본문

서브메뉴

Histone Regulation of the Maternal to Zygotic Transition: The Role of Histone Modifications on Zygotic Genome Activation
Histone Regulation of the Maternal to Zygotic Transition: The Role of Histone Modification...
Histone Regulation of the Maternal to Zygotic Transition: The Role of Histone Modifications on Zygotic Genome Activation

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211151033
ISBN  
9798383351598
DDC  
575
저자명  
Benitez, Maria De Jesus.
서명/저자  
Histone Regulation of the Maternal to Zygotic Transition: The Role of Histone Modifications on Zygotic Genome Activation
발행사항  
[Sl] : Yale University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
88 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
주기사항  
Advisor: Giraldez, Antonio J.
학위논문주기  
Thesis (Ph.D.)--Yale University, 2024.
초록/해제  
요약Following fertilization, the zebrafish embryo experiences significant reprogramming events to erase the inherited program of the terminally differentiated gametes, paving the way for the establishment of the zygotic program, which will drive the early steps of embryonic development. An essential step within this process is zygotic genome activation (ZGA), which refers to the time of development when the zygotic genome goes from being largely transcriptionally inactive to a gradual onset of transcriptional activity. In zebrafish, this process coincides with the deposition of many histone modifications associated with the positive regulation of transcription. Here, to explore the function of these transcription-associated marks during ZGA, I use a series of small-molecule inhibitors to screen against histone-modifying enzymes that cause gastrulation defects, as this tends to indicate defects in zygotic genome activation. I find that inhibitors against the acetyltransferases KAT2A and KAT8 tend to block gastrulation. Meanwhile, those against the H3K4 histone methyltransferase, KMT2, allow for the development of the embryo past gastrulation and do not prevent transcriptional appear to prevent transcriptional onset. While transcription is not globally downregulated, some transcripts are preferentially affected by the removal of the mark. Interestingly, inhibiting the eraser of H3K4me3, KDM5 blocks development at gastrulation. Given that this and other studies suggest that the activity of several epigenetic modifiers is essential for the correct regulation of Zygotic genome activation, I use the overexpression of lysine(K) to arginine(R) mutant histones in a histone-deficient background to interrogate the role of the histone modifications independent of any other enzymatic activity of the epigenetic modifier. In particular, to study the role of H3K27 in the onset of ZGA. Preventing the modification of the H3 tail blocks gastrulation and downregulated transcription in embryos injected with the mutant version of the histone. Interestingly, in mutants where only one lysine is replaced at a time, only K27R mutants mimic the developmental phenotype and the downregulation of transcription. All of these suggest a role for H3 lysine tail modifications in regulating ZGA and a critical role for K27.
일반주제명  
Genetics
일반주제명  
Cellular biology
일반주제명  
Biology
일반주제명  
Molecular biology
키워드  
Zygotic genome activation
키워드  
Histone modifications
키워드  
Embryonic development
키워드  
Gastrulation
기타저자  
Yale University Genetics
기본자료저록  
Dissertations Abstracts International. 86-01B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008250123s2024        us                              c    eng  d
■001000017160516
■00520250211151033
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798383351598
■035    ▼a(MiAaPQ)AAI30997417
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a575
■1001  ▼aBenitez,  Maria  De  Jesus.
■24510▼aHistone  Regulation  of  the  Maternal  to  Zygotic  Transition:  The  Role  of  Histone  Modifications  on  Zygotic  Genome  Activation
■260    ▼a[Sl]▼bYale  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a88  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-01,  Section:  B.
■500    ▼aAdvisor:  Giraldez,  Antonio  J.
■5021  ▼aThesis  (Ph.D.)--Yale  University,  2024.
■520    ▼aFollowing  fertilization,  the  zebrafish  embryo  experiences  significant  reprogramming  events  to  erase  the  inherited  program  of  the  terminally  differentiated  gametes,  paving  the  way  for  the  establishment  of  the  zygotic  program,  which  will  drive  the  early  steps  of  embryonic  development.  An  essential  step  within  this  process  is  zygotic  genome  activation  (ZGA),  which  refers  to  the  time  of  development  when  the  zygotic  genome  goes  from  being  largely  transcriptionally  inactive  to  a  gradual  onset  of  transcriptional  activity.  In  zebrafish,  this  process  coincides  with  the  deposition  of  many  histone  modifications  associated  with  the  positive  regulation  of  transcription.  Here,  to  explore  the  function  of  these  transcription-associated  marks  during  ZGA,  I  use  a  series  of  small-molecule  inhibitors  to  screen  against  histone-modifying  enzymes  that  cause  gastrulation  defects,  as  this  tends  to  indicate  defects  in  zygotic  genome  activation.  I  find  that  inhibitors  against  the  acetyltransferases  KAT2A  and  KAT8  tend  to  block  gastrulation.  Meanwhile,  those  against  the  H3K4  histone  methyltransferase,  KMT2,  allow  for  the  development  of  the  embryo  past  gastrulation  and  do  not  prevent  transcriptional  appear  to  prevent  transcriptional  onset.  While  transcription  is  not  globally  downregulated,  some  transcripts  are  preferentially  affected  by  the  removal  of  the  mark.  Interestingly,  inhibiting  the  eraser  of  H3K4me3,  KDM5  blocks  development  at  gastrulation.  Given  that  this  and  other  studies  suggest  that  the  activity  of  several  epigenetic  modifiers  is  essential  for  the  correct  regulation  of  Zygotic  genome  activation,  I  use  the  overexpression  of  lysine(K)  to  arginine(R)  mutant  histones  in  a  histone-deficient  background  to  interrogate  the  role  of  the  histone  modifications  independent  of  any  other  enzymatic  activity  of  the  epigenetic  modifier.  In  particular,  to  study  the  role  of  H3K27  in  the  onset  of  ZGA.  Preventing  the  modification  of  the  H3  tail  blocks  gastrulation  and  downregulated  transcription  in  embryos  injected  with  the  mutant  version  of  the  histone.  Interestingly,  in  mutants  where  only  one  lysine  is  replaced  at  a  time,  only  K27R  mutants  mimic  the  developmental  phenotype  and  the  downregulation  of  transcription.  All  of  these  suggest  a  role  for  H3  lysine  tail  modifications  in  regulating  ZGA  and  a  critical  role  for  K27.
■590    ▼aSchool  code:  0265.
■650  4▼aGenetics
■650  4▼aCellular  biology
■650  4▼aBiology
■650  4▼aMolecular  biology
■653    ▼aZygotic  genome  activation
■653    ▼aHistone  modifications
■653    ▼aEmbryonic  development
■653    ▼aGastrulation
■690    ▼a0369
■690    ▼a0379
■690    ▼a0306
■690    ▼a0307
■71020▼aYale  University▼bGenetics.
■7730  ▼tDissertations  Abstracts  International▼g86-01B.
■790    ▼a0265
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160516▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

미리보기

내보내기

chatGPT토론

Ai 추천 관련 도서


    신착도서 더보기
    최근 3년간 통계입니다.

    소장정보

    • 예약
    • 소재불명신고
    • 나의폴더
    • 우선정리요청
    • 비도서대출신청
    • 야간 도서대출신청
    소장자료
    등록번호 청구기호 소장처 대출가능여부 대출정보
    TF10021 전자도서 대출가능 마이폴더 부재도서신고 비도서대출신청 야간 도서대출신청

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

    해당 도서를 다른 이용자가 함께 대출한 도서

    관련 인기도서

    로그인 후 이용 가능합니다.