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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</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">10.29235/1561-8323-2021-65-2-185-190</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-961</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>БИОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOLOGY</subject></subj-group></article-categories><title-group><article-title>Создание рекомбинантного штамма Escherichia coli, продуцирующего субъединицу гомологичного термолабильного токсина</article-title><trans-title-group xml:lang="en"><trans-title>Construction of the recombinant Escherichia coli strain producing a homologous thermolabile toxin subunit</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>Казловский</surname><given-names>И. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kazlouski</surname><given-names>I. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Казловский Илья Сергеевич , науч. сотрудник</p><p>ул. Купревича, 2, 220141, Минск</p></bio><bio xml:lang="en"><p>Kazlouski Illia S., Researcher</p><p>2, Kuprevich Str., 220141, Minsk</p></bio><email xlink:type="simple">kazlouski.illia@gmail.com</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, Минск</p></bio><bio xml:lang="en"><p>Zinchenko Anatoliy I, Corresponding Member, D. Sc. (Biology), 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 contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соловьева</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Solovyeva</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Соловьева Анастасия Владимировна, мл. науч. сотрудник</p><p>ул. Брикета, 28, 220063, Минск</p></bio><bio xml:lang="en"><p>Solovyeva Anastasiya V, Junior researcher</p><p>28, Briket Str., 220063, Minsk</p></bio><email xlink:type="simple">sol_nastasya@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Новикова</surname><given-names>О. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Novikova</surname><given-names>O. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Новикова Оксана Николаевна, канд. вет. наук, вед. науч. сотрудник</p><p>ул. Брикета, 28, 220063, Минск</p></bio><bio xml:lang="en"><p>Novikova Oksana N, Ph. D. (Veterinary Medicine), Leading researcher</p><p>28, Briket Str., 220063, Minsk</p></bio><email xlink:type="simple">oksana68on@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ломако</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lomako</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ломако Юрий Васильевич, канд. вет. наук, директор</p><p>ул. Брикета, 28, 220063, Минск</p></bio><bio xml:lang="en"><p>Lomako Yuri V, Ph. D. (Veterinary Medicine), Director</p><p>28, Briket Str., 220063, Minsk</p></bio><email xlink:type="simple">lamakajuri@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт микробиологии Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Microbiology of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт экспериментальной ветеринарии им. С. Н. Вышелесского</institution></aff><aff xml:lang="en"><institution>S. N. Vyshelessky Institute of Experimental Veterinary Medicine</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>08</day><month>05</month><year>2021</year></pub-date><volume>65</volume><issue>2</issue><fpage>185</fpage><lpage>190</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Казловский И.С., Зинченко А.И., Соловьева А.В., Новикова О.Н., Ломако Ю.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Казловский И.С., Зинченко А.И., Соловьева А.В., Новикова О.Н., Ломако Ю.В.</copyright-holder><copyright-holder xml:lang="en">Kazlouski I.S., Zinchenko A.I., Solovyeva A.V., Novikova O.N., Lomako Y.V.</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://doklady.belnauka.by/jour/article/view/961">https://doklady.belnauka.by/jour/article/view/961</self-uri><abstract><p>Колибактериоз – это остро протекающая зоонозная болезнь, проявляющаяся септицемией, токсемией, энтеритом, обезвоживанием организма и поражением центральной нервной системы. Энтеротоксигенные штаммы Escherichia coli занимают одно из ведущих мест в этиологической структуре колибактериоза телят во многих животноводческих хозяйствах Республики Беларусь. Основная причина, из-за которой развивается данная болезнь, это наличие термолабильных и термостабильных токсинов в штамме-возбудителе. Субъединица В термолабильного токсина является сильным антигеном, который позволяет домашним животным приобрести иммунитет против диареи крупного рогатого скота, вызванной E. coli. Многие зарубежные вакцины, используемые против кишечных инфекций крупного рогатого скота, содержат в себе либо нативный, либо рекомбинантный вариант субъединицы В. В результате выполнения работы нами создан новый штамм E. coli 42eLTB – продуцент рекомбинантной субъединицы В термолабильного токсина энтеротоксикогенного штамма E. coli. При этом продуцирующая способность полученного штамма составляет 480 мг с 1 л культуральной жидкости, что превышает аналогичный показатель уже известных штаммов в 1,37 раза.</p></abstract><trans-abstract xml:lang="en"><p>Colibacteriosis is an acute zoonotic disease manifested by septicaemia, toxemia, enteritis, body dehydration, and central nervous system damage. Depending on the presence of virulence factors and the nature of interaction with the intestinal mucosa, enterotoxigenic, enteroinvasive, enteropathogenic, and enterohemorrhagic E. coli are isolated. Enterotoxigenic strains of E. coli occupy one of the leading places in the etiological structure of calf colibacteriosis in many livestock farms of the Republic of Belarus. The main reason why this disease develops is the presence of thermolabile and thermostable toxins in the causative strain. The thermolabile toxin subunit B is a potent antigen that allows pet immunity to be acquired against E. coli-induced cattle diarrhea. Many foreign vaccines used against intestinal infections of cattle contain either a native or recombinant variant of the subunit B. As a result of the work, we have created a new strain of E. coli 42eLTB – the producer of the recombinant subunit B of the thermolabile toxin E. coli. The producing capacity of the obtained strain is 480 mg with 1 culture liquid liter, which exceeds the already known strains 1.37 times.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Escherichia coli</kwd><kwd>термолабильный токсин</kwd><kwd>колибактериоз</kwd><kwd>генная инженерия</kwd><kwd>рекомбинантный штамм</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Escherichia coli</kwd><kwd>thermolabile toxin</kwd><kwd>colibacteriosis</kwd><kwd>genetic engineering</kwd><kwd>recombinant strain</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Characterization of heat-labile toxin-subunit B from Escherichia coli by liquid chromatography-electrospray ionization-mass spectrometry and matrix-assisted laser desorption/ionization time-of-ﬂight mass spectrometry / I. Sospedra [et al.] // Food Chem. 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