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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">catal</journal-id><journal-title-group><journal-title xml:lang="ru">Катализ в промышленности</journal-title><trans-title-group xml:lang="en"><trans-title>Kataliz v promyshlennosti</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1816-0387</issn><issn pub-type="epub">2413-6476</issn><publisher><publisher-name>LLC "KALVIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18412/1816-0387-2019-5-399-407</article-id><article-id custom-type="elpub" pub-id-type="custom">catal-649</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>БИОКАТАЛИЗ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOCATALYSIS</subject></subj-group></article-categories><title-group><article-title>Термостабильная эстераза estUT1 бактерии Ureibacillus thermosphaericus: влияние дополнительного процессируемого домена TrxA на свойства фермента</article-title><trans-title-group xml:lang="en"><trans-title>Thermostable esterase estUT1 of bacteria Ureibacillus thermosphaericus: the influence of additional processed domain TrxA on enzyme properties</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>Сорокина</surname><given-names>К. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Sorokina</surname><given-names>K. N.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.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>Самойлова</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Samoilova</surname><given-names>Yu. V.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.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>Пармон</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Parmon</surname><given-names>V. N.</given-names></name></name-alternatives><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт катализа им. Г.К. Борескова СО РАН, Новосибирск</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Boreskov Institute of Catalysis, Novosibirsk</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>19</day><month>09</month><year>2019</year></pub-date><volume>19</volume><issue>5</issue><fpage>399</fpage><lpage>407</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; LLC "KALVIS", 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">LLC "KALVIS"</copyright-holder><copyright-holder xml:lang="en">LLC "KALVIS"</copyright-holder><license xlink:href="https://www.catalysis-kalvis.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.catalysis-kalvis.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.catalysis-kalvis.ru/jour/article/view/649">https://www.catalysis-kalvis.ru/jour/article/view/649</self-uri><abstract><p>Ген термостабильной эстеразы бактерии Ureibacillus thermosphaericus был экспрессирован в штамме E. coli BL21(DE3) в составе генетической конструкции pET32b-estUT1, содержащей домен TrxA, под контролем Т7-промотора. Удельная активность и относительная термостабильность полученного таким образом рекомбинантного фермента увеличилась от 45,2 до 65,8 % (инкубация 1 ч при 70 °С). Обнаружено, что дополнительный домен TrxA не оказывает заметного влияния на рН оптимум активности фермента и его субстратную специфичность. В то же время отсутствие домена TrxA обусловливает значительное увеличение стабильности estUT1 в присутствии различных химических веществ, включая этанол и метанол. Максимальная каталитическая эффективность (kcat /KM) для эстеразы зарегестрирована в отсутствие домена TrxA и составила 280,0 с–1·мМ–1. Таким образом, введение дополнительного процессируемого домена TrxA, с одной стороны, позволяет секретировать фермент в растворенном виде, но, с другой, снижает термостабильность целевого белка.</p></abstract><trans-abstract xml:lang="en"><p>A gene of thermostable esterase of bacteria Ureibacillus thermosphaericus was expressed in strain E. coli BL21(DE3) comprised in domain TrxA-containing genetic construct pET32b-estUT1, under the control T7-promoter. The specific activity and relative thermostability of thus produced recombinant enzyme increased from 54.2 to 65.8 % (an hour incubation at 70 °C). The additional domain TrxA was discovered not to affect noticeably the pH optimum of the enzyme activity and its substrate specificity. In the absence of domain TrxA, the stability of estUT1 increased considerably in the presence of various chemicals including ethanol and methanol. The maximal catalytic activity (kcat/KM) of esterase equal to 280.0 s–1·mM–1 was observed in the absence of domain TrxA. Thus, introduction of an additional processed domain TrxA allows the enzyme to be secreted in the dissolved form but, on the other hand, the target protein becomes less thermostable.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>эстераза</kwd><kwd>Ureibacillus thermosphaericus</kwd><kwd>TrxA</kwd><kwd>термостабильность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>esterase</kwd><kwd>Ureibacillus thermosphaericus</kwd><kwd>TrxA</kwd><kwd>thermostability</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">López-López O., Cerdán M.E., González Siso M.I. // Current Protein &amp; Peptide Science. 2014. V. 15. № 5. 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