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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestib</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной  академии наук Беларуси. Серия биологических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Biological Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1029-8940</issn><issn pub-type="epub">2524-230X</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1029-8940-2020-65-2-239-244</article-id><article-id custom-type="elpub" pub-id-type="custom">vestib-673</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group></article-categories><title-group><article-title>Создание штамма – продуцента бактериальной пуриннуклеозидфосфорилазы, слитой с человеческим аннексином А5</article-title><trans-title-group xml:lang="en"><trans-title>Creation of strain – producer of bacterial purine nucleoside phosphorylase fused with human annexin A5</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Булатовский</surname><given-names>А. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Bulatovski</surname><given-names>A. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Булатовский Алексей Борисович – мл. науч. сотрудник</p><p>ул. Купревича, 2, 220141, г. Минск</p></bio><bio xml:lang="en"><p>Аleksei B. Bulatovski – Junior researcher</p><p>2, Kuprevich Str., 220141, Minsk</p></bio><email xlink:type="simple">a.bulatovski@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зинченко</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Zinchenko</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зинченко Анатолий Иванович – член-корреспондент, д-р биол. наук, профессор, заведующий лабораторией</p><p>ул. Купревича, 2, 220141, г. Минск</p></bio><bio xml:lang="en"><p>Anatoliy I. Zinchenko – Corresponding Member, D. Sc. (Biol.), Professor, Head of the Laboratory</p><p>2, Kuprevich Str., 220141, Minsk</p></bio><email xlink:type="simple">zinch@mbio.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт микробиологии НАН Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Microbiology of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>16</day><month>05</month><year>2020</year></pub-date><volume>65</volume><issue>2</issue><fpage>239</fpage><lpage>244</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Булатовский А.Б., Зинченко А.И., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Булатовский А.Б., Зинченко А.И.</copyright-holder><copyright-holder xml:lang="en">Bulatovski A.B., Zinchenko A.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestibio.belnauka.by/jour/article/view/673">https://vestibio.belnauka.by/jour/article/view/673</self-uri><abstract><p>Бактериальная пуриннуклеозидфосфорилаза (ПНФаза), в отличие от ПНФазы млекопитающих, способна подвергать фосфоролитическому расщеплению аденозин и его производные с образованием свободных азотистых оснований. Это позволяет использовать ПНФазу бактерий (при условии решения проблемы доставки этого фермента или его гена в клетки-мишени) в качестве пролекарственной терапии рака. Кроме того, ПНФаза в ложе опухоли может разрушать внеклеточный аденозин, который, как известно, защищает раковые клетки от противоопухолевого иммунитета.</p><p>В результате проведенного исследования сконструирован новый штамм Escherichia coli, продуцирующий химерный белок, молекула которого состоит из гомологичной ПНФазы, слитой с человеческим аннексином А5 – белком, проявляющим сродство к раковым клеткам. Продуцирующая способность штамма – продуцента химерного белка «Аннексин-ПНФаза» в отношении ПНФазы, рассчитанная по результатам реакции фосфоролиза инозина, составила 10 200 ед/мл культуральной жидкости. Полученный штамм предназначен для создания технологии получения новых противоопухолевых препаратов.</p></abstract><trans-abstract xml:lang="en"><p>It is known that bacterial purine nucleoside phosphorylase (PNPase), unlike mammalian PNPase, is capable of phosphorolytic cleavage of adenosine and its derivatives to form free nitrogen bases. This makes it possible to use bacterial PNPase (provided the problem of delivering this enzyme or its gene to target cells is solved) as a prodrug therapy for cancer. In addition, PNPase in a tumor bed can destroy extracellular adenosine, which is known to protect cancer cells from antitumor immunity.</p><p>As a result of the study, a new strain of Escherichia coli was constructed, producing a chimeric protein whose molecule consists of a homologous PNPase fused to human annexin A5, a protein showing affinity for cancer cells.</p><p>The production capacity of the producer strain of the chimeric protein “Annexin-PNPase” with respect to PNPase calculated from the results of the inosine phosphorolysis reaction, was 10,200 units/ml of culture liquid. The obtained strain is intended for creation of a technology for obtaining new antitumor preparations.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>рекомбинантный штамм</kwd><kwd>химерный белок</kwd><kwd>человеческий аннексин А5</kwd><kwd>пуриннуклеозидфосфорилаза</kwd><kwd>Escherichia coli</kwd></kwd-group><kwd-group xml:lang="en"><kwd>recombinant strain</kwd><kwd>fusion protein</kwd><kwd>human annexin A5</kwd><kwd>purine nucleoside phosphorylase</kwd><kwd>Escherichia coli</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках задания 3.32 Государственной программы научных исследований «Микробные биотехнологии», 2016–2020 гг.</funding-statement><funding-statement xml:lang="en">The work was supported by the grant 3.32 from the Belarus State Research Program “Microbial Biotechnologies”, 2016–2020.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Expression, purification, and characterization of recombinant purine nucleoside phosphorylase from Escherichia coli / J. 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