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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">biob</journal-id><journal-title-group><journal-title xml:lang="ru">Биобезопасность и Биотехнология</journal-title><trans-title-group xml:lang="en"><trans-title>Biosafety and Biotechnology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2707-7241</issn><issn pub-type="epub">2957-5702</issn><publisher><publisher-name>Научно-исследовательский институт проблем биологической безопасности</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.58318/2957-5702-2026-26-52-60</article-id><article-id custom-type="elpub" pub-id-type="custom">biob-257</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><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>ОПТИМИЗАЦИЯ УСЛОВИЙ РЕФОЛДИНГА РЕКОМБИНАНТНОГО БЕЛКА OMP19 BRUCELLA SPP.</article-title><trans-title-group xml:lang="en"><trans-title>OPTIMIZATION OF REFOLDING CONDITIONS FOR RECOMBINANT OMP19 PROTEIN FROM BRUCELLA SPP.</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>Адилова</surname><given-names>Г. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Adilova</surname><given-names>G. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Әділова Гауһар Сәтқызы, младший научный сотрудник</p><p>Гвардейский </p></bio><bio xml:lang="en"><p>Guardeyskiy </p></bio><email xlink:type="simple">g.adilova@biosafety.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7954-6246</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Червякова</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Chervyakova</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Червякова Ольга Викторовна, кандидат биологических наук, профессор, главный научный сотрудник</p><p>Гвардейский </p></bio><bio xml:lang="en"><p>Guardeyskiy </p></bio><email xlink:type="simple">o.chervyakova@biosafety.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5623-7571</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Исабек</surname><given-names>А. У.</given-names></name><name name-style="western" xml:lang="en"><surname>Issabek</surname><given-names>A. U.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Исабек Айша Ұранқызы, магистр естественных наук, старший научный сотрудник</p><p>Гвардейский </p></bio><bio xml:lang="en"><p>Guardeyskiy </p></bio><email xlink:type="simple">a.issabek@biosafety.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9480-0241</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бопи</surname><given-names>А. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Bopi</surname><given-names>A. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бопи Арайлым Құралбекқызы, магистр химических наук, научный сотрудник</p><p>Гвардейский </p></bio><bio xml:lang="en"><p>Guardeyskiy </p></bio><email xlink:type="simple">a.bopi@biosafety.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6976-1540</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шыныбекова</surname><given-names>Г. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Shynybekova</surname><given-names>G. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шыныбекова Гаухар Орынбековна, магистр естественных наук, старший научный сотрудник</p><p>Гвардейский </p></bio><bio xml:lang="en"><p>Guardeyskiy </p></bio><email xlink:type="simple">sh.gaukhar@biosafety.kz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8777-8453</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шораева</surname><given-names>К. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shoraeva</surname><given-names>K. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шораева Камшат Абитхановна, PhD, заведующий лабораторией</p><p>Гвардейский </p></bio><bio xml:lang="en"><p>Guardeyskiy </p></bio><email xlink:type="simple">k.shorayeva@biosafety.kz</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ТОО «Научно-исследовательский институт проблем биологической безопасности», Национальный холдинг «QazBioPharm»</institution><country>Казахстан</country></aff><aff xml:lang="en"><institution>LLP «Research Institute for Biological Safety Problems», National holding «QazBioPharm»</institution><country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>24</day><month>09</month><year>2026</year></pub-date><volume>1</volume><issue>26</issue><fpage>52</fpage><lpage>60</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Адилова Г.С., Червякова О.В., Исабек А.У., Бопи А.К., Шыныбекова Г.О., Шораева К.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Адилова Г.С., Червякова О.В., Исабек А.У., Бопи А.К., Шыныбекова Г.О., Шораева К.А.</copyright-holder><copyright-holder xml:lang="en">Adilova G.S., Chervyakova O.V., Issabek A.U., Bopi A.K., Shynybekova G.O., Shoraeva K.A.</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://journal.biosafety.kz/jour/article/view/257">https://journal.biosafety.kz/jour/article/view/257</self-uri><abstract><p>Рекомбинантный белок Omp19 Brucella spp. рассматривается как перспективный антиген для разработки диагностических тест-систем и иммунобиологических препаратов, однако получение его растворимой формы остаётся актуальной задачей. Целью настоящего исследования являлась оптимизация условий диализа рекомбинантного белка Omp19 после очистки методом ионно-обменной хроматографии.Диализ проводили последовательно в нескольких буферных системах с различным составом солей и стабилизирующих компонентов. Эффективность диализа и растворимость белка оценивали методом ДСН-ПААГ (додецил сульфат натрия – полиакриламидный гель) с анализом надосадочных и осадочных фракций при различных температурных режимах хранения. Результаты показали, что при использовании буферов 1-4 рекомбинантный белок преимущественно переходил в нерастворимую форму и обнаруживался в осадке. Для повышения растворимости белка была проведена оптимизация концентрации L-аргинина в составе диализного буфера. Установлено, что применение буфера, содержащего 880 мМ L-аргинина, обеспечивало сохранение белка в растворимой фракции и предотвращало образование видимого осадка.Полученные результаты позволяют рекомендовать использование 880 мМ L-аргинина для стабилизации рекомбинантного белка Omp19 на этапах очистки и хранения, что имеет практическое значение для дальнейшего применения белка в диагностических и биотехнологических исследованиях.</p></abstract><trans-abstract xml:lang="en"><p>The recombinant Omp19 protein of Brucella spp. is considered as a promising antigen for the development of diagnostic test systems and immunobiological preparations. However, obtaining its soluble form remains a significant challenge. The aim of this study was to optimize the dialysis conditions for the recombinant Omp19 protein following purification by ion-exchange chromatography.Dialysis was performed sequentially in several buffer systems with varying compositions of salts and stabilizing components. Dialysis efficiency and protein solubility were assessed using the SDS-PAGE method, with analysis of the supernatant and pellet fractions under various storage temperature conditions. The results showed that when buffers 1-4 were used, the recombinant protein predominantly converted to an insoluble form and was detected in the pellet. To increase the protein’s solubility, the concentration of L-arginine in the dialysis buffer was optimized. It was found that using a buffer containing 880 mM Larginine ensured that the protein remained in the soluble fraction and prevented the formation of a visible pellet.Based on these results, we recommend using 880 mM L-arginine to stabilize the recombinant Omp19 protein during purification and storage, which is of practical importance for the further use of this protein in diagnostics and biotechnology research.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Brucella spp.</kwd><kwd>Omp19</kwd><kwd>рекомбинантный белок</kwd><kwd>диализ</kwd><kwd>ДСН-ПААГ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Brucella spp.</kwd><kwd>Omp19</kwd><kwd>recombinant protein</kwd><kwd>dialysis</kwd><kwd>SDS-PAGE</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This research has been funded by the Ministry of Health of the Republic of Kazakhstan under the program-targeted funding for scientific and scientific-technical programs for 2024–2026 (Project No. BR25293294, "Vaccine against brucellosis based on genomic technologies").</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">Pappas G., Papadimitriou P., Akritidis N., Christou L., Tsianos E. 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