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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">54827</article-id>
   <article-id pub-id-type="doi">10.29039/rusjbpc.2022.0490</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Моделирование в биофизике</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>Modelling in biophycis</subject>
    </subj-group>
    <subj-group>
     <subject>Моделирование в биофизике</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">FEATURES OF THE POTENTIAL FIELD STRUCTURE OF THE PPF1 PLASMID AND THEIR INFLUENCE ON THE CHARACTER OF MOTION OF NONLINEAR CONFORMATIONAL PERTURBATIONS – KINKS</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Особенности структуры потенциального поля плазмиды pPF1 и их влияние на характер движения нелинейных конформационных возмущений – кинков</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Краснобаева</surname>
       <given-names>Л. А.</given-names>
      </name>
      <name xml:lang="en">
       <surname>Krasnobaeva</surname>
       <given-names>L. A.</given-names>
      </name>
     </name-alternatives>
     <email>kla1983@mail.ru</email>
     <xref ref-type="aff" rid="aff-1"/>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Якушевич</surname>
       <given-names>Л. В.</given-names>
      </name>
      <name xml:lang="en">
       <surname>Yakushevich</surname>
       <given-names>L. V.</given-names>
      </name>
     </name-alternatives>
     <email>kind-@mail.ru</email>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Сибирский государственный медицинский университет</institution>
     <city>Томск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Siberian State Medical University</institution>
     <city>Tomsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Национальный исследовательский Томский государственный университет</institution>
     <city>Томск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">National Research Tomsk State University</institution>
     <city>Tomsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">ФИЦ «Пущинский научный центр биологических исследований РАН»</institution>
     <city>Пущино</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">PSCBR RAS</institution>
     <city>Pushchino</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2022-03-25T20:22:29+03:00">
    <day>25</day>
    <month>03</month>
    <year>2022</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2022-03-25T20:22:29+03:00">
    <day>25</day>
    <month>03</month>
    <year>2022</year>
   </pub-date>
   <volume>7</volume>
   <issue>1</issue>
   <fpage>99</fpage>
   <lpage>104</lpage>
   <history>
    <date date-type="received" iso-8601-date="2022-03-20T20:22:29+03:00">
     <day>20</day>
     <month>03</month>
     <year>2022</year>
    </date>
    <date date-type="accepted" iso-8601-date="2022-03-20T20:22:29+03:00">
     <day>20</day>
     <month>03</month>
     <year>2022</year>
    </date>
   </history>
   <self-uri xlink:href="https://rusjbpc.ru/en/nauka/article/54827/view">https://rusjbpc.ru/en/nauka/article/54827/view</self-uri>
   <abstract xml:lang="ru">
    <p>В настоящей работе методы математического моделирования применяются для изучения особенностей динамики нелинейных конформационных возмущений – кинков в плазмиде pPF1. Движение кинков рассматривается как движение квазичастиц в потенциальном поле плазмиды. Поведение таких квазичастиц во многом определяются видом и характером этого поля. Для моделирования движения кинка вдоль плазмиды pPF1 использовалось уравнением МакЛафлина-Скотта. С помощью квазиоднородного приближения и блочного метода были рассчитаны энергетический профиль потенциального поля плазмиды pPF1 и построены 2D траектории движения кинков в области, расположенной между генами флуоресцентных белков Egfp и mCherry, при этом учитывались эффекты диссипации и воздействия постоянного торсионного поля. Показано, что существуют пороговые значения торсионного поля, ниже и выше которых поведение кинка существенно меняется: происходит переход от циклического движения кинка внутри области, расположенной между генами флуоресцентных белков Egfp и mCherry, к поступательному движению и выходу из этой области. Сделаны оценки пороговых значений. Показано, что они зависят от характера энергетического профиля вблизи области, расположенной между генами флуоресцентных белков Egfp и mCherry.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>In this work, mathematical modeling methods are used to study the features of the dynamics of the nonlinear conformational perturbations, kinks, in the pPF1 plasmid. The motion of kinks is considered as the motion of quasiparticles in the potential field of the plasmid. The behavior of such quasiparticles is largely determined by the type and nature of this field. To simulate the movement of the kink along the pPF1 plasmid, the McLaughlin-Scott equation was used. Using the quasi-homogeneous approximation and the block method, the energy profile of the potential field of the pPF1 plasmid was calculated and 2D kink trajectories were constructed in the region located between the genes of the Egfp and mCherry fluorescent proteins, taking into account the effects of dissipation and exposure to a constant torsion field. It was shown that there are threshold values of the torsion field, below and above which the behavior of the kink changes significantly: there is a transition from the cyclic motion of the kink inside the region located between the genes of the fluorescent proteins Egfp and mCherry to the translational motion and exit from this region. Threshold values have been estimated. It was shown that they depend on the nature of the energy profile near the region located between the genes of the fluorescent proteins Egfp and mCherry.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>кинки ДНК</kwd>
    <kwd>плазмида pPF1</kwd>
    <kwd>энергетический профиль</kwd>
    <kwd>2D траектория</kwd>
    <kwd>торсионный момент</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>DNA kinks</kwd>
    <kwd>plasmid pPF1</kwd>
    <kwd>energy profile</kwd>
    <kwd>2D trajectory</kwd>
    <kwd>torsion moment</kwd>
   </kwd-group>
  </article-meta>
 </front>
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