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Coding Sequence Dependent mRNA Decay Regulation
Coding Sequence Dependent mRNA Decay Regulation
Coding Sequence Dependent mRNA Decay Regulation

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211151016
ISBN  
9798383565964
DDC  
575
저자명  
Musaev, Damir.
서명/저자  
Coding Sequence Dependent mRNA Decay Regulation
발행사항  
[Sl] : Yale University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
124 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
주기사항  
Advisor: Giraldez, Antonio J.
학위논문주기  
Thesis (Ph.D.)--Yale University, 2024.
초록/해제  
요약Post-transcriptional mRNA regulation shapes gene expression, yet the full extent of cis-regulatory sequences and how translation shapes the regulation of these elements is poorly understood. To identify conserved cis-regulatory elements shaping mRNA stability, I analyzed the features associated with differential mRNA decay in two vertebrate systems: steady-state HEK293 cells and developing zebrafish embryos. I found that strength of translation initiation (Kozak score), uORF content, codon optimality, AU-rich elements, microRNA binding sites, and ORF length function combinatorially to regulate mRNA stability. Surprisingly, machine learning analysis identified ORF length as the most important conserved feature regulating mRNA decay. I found that mRNAs with long ORFs have lower translation efficiency, thus potentially more ribosome depleted regions. To find factors involved in targeting long ORFs to decay, I used yeast knockout screen that revealed Upf1 as a factor to target "poorly translated/untranslated" mRNA regions of long ORFs. Using a massive parallel reporter assay (MPRA) I show that Upf1 binds poorly translated and untranslated ORFs which are associated with higher decay rate, including mRNAs with uORFs and those with exposed ORFs after stop codons. Additionally, Upf1 knockdown stabilizes mRNAs with long ORFs or containing uORFs. My study emphasizes Upf1's converging role in surveilling mRNAs with exposed ORFs that are poorly translated including mRNAs with long ORFs, ORF-like 3'UTRs and mRNAs containing uORFs. I propose that Upf1 regulation of poorly/untranslated ORFs provides a unifying mechanism of surveillance in regulating mRNA stability and homeostasis in an EJC-independent NMD pathway that I term ORF Mediated Decay (OMD).
일반주제명  
Genetics
일반주제명  
Molecular biology
일반주제명  
Bioinformatics
일반주제명  
Biology
일반주제명  
Biochemistry
키워드  
Homeostasis
키워드  
MicroRNA
키워드  
NMD pathway
키워드  
ORF length
키워드  
Gene expression
키워드  
ORF Mediated Decay
기타저자  
Yale University Genetics
기본자료저록  
Dissertations Abstracts International. 86-02B.
전자적 위치 및 접속  
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MARC

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■0820  ▼a575
■1001  ▼aMusaev,  Damir.
■24510▼aCoding  Sequence  Dependent  mRNA  Decay  Regulation
■260    ▼a[Sl]▼bYale  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a124  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-02,  Section:  B.
■500    ▼aAdvisor:  Giraldez,  Antonio  J.
■5021  ▼aThesis  (Ph.D.)--Yale  University,  2024.
■520    ▼aPost-transcriptional  mRNA  regulation  shapes  gene  expression,  yet  the  full  extent  of  cis-regulatory  sequences  and  how  translation  shapes  the  regulation  of  these  elements  is  poorly  understood.  To  identify  conserved  cis-regulatory  elements  shaping  mRNA  stability,  I  analyzed  the  features  associated  with  differential  mRNA  decay  in  two  vertebrate  systems:  steady-state  HEK293  cells  and  developing  zebrafish  embryos.  I  found  that  strength  of  translation  initiation  (Kozak  score),  uORF  content,  codon  optimality,  AU-rich  elements,  microRNA  binding  sites,  and  ORF  length  function  combinatorially  to  regulate  mRNA  stability.  Surprisingly,  machine  learning  analysis  identified  ORF  length  as  the  most  important  conserved  feature  regulating  mRNA  decay.  I  found  that  mRNAs  with  long  ORFs  have  lower  translation  efficiency,  thus  potentially  more  ribosome  depleted  regions.  To  find  factors  involved  in  targeting  long  ORFs  to  decay,  I  used  yeast  knockout  screen  that  revealed  Upf1  as  a  factor  to  target  "poorly  translated/untranslated"  mRNA  regions  of  long  ORFs.  Using  a  massive  parallel  reporter  assay  (MPRA)  I  show  that  Upf1  binds  poorly  translated  and  untranslated  ORFs  which  are  associated  with  higher  decay  rate,  including  mRNAs  with  uORFs  and  those  with  exposed  ORFs  after  stop  codons.  Additionally,  Upf1  knockdown  stabilizes  mRNAs  with  long  ORFs  or  containing  uORFs.  My  study  emphasizes  Upf1's  converging  role  in  surveilling  mRNAs  with  exposed  ORFs  that  are  poorly  translated  including  mRNAs  with  long  ORFs,  ORF-like  3'UTRs  and  mRNAs  containing  uORFs.  I  propose  that  Upf1  regulation  of  poorly/untranslated  ORFs  provides  a  unifying  mechanism  of  surveillance  in  regulating  mRNA  stability  and  homeostasis  in  an  EJC-independent  NMD  pathway  that  I  term  ORF  Mediated  Decay  (OMD).
■590    ▼aSchool  code:  0265.
■650  4▼aGenetics
■650  4▼aMolecular  biology
■650  4▼aBioinformatics
■650  4▼aBiology
■650  4▼aBiochemistry
■653    ▼aHomeostasis  
■653    ▼aMicroRNA
■653    ▼aNMD  pathway
■653    ▼aORF  length
■653    ▼aGene  expression
■653    ▼aORF  Mediated  Decay
■690    ▼a0369
■690    ▼a0307
■690    ▼a0715
■690    ▼a0487
■690    ▼a0306
■71020▼aYale  University▼bGenetics.
■7730  ▼tDissertations  Abstracts  International▼g86-02B.
■790    ▼a0265
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160422▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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