본문

서브메뉴

Elucidating the Subcellular Organization of Endogenous G Protein Activation by GPCRs
Elucidating the Subcellular Organization of Endogenous G Protein Activation by GPCRs
Elucidating the Subcellular Organization of Endogenous G Protein Activation by GPCRs

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202103203
ISBN  
9798280748453
DDC  
574
저자명  
Wysolmerski, Brian.
서명/저자  
Elucidating the Subcellular Organization of Endogenous G Protein Activation by GPCRs
발행사항  
[Sl] : University of California, San Francisco, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
145 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Includes supplementary digital materials.
주기사항  
Advisor: von Zastrow, Mark;Jura, Natalia.
학위논문주기  
Thesis (Ph.D.)--University of California, San Francisco, 2025.
초록/해제  
요약Many GPCRs are now recognized to trigger a second phase of G protein signaling from endosomes. The presence of activated GPCRs on endosomes has been clearly shown, especially among Gs-coupled GPCRs, but endosomal signaling ultimately requires activation of the G protein, which mediates downstream signal transduction. How GPCRs regulate both G protein abundance and G protein activation on endosomes is incompletely understood. In this dissertation, I address this question by dissecting the regulation of GPCR-triggered G protein localization to and activation on endosomes. I first verify that activation of a model GPCR, the β2AR, at the plasma membrane drives translocation of Gαs to endosomes separately from trafficking of the activated receptor. Focusing on VIPR1, a GPCR that produces a well-resolved endosomal signal, I demonstrate the presence of active-state, endogenous Gαs at both the plasma membrane and endosomes, and I show that Gαs activation on endosomes is dependent on receptor endocytosis. I also detect VIPR1-mediated stimulation of an additional component of endogenous G protein activity, which I ascribe to Gαq/11, consistent with the known dual-coupling ability of VIPR1. Interestingly, VIPR1 preferentially activates Gαq/11 on the plasma membrane but Gαs on endosomes, and I further show location-specific preferences in Gαs and Gαq/11 activation by a second GPCR, the A2BR. Next, I investigate the mechanisms of reversible Gαs redistribution to endosomes. I confirm that Gαs dissociates from the plasma membrane after GPCR activation, samples endosomes and additional internal compartments, and returns to the plasma membrane after GPCR inactivation through a non-vesicular pathway. My results provide critical insights into the subcellular organization of G protein activation. Additionally, they uncover a new layer of location bias in cellular GPCR signaling, defined by changes in GPCR-G protein coupling at different subcellular locations.
일반주제명  
Biology
일반주제명  
Cellular biology
일반주제명  
Molecular biology
일반주제명  
Biochemistry
키워드  
Endosomal signaling
키워드  
G protein trafficking
키워드  
GPCR signaling
키워드  
Gs-cAMP signaling
키워드  
Subcellular
기타저자  
University of California, San Francisco Biochemistry and Molecular Biology
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008260126s2025        us                              c    eng  d
■001000017357292
■00520260202103203
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798280748453
■035    ▼a(MiAaPQ)AAI31999379
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574
■1001  ▼aWysolmerski,  Brian.▼0(orcid)0000-0002-4042-8269
■24510▼aElucidating  the  Subcellular  Organization  of  Endogenous  G  Protein  Activation  by  GPCRs
■260    ▼a[Sl]▼bUniversity  of  California,  San  Francisco▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a145  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aIncludes  supplementary  digital  materials.
■500    ▼aAdvisor:  von  Zastrow,  Mark;Jura,  Natalia.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  San  Francisco,  2025.
■520    ▼aMany  GPCRs  are  now  recognized  to  trigger  a  second  phase  of  G  protein  signaling  from  endosomes.  The  presence  of  activated  GPCRs  on  endosomes  has  been  clearly  shown,  especially  among  Gs-coupled  GPCRs,  but  endosomal  signaling  ultimately  requires  activation  of  the  G  protein,  which  mediates  downstream  signal  transduction.  How  GPCRs  regulate  both  G  protein  abundance  and  G  protein  activation  on  endosomes  is  incompletely  understood.  In  this  dissertation,  I  address  this  question  by  dissecting  the  regulation  of  GPCR-triggered  G  protein  localization  to  and  activation  on  endosomes.  I  first  verify  that  activation  of  a  model  GPCR,  the  β2AR,  at  the  plasma  membrane  drives  translocation  of  Gαs  to  endosomes  separately  from  trafficking  of  the  activated  receptor.  Focusing  on  VIPR1,  a  GPCR  that  produces  a  well-resolved  endosomal  signal,  I  demonstrate  the  presence  of  active-state,  endogenous  Gαs  at  both  the  plasma  membrane  and  endosomes,  and  I  show  that  Gαs  activation  on  endosomes  is  dependent  on  receptor  endocytosis.  I  also  detect  VIPR1-mediated  stimulation  of  an  additional  component  of  endogenous  G  protein  activity,  which  I  ascribe  to  Gαq/11,  consistent  with  the  known  dual-coupling  ability  of  VIPR1.  Interestingly,  VIPR1  preferentially  activates  Gαq/11  on  the  plasma  membrane  but  Gαs  on  endosomes,  and  I  further  show  location-specific  preferences  in  Gαs  and  Gαq/11  activation  by  a  second  GPCR,  the  A2BR.  Next,  I  investigate  the  mechanisms  of  reversible  Gαs  redistribution  to  endosomes.  I  confirm  that  Gαs  dissociates  from  the  plasma  membrane  after  GPCR  activation,  samples  endosomes  and  additional  internal  compartments,  and  returns  to  the  plasma  membrane  after  GPCR  inactivation  through  a  non-vesicular  pathway.  My  results  provide critical  insights  into  the  subcellular  organization  of  G  protein  activation.  Additionally,  they  uncover  a  new  layer  of  location  bias  in  cellular  GPCR  signaling,  defined  by  changes  in  GPCR-G  protein  coupling  at  different  subcellular  locations.
■590    ▼aSchool  code:  0034.
■650  4▼aBiology
■650  4▼aCellular  biology
■650  4▼aMolecular  biology
■650  4▼aBiochemistry
■653    ▼aEndosomal  signaling
■653    ▼aG  protein  trafficking
■653    ▼aGPCR  signaling
■653    ▼aGs-cAMP  signaling
■653    ▼aSubcellular
■690    ▼a0306
■690    ▼a0379
■690    ▼a0307
■690    ▼a0487
■71020▼aUniversity  of  California,  San  Francisco▼bBiochemistry  and  Molecular  Biology.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0034
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357292▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

Preview

Export

ChatGPT Discussion

AI Recommended Related Books


    New Books MORE
    Statistics for the past 3 years. Go to brief

    Info Détail de la recherche.

    • Réservation
    • n'existe pas
    • My Folder
    • Demande Première utilisation
    • Non-Book Loan Application
    • Nighttime Book Loan Application
    Matériel
    Reg No. Call No. emplacement Status Lend Info
    TF17740 전자도서 대출가능 My Folder 부재도서신고 비도서대출신청 야간 도서대출신청

    * Les réservations sont disponibles dans le livre d'emprunt. Pour faire des réservations, S'il vous plaît cliquer sur le bouton de réservation

    Books borrowed together with this book

    Related Popular Books

    Available after logging in.