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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Russian Journal of Biological Physics and Chemisrty</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Russian Journal of Biological Physics and Chemisrty</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>АКТУАЛЬНЫЕ ВОПРОСЫ БИОЛОГИЧЕСКОЙ ФИЗИКИ И ХИМИИ</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">2499-9962</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">54191</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>МОЛЕКУЛЯРНАЯ БИОФИЗИКА И ФИЗИКА БИОМОЛЕКУЛ</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>MOLECULAR BIOPHYSICS AND PHYSICS OF BIOMOLECULES</subject>
    </subj-group>
    <subj-group>
     <subject>МОЛЕКУЛЯРНАЯ БИОФИЗИКА И ФИЗИКА БИОМОЛЕКУЛ</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Changes of the chirality index during conformational transformations of mini-proteins TRP-cage</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Изменение индекса хиральности при конформационных изменениях мини-белков TRP-cage</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Хамицаев</surname>
       <given-names>А К</given-names>
      </name>
      <name xml:lang="en">
       <surname>Khamizayev</surname>
       <given-names>A K</given-names>
      </name>
     </name-alternatives>
     <email>a.khamitsaev@yandex.ru</email>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Яковенко</surname>
       <given-names>Л В</given-names>
      </name>
      <name xml:lang="en">
       <surname>Yakovenko</surname>
       <given-names>L V</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Московский государственный университет им. М.В. Ломоносова</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">M.V. Lomonosov Moscow State University</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Московский государственный университет им. М.В. Ломоносова</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">M.V. Lomonosov Moscow State University</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2017-06-25T20:22:29+03:00">
    <day>25</day>
    <month>06</month>
    <year>2017</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2017-06-25T20:22:29+03:00">
    <day>25</day>
    <month>06</month>
    <year>2017</year>
   </pub-date>
   <volume>2</volume>
   <issue>1</issue>
   <fpage>356</fpage>
   <lpage>360</lpage>
   <history>
    <date date-type="received" iso-8601-date="2017-06-20T20:22:29+03:00">
     <day>20</day>
     <month>06</month>
     <year>2017</year>
    </date>
    <date date-type="accepted" iso-8601-date="2017-06-20T20:22:29+03:00">
     <day>20</day>
     <month>06</month>
     <year>2017</year>
    </date>
   </history>
   <self-uri xlink:href="https://rusjbpc.ru/en/nauka/article/54191/view">https://rusjbpc.ru/en/nauka/article/54191/view</self-uri>
   <abstract xml:lang="ru">
    <p>Недавно открытая закономерность чередования знака хиральности в иерархиях уровней структурной организации белков и нуклеиновых кислот основана на глубокой взаимосвязи между свойствами симметрии макромолекул и их физико-химическими свойствами. Хиральность молекулярных структур обычно описывается в терминах бинарной логики: структуры либо хиральны, либо ахиральны. Для выявления физических механизмов, определяющих роль гомохиральности первичных структур белков и нуклеиновых кислот в процессах фолдинга и конформационных перестроек, необходимо использовать подходящую непрерывную меру хиральности и определить взаимосвязь между ее изменениями и изменениями физических характеристик макромолекул в этих процессах. В настоящей работе в качестве непрерывной меры хиральности использован индекс хиральности, предложенный А.В. Лузановым, рассчитаны его изменения при фолдинге ряда мини-белков типа Trp-cage и полученные данные сопоставлены с соответствующими изменениями энтропии. Особенностью индекса хиральности является смена знака при изменении знака хиральности. В связи с этим степень симметрии молекулы связана с модулем индекса хиральности: чем меньше его модуль, тем симметричнее молекула. Рассчитанные значения энтропии мини-белков коррелируют с модулями их индексов хиральности.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Recently discovered regularity in alternation of the chirality sense in the hierarchies of structural organisation levels of proteins and nucleic acids is based on a deep interconnection of macromolecule symmetry with its physical-chemical properties. Chirality of molecular structures is usually described in terms of binary logic, i.e. the structures are either chiral, or achiral. To reveal physical mechanisms determining the role of homochirality of primary structures of proteins and nucleic acids in processes of folding and conformational rearrangements it is necessary to use a suitable continuous measure of chirality and find the relationship between its changes and changes of the physical characteristics of macromolecules in such processes. In this work the chirality index suggested by A.V. Luzanov is used as a continuous measure of chirality, its changes during foldings of a number of mini-proteins of the Trp-cage class are calculated and compared with the corresponding changes in entropy. The distinctive quality of the chirality index consists in its changing sign with the change of the chirality sense. Due to this property the degree of molecular symmetry is related to the modulus of the chirality index: the lower the modulus, the more symmetric is the molecule. The calculated values of entropies of mini-proteins correlate with their chirality index moduli.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>иральность</kwd>
    <kwd>индекс хиральности</kwd>
    <kwd>энтропия</kwd>
    <kwd>конформационные изменения</kwd>
    <kwd>мини-белки</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>chirality</kwd>
    <kwd>chirality index</kwd>
    <kwd>entropy</kwd>
    <kwd>conformational transformations</kwd>
    <kwd>mini-proteins</kwd>
   </kwd-group>
  </article-meta>
 </front>
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