본문

서브메뉴

상세정보

Pch2 is a hexameric ring ATPase that remodels the meiotic chromosome axis protein Hop1- [electronic resource]
Pch2 is a hexameric ring ATPase that remodels the meiotic chromosome axis protein Hop1 - [...
Pch2 is a hexameric ring ATPase that remodels the meiotic chromosome axis protein Hop1- [electronic resource]

상세정보

자료유형  
 학위논문(국외)
자관 청구기호  
기본표목-개인명  
표제와 책임표시사항  
Pch2 is a hexameric ring ATPase that remodels the meiotic chromosome axis protein Hop1 - [electronic resource] / Chen, Cheng.
발행, 배포, 간사 사항  
[Sl] : Cornell University , 2014
    발행, 배포, 간사 사항  
    Ann Arbor : ProQuest Dissertations & Theses , 2014
      형태사항  
      1 online resource(202 p)
      일반주기  
      Source: Dissertation Abstracts International, Volume: 75-10(E), Section: B.
      일반주기  
      Adviser: Eric Alani.
      학위논문주기  
      Thesis (Ph.D.)--Cornell University, 2014.
      이용제한주기  
      This item is not available from ProQuest Dissertations & Theses.
      요약 등 주기  
      요약In most organisms, the accurate segregation of chromosomes during the first meiotic division requires at least one crossover between each pair of homologous chromosomes. Crossovers form in meiosis from programmed double-strand breaks (DSBs) that are preferentially repaired using the homologous chromosome as a template. The PCH2 gene of budding yeast is required to establish proper meiotic chromosome structure, and to regulate meiotic DSB repair outcomes. PCH2 was also found to promote meiotic checkpoint functions, and to maintain ribosomal DNA stability during meiosis. The major focus of my thesis research has been to elucidate the molecular mechanism of Pch2 function. Pch2 contains an AAA (A&barbelow;TPases A&barbelow;ssociated with diverse cellular A&barbelow;ctivities) domain and is conserved in worms, fruit flies, and mammals. I performed the first detailed biochemical analysis of Pch2, and found that purified Pch2 oligomerizes into single hexameric rings in the presence of nucleotide. In addition, I showed that Pch2 directly binds to Hop1, a critical component of the synaptonemal complex that facilitates DSB repair to form crossovers. Interestingly, Hop1 binding by Pch2 induces large conformational changes in Pch2 hexamers, suggesting that Pch2 hexamers exert mechanical forces on Hop1. Importantly, I demonstrate that Pch2 subunits coordinate their ATP hydrolysis activities to displace Hop1 from large DNA substrates, providing an explanation for the altered localization of Hop1 in pch2Delta mutants that was previously observed. Based on these results and other genetic and cell biological evidences I propose that Pch2 impacts multiple meiotic chromosome functions by directly regulating Hop1 localization.
      요약 등 주기  
      요약The second part of my thesis involves analyzing the pro-crossover Msh4-Msh5 complex, which facilitates interhomolog crossover formation by stabilizing recombination intermediates. To analyze Msh4-Msh5 function, I assayed spore viability and crossover levels for 57 msh4 and msh5 mutants and identified threshold mutants that showed wild-type spore viability but significantly decreased crossover levels. These findings suggest that a buffering mechanism exists to ensure the obligate crossover when overall crossover levels are reduced.
      주제명부출표목-일반주제명  
      주제명부출표목-일반주제명  
      주제명부출표목-일반주제명  
      부출표목-단체명  
      Cornell University Molecular Biology and Genetics
        기본자료저록  
        Dissertation Abstracts International. 75-10B(E).
        기본자료저록  
        Dissertation Abstract International
        전자적 위치 및 접속  
         원문정보보기
        소장사항  
        20180515 2018

        MARC

         008180601s2014        us          esm        001c    eng
        ■001MOKWON01257748
        ■00520180518094448
        ■007cr
        ■020    ▼a9781321125993
        ■035    ▼a(MiAaPQ)AAI3583137
        ■040    ▼aMiAaPQ▼cMiAaPQ
        ■090    ▼a전자도서(박사논문)
        ■1001  ▼aChen,  Cheng.
        ■24510▼aPch2  is  a  hexameric  ring  ATPase  that  remodels  the  meiotic  chromosome  axis  protein  Hop1▼h[electronic  resource]▼cChen,  Cheng.
        ■260    ▼a[Sl]▼bCornell  University▼c2014
        ■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2014
        ■300    ▼a1  online  resource(202  p)
        ■500    ▼aSource:  Dissertation  Abstracts  International,  Volume:  75-10(E),  Section:  B.
        ■500    ▼aAdviser:  Eric  Alani.
        ■5021  ▼aThesis  (Ph.D.)--Cornell  University,  2014.
        ■506    ▼aThis  item  is  not  available  from  ProQuest  Dissertations  &  Theses.
        ■520    ▼aIn  most  organisms,  the  accurate  segregation  of  chromosomes  during  the  first  meiotic  division  requires  at  least  one  crossover  between  each  pair  of  homologous  chromosomes.  Crossovers  form  in  meiosis  from  programmed  double-strand  breaks  (DSBs)  that  are  preferentially  repaired  using  the  homologous  chromosome  as  a  template.  The  PCH2  gene  of  budding  yeast  is  required  to  establish  proper  meiotic  chromosome  structure,  and  to  regulate  meiotic  DSB  repair  outcomes.  PCH2  was  also  found  to  promote  meiotic  checkpoint  functions,  and  to  maintain  ribosomal  DNA  stability  during  meiosis.  The  major  focus  of  my  thesis  research  has  been  to  elucidate  the  molecular  mechanism  of  Pch2  function.  Pch2  contains  an  AAA  (A&barbelow;TPases  A&barbelow;ssociated  with  diverse  cellular  A&barbelow;ctivities)  domain  and  is  conserved  in  worms,  fruit  flies,  and  mammals.  I  performed  the  first  detailed  biochemical  analysis  of  Pch2,  and  found  that  purified  Pch2  oligomerizes  into  single  hexameric  rings  in  the  presence  of  nucleotide.  In  addition,  I  showed  that  Pch2  directly  binds  to  Hop1,  a  critical  component  of  the  synaptonemal  complex  that  facilitates  DSB  repair  to  form  crossovers.  Interestingly,  Hop1  binding  by  Pch2  induces  large  conformational  changes  in  Pch2  hexamers,  suggesting  that  Pch2  hexamers  exert  mechanical  forces  on  Hop1.  Importantly,  I  demonstrate  that  Pch2  subunits  coordinate  their  ATP  hydrolysis  activities  to  displace  Hop1  from  large  DNA  substrates,  providing  an  explanation  for  the  altered  localization  of  Hop1  in  pch2Delta  mutants  that  was  previously  observed.  Based  on  these  results  and  other  genetic  and  cell  biological  evidences  I  propose  that  Pch2  impacts  multiple  meiotic  chromosome  functions  by  directly  regulating  Hop1  localization.
        ■520    ▼aThe  second  part  of  my  thesis  involves  analyzing  the  pro-crossover  Msh4-Msh5  complex,  which  facilitates  interhomolog  crossover  formation  by  stabilizing  recombination  intermediates.  To  analyze  Msh4-Msh5  function,  I  assayed  spore  viability  and  crossover  levels  for  57  msh4  and  msh5    mutants  and  identified  threshold  mutants  that  showed  wild-type  spore  viability  but  significantly  decreased  crossover  levels.  These  findings  suggest  that  a  buffering  mechanism  exists  to  ensure  the  obligate  crossover  when  overall  crossover  levels  are  reduced.
        ■590    ▼aSchool  code:  0058.
        ■650  4▼aBiochemistry
        ■650  4▼aMolecular  biology
        ■650  4▼aGenetics
        ■690    ▼a0487
        ■690    ▼a0307
        ■690    ▼a0369
        ■71020▼aCornell  University▼bMolecular  Biology  and  Genetics.
        ■7730  ▼tDissertation  Abstracts  International▼g75-10B(E).
        ■773    ▼tDissertation  Abstract  International
        ■790    ▼a0058
        ■791    ▼aPh.D.
        ■792    ▼a2014
        ■793    ▼aEnglish
        ■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T14824050▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
        ■980    ▼a20180515▼f2018

        미리보기

        내보내기

        chatGPT토론

        Ai 추천 관련 도서


          신착도서 더보기
          관련도서 더보기
          최근 3년간 통계입니다.
          SMS 발송 간략정보 이동 상세정보출력

          소장정보

          • 예약
          • 서가에 없는 책 신고
          • 자료배달서비스
          • 나의폴더
          • 우선정리요청
          소장자료
          등록번호 청구기호 소장처 대출가능여부 대출정보
          EM093502 TD  전자도서(박사논문) 연속간행물실(2층) 온라인이용가능 온라인이용가능
          마이폴더

          * 대출중인 자료에 한하여 예약이 가능합니다. 예약을 원하시면 예약버튼을 클릭하십시오.

          해당 도서를 다른 이용자가 함께 대출한 도서

          관련도서

          관련 인기도서

          서평쓰기

          도서위치

          AiBot !!
          CH