоцкая</surname><given-names>A. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>balaban@piboc.dvo.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rasskazov</surname><given-names>V. А.</given-names></name><name xml:lang="ru"><surname>Рассказов</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>balaban@piboc.dvo.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">G.B. Elyakov Pacific Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Тихоокеанский институт биоорганической химии им. Г.Б. Елякова ДВО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Far Eastern Federal University</institution></aff><aff><institution xml:lang="ru">Дальневосточный федеральный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2015-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2015</year></pub-date><volume>7</volume><issue>1</issue><issue-title xml:lang="en">VOL 7, NO1 (2015)</issue-title><issue-title xml:lang="ru">ТОМ 7, №1 (2015)</issue-title><fpage>117</fpage><lpage>120</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 ©; 2015, Balabanova L.A., Golotin V.А., Bakunina I.Y., Slepchenko L.V., Isakov V.V., Podvolotskaya A.B., Rasskazov V.А.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2015, Балабанова Л.A., Голотин В.А., Бакунина И.Ю., Слепченко Л.В., Исаков В.В., Подволоцкая A.Б., Рассказов В.А.</copyright-statement><copyright-year>2015</copyright-year><copyright-holder xml:lang="en">Balabanova L.A., Golotin V.А., Bakunina I.Y., Slepchenko L.V., Isakov V.V., Podvolotskaya A.B., Rasskazov V.А.</copyright-holder><copyright-holder xml:lang="ru">Балабанова Л.A., Голотин В.А., Бакунина И.Ю., Слепченко Л.В., Исаков В.В., Подволоцкая A.Б., Рассказов В.А.</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/10520">https://actanaturae.ru/2075-8251/article/view/10520</self-uri><abstract xml:lang="en"><p>A plasmid based on pET-40b was constructed to synthesize recombinant α-N-acetylgalactosaminidase of the marine bacterium Arenibacter latericius KMM 426 T (α-AlNaGal) in Escherichia coli cells. The yield of α-Al-NaGal attains 10 mg/ml with activity of 49.7 ± 1.3 U at 16°C, concentration of inductor 2 mM, and cultivation for 12 h. Techniques such as anion exchange, metal affinity and gel filtration chromatography to purify α-AlNaGal were applied. α-AlNaGal is a homodimer with a molecular weight of 164 kDa. This enzyme is stable at up to 50°C with a temperature range optimum activity of 20-37°C. Furthermore, its activity is independent of the presence of metal ions in the incubation medium. 1H NMR spectroscopy revealed that α-AlNaGal catalyzes the hydrolysis of the O-glycosidic bond with retention of anomeric stereochemistry and possesses a mechanism of action identical to that of other glycoside hydrolases of the 109 family. α-AlNaGal reduces the serological activity of A erythrocytes at pH 7.3. This property of α-AlNaGal can potentially be used for enzymatic conversion of A and AB erythrocytes to blood group O erythrocytes.</p></abstract><trans-abstract xml:lang="ru"><p>На основе pET-40b сконструирована плазмида, определяющая синтез рекомбинантной α-N-ацетилгалактозаминидазы морской бактерии Arenibacter latericius KMM 426Т (α-AlNaGal) в клетках Escherichia coli. В условиях экспрессии при температуре 16оС, концентрации индуктора 0.2 мМ и культивирования в течение 12 ч выход α-AlNaGal достигает 10 мг/л с общей активностью 49.7 ± 1.3 U. Разработаны процедуры очистки α-AlNaGal с использованием анионообменной, металлоаффинной хроматографии и гель-фильтрации. α-AlNaGal представляет собой гомодимер с молекулярной массой 164 кДа, стабильна до 50°С с температурным оптимумом реакции при 20-37°С, и ее активность не зависит от присутствия ионов металлов в инкубационной среде. Методом Н-ЯМР-спектроскопии показано, что α-AlNaGal катализирует гидролиз О-гликозидной связи с сохранением стереохимической конфигурации аномерного атома и реализует механизм, характерный для семейства 109 гликозидгидролаз. α-AlNaGal снижает серологическую активность А-эритроцитов при рН 7.3, что делает ее в перспективе пригодной для конверсии А- и АВ- эритроцитов в эритроциты группы крови О.</p></trans-abstract><kwd-group xml:lang="en"><kwd>glycoside hydrolase GH109</kwd><kwd>Arenibacter latericius</kwd><kwd>1H NMR spectroscopy</kwd><kwd>conversion of A erythrocytes</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гликозидгидролаза GH109</kwd><kwd>Arenibacter latericius</kwd><kwd>1Н-ЯМР-спектроскопия</kwd><kwd>конверсия А-эритроцитов</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by the Russian Foundation for Basic Research (grant № 13-04-00806) and the Scientific Foundation of the Far Eastern Federal University (14-08-06-10_i).</funding-statement><funding-statement xml:lang="ru">Работа поддержана РФФИ (грант № 13-04-00806) и Научным фондом ДВФУ (14-08-06-10_и).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Vallée F., Karaveg K., Herscovics A., Moremen K.W., Howell P.L. // J. 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