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Mechanistic Studies of Membrane Protein Biogenesis at the ER and Mitochondria
Mechanistic Studies of Membrane Protein Biogenesis at the ER and Mitochondria
Mechanistic Studies of Membrane Protein Biogenesis at the ER and Mitochondria

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202103134
ISBN  
9798311932523
DDC  
574
저자명  
Hazu, Masami.
서명/저자  
Mechanistic Studies of Membrane Protein Biogenesis at the ER and Mitochondria
발행사항  
[Sl] : California Institute of Technology, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
177 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Advisor: Voorhees, Rebecca.
학위논문주기  
Thesis (Ph.D.)--California Institute of Technology, 2025.
초록/해제  
요약Eukaryotic cells are organized into membrane-enclosed compartments with elaborate networks of integral membrane proteins. From synthesis, localization, and insertion into designated cellular membranes, to proper folding and assembly of the membrane proteins, the successful biogenesis of membrane proteins is crucial for defining the organellar compartments and for overall proteostasis. Recent advances in the field of membrane protein biogenesis in both the endoplasmic reticulum (ER) and the mitochondria have identified novel machineries involved in the membrane insertion step. These are the ER membrane protein complex (EMC) at the ER and the mitochondrial carrier homolog 2 (MTCH2) at the outer mitochondrial membrane (OMM). In this thesis, we employ a combination of biochemical, cell biological, structural, and genetic techniques to explore in mechanistic detail the insertase function of the EMC and MTCH2 at the molecular level. In the first part of the thesis, our work on the EMC maps out the pathway of a tail-anchored (TA) protein through the insertase and revealed a selectivity filter that provides the biochemical basis for how the EMC protects compartment integrity. The selectivity filter of the EMC limits TA protein mislocalization and prevents topological errors of multi-pass membrane proteins. In the second part, ongoing work on MTCH2 reveals the absence of a prominent selectivity mechanism and provides insight into a regulatory mechanism of MTCH2, which seems to be conserved across metazoan MTCH2 homologs.
일반주제명  
Membranes
일반주제명  
Signal transduction
일반주제명  
Homeostasis
일반주제명  
Endoplasmic reticulum
일반주제명  
Protein folding
일반주제명  
Ribonucleic acid--RNA
일반주제명  
Biosynthesis
일반주제명  
Mitochondria
일반주제명  
Genomes
일반주제명  
Lipids
일반주제명  
Phosphorylation
일반주제명  
Yeast
일반주제명  
Apoptosis
일반주제명  
Cellular biology
일반주제명  
Biochemistry
기타저자  
California Institute of Technology Biology and Biological Engineering
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
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MARC

 008260126s2025        us                              c    eng  d
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■00520260202103134
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798311932523
■035    ▼a(MiAaPQ)AAI31954655
■035    ▼a(MiAaPQ)Caltech16987
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574
■1001  ▼aHazu,  Masami.
■24510▼aMechanistic  Studies  of  Membrane  Protein  Biogenesis  at  the  ER  and  Mitochondria
■260    ▼a[Sl]▼bCalifornia  Institute  of  Technology▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a177  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aAdvisor:  Voorhees,  Rebecca.
■5021  ▼aThesis  (Ph.D.)--California  Institute  of  Technology,  2025.
■520    ▼aEukaryotic  cells  are  organized  into  membrane-enclosed  compartments  with  elaborate  networks  of  integral  membrane  proteins.  From  synthesis,  localization,  and  insertion  into  designated  cellular  membranes,  to  proper  folding  and  assembly  of  the  membrane  proteins,  the  successful  biogenesis  of  membrane  proteins  is  crucial  for  defining  the  organellar  compartments  and  for  overall  proteostasis.  Recent  advances  in  the  field  of  membrane  protein  biogenesis  in  both  the  endoplasmic  reticulum  (ER)  and  the  mitochondria  have  identified  novel  machineries  involved  in  the  membrane  insertion  step.  These  are  the  ER  membrane  protein  complex  (EMC)  at  the  ER  and  the  mitochondrial  carrier  homolog  2  (MTCH2)  at  the  outer  mitochondrial  membrane  (OMM).  In  this  thesis,  we  employ  a  combination  of  biochemical,  cell  biological,  structural,  and  genetic  techniques  to  explore  in  mechanistic  detail  the  insertase  function  of  the  EMC  and  MTCH2  at  the  molecular  level.  In  the  first  part  of  the  thesis,  our  work  on  the  EMC  maps  out  the  pathway  of  a  tail-anchored  (TA)  protein  through  the  insertase  and  revealed  a  selectivity  filter  that  provides  the  biochemical  basis  for  how  the  EMC  protects  compartment  integrity.  The  selectivity  filter  of  the  EMC  limits  TA  protein  mislocalization  and  prevents  topological  errors  of  multi-pass  membrane  proteins.  In  the  second  part,  ongoing  work  on  MTCH2  reveals  the  absence  of  a  prominent  selectivity  mechanism  and  provides  insight  into  a  regulatory  mechanism  of  MTCH2,  which  seems  to  be  conserved  across  metazoan  MTCH2  homologs.
■590    ▼aSchool  code:  0037.
■650  4▼aMembranes
■650  4▼aSignal  transduction
■650  4▼aHomeostasis
■650  4▼aEndoplasmic  reticulum
■650  4▼aProtein  folding
■650  4▼aRibonucleic  acid--RNA
■650  4▼aBiosynthesis
■650  4▼aMitochondria
■650  4▼aGenomes
■650  4▼aLipids
■650  4▼aPhosphorylation
■650  4▼aYeast
■650  4▼aApoptosis
■650  4▼aCellular  biology
■650  4▼aBiochemistry
■690    ▼a0379
■690    ▼a0487
■71020▼aCalifornia  Institute  of  Technology▼bBiology  and  Biological  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0037
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357121▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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