본문

서브메뉴

Structures and Mechanisms of Protein Channels- [electronic resource]
Structures and Mechanisms of Protein Channels - [electronic resource]
Structures and Mechanisms of Protein Channels- [electronic resource]

상세정보

자료유형  
 학위논문파일 국외
최종처리일시  
20240214101642
ISBN  
9798380366809
DDC  
574
저자명  
Tucker, Kyle C.
서명/저자  
Structures and Mechanisms of Protein Channels - [electronic resource]
발행사항  
[S.l.]: : University of California, Berkeley., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(85 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
주기사항  
Advisor: Brohawn, Stephen.
학위논문주기  
Thesis (Ph.D.)--University of California, Berkeley, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Proteins are biological machines composed of a single or multiple threads of amino acids which fold into three-dimensional shapes. These shapes and surfaces directly participate in many of the molecular interactions essential to life. Some proteins exist in lipid membranes and thus have been termed membrane proteins. Membranes serve as sites of import, export, and signaling and allow for compartmentalization; all critical functions for living organisms. After decades of research throughout the 20th century, many families of membrane proteins were revealed to form transport proteins that facilitate movement of substrates across membranes. The general group of transport proteins can be further divided into two groups: active and passive transporters. Passive transport proteins have been called channels, given their observed activity of opening to allow substrate diffusion down an electrochemical gradient. Channels are diverse both in their architecture and substrates, which include ions, small molecules, and other proteins. Despite the broad importance of channels in a vast array of biology many aspects of how these machines operate at a molecular level are yet to be revealed. Determining the structures of channels, which in many cases was not technically feasible until recently, has provided key insights into the form and function of these intricate machines. Presented here are studies of two different channels: the Translocase of the Outer Mitochondrial Membrane (TOM complex) and the light-gated ion channel, ChRmine.The first study in this thesis examines the long-awaited architecture and transport mechanisms of the major protein gate of the outer mitochondrial membrane. The high-resolution structure of the TOM complex revealed its overall organization- including all its core subunits, multiple assemblies of the complex, and a glimpse at the pore which provides insights into mechanisms of protein transport. The subsequent study examines the first ever structures of a light-gated ion channel in a native-like membrane environment, using lipid nanodiscs and cryogenic electron-microscopy(cryo-EM). Determining cryo-EM structures of ChRmine was a technical achievement and revealed its surprising trimeric assembly, ion conduction path, and retinal binding pocket. Through analysis of the structure, we were able to tune the kinetics of ChRmine using a rational engineering approach. Lastly, the latest work on ChRmine paves the path for the determination of structures previously too dynamic to capture. These elusive structures are attractive targets because they could lay the foundation for building the next generation of tools for studying the brain.
일반주제명  
Biochemistry.
일반주제명  
Biophysics.
일반주제명  
Molecular biology.
일반주제명  
Cellular biology.
키워드  
Channels
키워드  
ChRmine
키워드  
TOM complex
키워드  
Proteins
키워드  
Cryogenic electron-microscopy
기타저자  
University of California, Berkeley Molecular & Cell Biology
기본자료저록  
Dissertations Abstracts International. 85-03B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008240612s2023      us  |||||||||||||||c||eng  d
■001000016934684
■00520240214101642
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798380366809
■035    ▼a(MiAaPQ)AAI30632885
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574
■1001  ▼aTucker,  Kyle  C.
■24510▼aStructures  and  Mechanisms  of  Protein  Channels▼h[electronic  resource]
■260    ▼a[S.l.]:▼bUniversity  of  California,  Berkeley.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(85  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  B.
■500    ▼aAdvisor:  Brohawn,  Stephen.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aProteins  are  biological  machines  composed  of  a  single  or  multiple  threads  of  amino  acids  which  fold  into  three-dimensional  shapes.  These  shapes  and  surfaces  directly  participate  in  many  of  the  molecular  interactions  essential  to  life.  Some  proteins  exist  in  lipid  membranes  and  thus  have  been  termed  membrane  proteins.  Membranes  serve  as  sites  of  import,  export,  and  signaling  and  allow  for  compartmentalization;  all  critical  functions  for  living  organisms.  After  decades  of  research  throughout  the  20th  century,  many  families  of  membrane  proteins  were  revealed  to  form  transport  proteins  that  facilitate  movement  of  substrates  across  membranes.  The  general  group  of  transport  proteins  can  be  further  divided  into  two  groups:  active  and  passive  transporters.  Passive  transport  proteins  have  been  called  channels,  given  their  observed  activity  of  opening  to  allow  substrate  diffusion  down  an  electrochemical  gradient.  Channels  are  diverse  both  in  their  architecture  and  substrates,  which  include  ions,  small  molecules,  and  other  proteins.  Despite  the  broad  importance  of  channels  in  a  vast  array  of  biology  many  aspects  of  how  these  machines  operate  at  a  molecular  level  are  yet  to  be  revealed.  Determining  the  structures  of  channels,  which  in  many  cases  was  not  technically  feasible  until  recently,  has  provided  key  insights  into  the  form  and  function  of  these  intricate  machines.  Presented  here  are  studies  of  two  different  channels:  the  Translocase  of  the  Outer  Mitochondrial  Membrane  (TOM  complex)  and  the  light-gated  ion  channel,  ChRmine.The  first  study  in  this  thesis  examines  the  long-awaited  architecture  and  transport  mechanisms  of  the  major  protein  gate  of  the  outer  mitochondrial  membrane.  The  high-resolution  structure  of  the  TOM  complex  revealed  its  overall  organization-  including  all  its  core  subunits,  multiple  assemblies  of  the  complex,  and  a  glimpse  at  the  pore  which  provides  insights  into  mechanisms  of  protein  transport.  The  subsequent  study  examines  the  first  ever  structures  of  a  light-gated  ion  channel  in  a  native-like  membrane  environment,  using  lipid  nanodiscs  and  cryogenic  electron-microscopy(cryo-EM).  Determining  cryo-EM  structures  of  ChRmine  was  a  technical  achievement  and  revealed  its  surprising  trimeric  assembly,  ion  conduction  path,  and  retinal  binding  pocket.  Through  analysis  of  the  structure,  we  were  able  to  tune  the  kinetics  of  ChRmine  using  a  rational  engineering  approach.  Lastly,  the  latest  work  on  ChRmine  paves  the  path  for  the  determination  of  structures  previously  too  dynamic  to  capture.  These  elusive  structures  are  attractive  targets  because  they  could  lay  the  foundation  for  building  the  next  generation  of  tools  for  studying  the  brain.
■590    ▼aSchool  code:  0028.
■650  4▼aBiochemistry.
■650  4▼aBiophysics.
■650  4▼aMolecular  biology.
■650  4▼aCellular  biology.
■653    ▼aChannels
■653    ▼aChRmine
■653    ▼aTOM  complex
■653    ▼aProteins
■653    ▼aCryogenic  electron-microscopy
■690    ▼a0487
■690    ▼a0786
■690    ▼a0307
■690    ▼a0379
■71020▼aUniversity  of  California,  Berkeley▼bMolecular  &  Cell  Biology.
■7730  ▼tDissertations  Abstracts  International▼g85-03B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0028
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16934684▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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
    TF09433 전자도서 마이폴더 부재도서신고 비도서대출신청

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

    해당 도서를 다른 이용자가 함께 대출한 도서

    관련 인기도서

    로그인 후 이용 가능합니다.