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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 custom-type="elpub" pub-id-type="custom">vestib-326</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>ОСОБЕННОСТИ АМИНОКИСЛОТНОГО СОСТАВА АЛЬФА-СПИРАЛЬНЫХ УЧАСТКОВ В ПОЛИПЕПТИДНЫХ ЦЕПЯХ БЕЛКОВ РАЗЛИЧНЫХ СТРУКТУРНЫХ КЛАССОВ</article-title><trans-title-group xml:lang="en"><trans-title>THE CHARACTERISTIC PROPERTIES OF AMINO ACID CONTENT OF ALPHA HELICES FRAGMENTS IN POLYPEPTIDE CHAINS OF DIFFERENT STRUCTURAL CLASSES OF PROTEINS</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>Побойнев</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Poboinev</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>магистрант</p><p>пр. Дзержинского, 83, 220116</p></bio><bio xml:lang="en"><p>Undergraduate</p><p>83, Dzerzhynskiy Ave., 220116</p></bio><email xlink:type="simple">dremozzew@mail.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>Хрусталев</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Khrustalev</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доцент, заведующий кафедрой</p><p>пр. Дзержинского, 83, 220116</p></bio><bio xml:lang="en"><p>Assistant Professor, Head of the Department</p><p>83, Dzerzhynskiy Ave., 220116</p></bio><email xlink:type="simple">vvkhrustalev@mail.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>Хрусталева</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khrustaleva</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ст. науч. сотрудник</p><p>ул. Академическая, 28, 220072</p></bio><bio xml:lang="en"><p>Senior researcher</p><p>28, Aсademicheskaya Str., 220072</p></bio><email xlink:type="simple">tanissia.lir@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный медицинский университет, Минск</institution></aff><aff xml:lang="en"><institution>Belarusian State Medical University, Minsk</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт физиологии НАН Беларуси, Минск</institution></aff><aff xml:lang="en"><institution>Institute of Physiology of the National Academy of Sciences of Belarus, Minsk</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>16</day><month>12</month><year>2017</year></pub-date><volume>0</volume><issue>4</issue><fpage>58</fpage><lpage>66</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Побойнев В.В., Хрусталев В.В., Хрусталева Т.А., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Побойнев В.В., Хрусталев В.В., Хрусталева Т.А.</copyright-holder><copyright-holder xml:lang="en">Poboinev V.V., Khrustalev V.V., Khrustaleva T.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://vestibio.belnauka.by/jour/article/view/326">https://vestibio.belnauka.by/jour/article/view/326</self-uri><abstract><p>В статье проанализированы особенности распределения аминокислотных остатков по альфа-спиральным фрагментам 3D-структур негомологичных белков четырех структурных классов. По результатам сравнения вероятностных шкал выяснено, что высокая вероятность включения в альфа-спирали лизина, аргинина и гистидина отмечается не во всех классах белков, в отличие от постоянно формирующих альфа-спирали аланина, лейцина, глутаминовой кислоты, глутамина и метионина. Для альфа-спиралей бета-структурных белков характерно обеднение лейцином на фоне повышения частоты использования глутамина, а также комбинаций гидрофильных и гидрофобных аминокислотных остатков, стабилизирующих альфа-спираль, по сравнению с альфа-спиралями из белков альфа-спирального класса. Особенности аминокислотного состава альфа-спиральных участков, расположенных между двумя бета-тяжами в белках бета-структурного класса и в смешанных белках, указывают на то, что они в наибольшей степени защищены от перехода в бета-структурное состояние. Полученные сведения важны при отборе антигенных фрагментов белков, имеющих в своем составе альфа-спиральные участки, отличающиеся наибольшей стабильностью вторичной структуры, для дальнейшего дизайна вакцинных пептидов. </p></abstract><trans-abstract xml:lang="en"><p>In this study we analyzed the amino acid content of alpha helices from proteins that belong to four structural classes in nonhomologous sets of 3D structures. Comparison of probability scales revealed that lysine, arginine and histidine show high probabilities to be included in alpha helices only in certain structural classes of proteins, unlike the constant formers of alpha helices: alanine, leucine, glutamic acid, glutamine and methionine. Alpha helices of beta structural proteins show lower usage of leucine and higher usage of glutamine, as well as the elevated usage of combinations of hydrophilic and hydrophobic amino acids that are characteristic to beta strands, relative to alpha helices from alpha helical proteins. The properties of amino acid content of alpha helices situated between two beta strands in beta structural and mixed proteins show that they are protected from the shift to beta strands. Obtained data are important in the process of the selection of antigenic fragments of proteins that contain alpha helices with highly stabilized secondary structure, with the aim to use them in vaccine design studies. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>альфа-спираль</kwd><kwd>структурный класс белка</kwd><kwd>гидрофобный аминокислотный остаток</kwd><kwd>гидрофильный аминокислотный остаток</kwd><kwd>бета-тяж</kwd></kwd-group><kwd-group xml:lang="en"><kwd>alpha helix</kwd><kwd>structural class of a protein</kwd><kwd>hydrophobic amino acid residue</kwd><kwd>hydrophilic amino acid residue</kwd><kwd>beta strand</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке в рамках гранта Белорусского республиканского фонда фундаментальных исследований № Б16М-083.</funding-statement><funding-statement xml:lang="en">This work was financially supported by the grant of the Belarusian Republican Foundation for Fundamental Research no. 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