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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">54246</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Общая биофизика</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>General biophysics</subject>
    </subj-group>
    <subj-group>
     <subject>Общая биофизика</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">PROTEORHODOPSINS FROM EXIGUOBACTERIA - NEW MEMBERS OF THE RETINAL PROTEINS FAMILY</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>ПРОТЕОРОДОПСИНЫ EXIGUOBACTERIA - НОВЫЕ ПРЕДСТАВИТЕЛИ СЕМЕЙСТВА РЕТИНАЛЬНЫХ БЕЛКОВ</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Петровская</surname>
       <given-names>Л Е</given-names>
      </name>
      <name xml:lang="en">
       <surname>Petrovskaya</surname>
       <given-names>L E</given-names>
      </name>
     </name-alternatives>
     <email>lpetr65@yahoo.com</email>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Крюкова</surname>
       <given-names>Е А</given-names>
      </name>
      <name xml:lang="en">
       <surname>Kryukova</surname>
       <given-names>E A</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Лукашев</surname>
       <given-names>Е П</given-names>
      </name>
      <name xml:lang="en">
       <surname>Lukashev</surname>
       <given-names>E P</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Долгих</surname>
       <given-names>Д А</given-names>
      </name>
      <name xml:lang="en">
       <surname>Dolgikh</surname>
       <given-names>D A</given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-4"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Институт биоорганической химии им. академиков М.М. Шемякина и Ю.А. Овчинникова РАН</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Институт биоорганической химии им. академиков М.М. Шемякина и Ю.А. Овчинникова РАН</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">M. V. Lomonosov Moscow State University, Biological Department</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-4">
    <aff>
     <institution xml:lang="ru">Институт биоорганической химии им. академиков М.М. Шемякина и Ю.А. Овчинникова РАН; Московский государственный университет имени М.В. Ломоносова</institution>
     <country>ru</country>
    </aff>
    <aff>
     <institution xml:lang="en">Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences; M. V. Lomonosov Moscow State University, Biological Department</institution>
     <country>ru</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2018-03-25T20:22:29+03:00">
    <day>25</day>
    <month>03</month>
    <year>2018</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2018-03-25T20:22:29+03:00">
    <day>25</day>
    <month>03</month>
    <year>2018</year>
   </pub-date>
   <volume>3</volume>
   <issue>1</issue>
   <fpage>63</fpage>
   <lpage>67</lpage>
   <history>
    <date date-type="received" iso-8601-date="2018-03-20T20:22:29+03:00">
     <day>20</day>
     <month>03</month>
     <year>2018</year>
    </date>
    <date date-type="accepted" iso-8601-date="2018-03-20T20:22:29+03:00">
     <day>20</day>
     <month>03</month>
     <year>2018</year>
    </date>
   </history>
   <self-uri xlink:href="https://rusjbpc.ru/en/nauka/article/54246/view">https://rusjbpc.ru/en/nauka/article/54246/view</self-uri>
   <abstract xml:lang="ru">
    <p>Микробные родопсины - интегральные мембранные белки, которые выполняют светозависимый транспорт протонов и других ионов или сенсорные функции. Они обнаруживаются у архея, бактерий и эукариотических водорослей и включают в себя семь трансмембранных сегментов и хромофор ретиналь. Гены, кодирующие потенциальные ретинальные белки, были выявлены в геномах Грамположительных бактерий Exiguobacterium sibiricum , выделенной из вечномерзлого грунта возрастом 3 млн лет (ESR), термофильной Exiguobacterium AT1b из горячих источников Йеллоустонского Национального парка (ATER) и Exiguobacterium 7-3, также выделенной из многолетнемерзлого грунта (E7_3R). Ранее мы клонировали ген ESR и провели его структурно-функциональную характеристику. Аминокислотная последовательность E7_3R отличается от ESR в семи положениях, а АТЕR - в 39 положениях. Для сравнения свойств ретинальных белков, принадлежащих к близкородственным видам из разных мест обитания, мы экспрессировали ATER и E7_3R в клетках E. coli и исследовали их методом флеш-фотолиза при различных рН. Показано, что фотоцикл ATER и E7_3R отличается от ESR сдвигом рКа образования интермедиата M (депротонированного основания Шиффа) в щелочную область, а также пониженной скоростью его образования. Наблюдаемые различия обсуждаются во взаимосвязи с данными о трехмерной структуре ESR.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Microbial rhodopsins are the integral membrane proteins, which perform light-dependent transport of protons and other ions or sensor functions. They are found in archaea, bacteria and eukaryotic algae and share common heptahelical fold with a retinal chromophore. Potential rhodopsin-encoding genes were identified in the genomes of Gram-positive bacteria Exiguobacterium sibiricum, isolated from 3-million year old permafrost (ESR), the thermophilic Exiguobacterium AT1b from the Yellowstone National Park hot spring (ATER) and Exiguobacterium 7-3 , also isolated from permafrost soil (E7_3R). Previously, we have cloned the ESR gene and performed its structural and functional characterization. Amino acid sequence of E7_3R differs from ESR in seven positions, and ATER - in 39 positions. In order to compare the properties of retinal proteins belonging to closely related species from different environments, we have expressed ATER and E7_3R in E. coli cells and studied them by flash photolysis at different pH. We have shown that the photocycle of ATER and E7_3R differs from that of ESR by the shift of pKa of the M intermediate (the deprotonated Schiff base) formation to more alkaline pH and its reduced rate. The observed differences are discussed in relationship with the data about 3D structure of ESR.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>ретинальный белок</kwd>
    <kwd>протеородопсин</kwd>
    <kwd>Exiguobacterium</kwd>
    <kwd>основание Шиффа</kwd>
    <kwd>акцептор протонов</kwd>
    <kwd>донор протонов</kwd>
    <kwd>фотоцикл</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>retinal protein</kwd>
    <kwd>proteorhodopsin</kwd>
    <kwd>Exiguobacterium</kwd>
    <kwd>Schiff base</kwd>
    <kwd>proton acceptor</kwd>
    <kwd>proton donor</kwd>
    <kwd>photocycle</kwd>
   </kwd-group>
  </article-meta>
 </front>
 <body>
  <p></p>
 </body>
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