본문

서브메뉴

Early-Stage Assembly Landscape for the Large Subunit of the Bacterial Ribosome
Early-Stage Assembly Landscape for the Large Subunit of the Bacterial Ribosome
Early-Stage Assembly Landscape for the Large Subunit of the Bacterial Ribosome

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211151945
ISBN  
9798383164310
DDC  
574
저자명  
Sheng, Kai.
서명/저자  
Early-Stage Assembly Landscape for the Large Subunit of the Bacterial Ribosome
발행사항  
[Sl] : The Scripps Research Institute, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
297 p
주기사항  
Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
주기사항  
Advisor: Williamson, James R.
학위논문주기  
Thesis (Ph.D.)--The Scripps Research Institute, 2024.
초록/해제  
요약Ribosomes play a crucial role in protein translation, and their assembly is both intricate and rapid within cells. For E. coli, it takes approximately two minutes to produce a functional ribosome from scratch. Investigating the complex and rapid folding mechanism of large RNA-protein complexes, such as the ribosome, remains a formidable challenge in structural biology.In Chapter 2, a streamlined pipeline was developed for solving ribosomal large subunit (LSU) assembly intermediates in genetically manipulated strains, such as those depleted of ribosomal proteins and assembly factors. This pipeline, including heterogeneous reconstruction methods, cooperativity assembly block identification, construction of networks between assembly blocks, and delineation of putative assembly pathways, was applied to three datasets: ∆deaD, ∆srmB, and a bL17-depletion strain. This novel approach facilitated the robust discovery of the smallest assembly core containing only 600 nucleotides and four ribosomal proteins, as well as the assembly pathway for early events in LSU solvent-side maturation at the early stage.Chapter 3 utilized this pipeline to discover 14 distinct LSU intermediates ranging from early to late stages in wild-type E. coli grown at 12 ˚C, providing insights into detailed assembly dependencies, including the formation of the central protuberance, stalks, and peptidyl transferase center. Additionally, the serendipitous trapping of an early intermediate by a pseudouridine synthase provided novel insights into early-stage assembly factor binding and substrate recognition.In Chapter 4, specific anti-sense oligonucleotides (ASOs) and their analogs were employed to disrupt native interactions of bacterial ribosomal RNA, capturing assembly intermediates in a near-physiological in vitro reconstitution platform. A screen identified 10 peptide nucleic acid (PNA) hits, with 6 progressing to structure characterization. This effort led to the discovery of 37 structures never reported before, revealing the smallest consensus core comprising 9 helices and 2 proteins. Notably, a major conformational rearrangement for domain III and VI rRNA was observed in a PNA-inhibited library, indicating that intra-domain folding can precede inter-domain docking in LSU assembly. Moreover, this approach further dissected the LSU into 158 structural smaller segments, enabling detailed assembly at single helix resolution, following a template-directed RNA foldon docking mechanism.Subsequently, Chapter 5 established a high-throughput dCas13/sgRNA two-plasmid system for in vivo rRNA targeting. The screening resulted in potential competitors in rRNA folding within the cellular environment. Two of the hits were cloned out and the disruption of LSU assembly has been verified by Cryo-EM single particle analysis. The platform also eluded possible assembly mechanisms in wild type and assembly factor deletion strains.In summary, this thesis successfully streamlined the generation of bacterial LSU assembly intermediates by various perturbations, solved heterogeneous assembly structures using Cryo-EM single particle analysis, and performed dependency and pathway analysis, thereby unveiling a landscape for bacterial LSU assembly.
일반주제명  
Biology
일반주제명  
Biochemistry
일반주제명  
Biophysics
키워드  
Ribosome
키워드  
Nucleotides
키워드  
Anti-sense oligonucleotides
키워드  
Cellular environment
키워드  
Structural biology
기타저자  
The Scripps Research Institute Structural Biology/Biophysics
기본자료저록  
Dissertations Abstracts International. 85-12B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008250123s2024        us                              c    eng  d
■001000017162209
■00520250211151945
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798383164310
■035    ▼a(MiAaPQ)AAI31327714
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a574
■1001  ▼aSheng,  Kai.
■24510▼aEarly-Stage  Assembly  Landscape  for  the  Large  Subunit  of  the  Bacterial  Ribosome
■260    ▼a[Sl]▼bThe  Scripps  Research  Institute▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a297  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-12,  Section:  B.
■500    ▼aAdvisor:  Williamson,  James  R.
■5021  ▼aThesis  (Ph.D.)--The  Scripps  Research  Institute,  2024.
■520    ▼aRibosomes  play  a  crucial  role  in  protein  translation,  and  their  assembly  is  both  intricate  and  rapid  within  cells.  For  E.  coli,  it  takes  approximately  two  minutes  to  produce  a  functional  ribosome  from  scratch.  Investigating  the  complex  and  rapid  folding  mechanism  of  large  RNA-protein  complexes,  such  as  the  ribosome,  remains  a  formidable  challenge  in  structural  biology.In  Chapter  2,  a  streamlined  pipeline  was  developed  for  solving  ribosomal  large  subunit  (LSU)  assembly  intermediates  in  genetically  manipulated  strains,  such  as  those  depleted  of  ribosomal  proteins  and  assembly  factors.  This  pipeline,  including  heterogeneous  reconstruction  methods,  cooperativity  assembly  block  identification,  construction  of  networks  between  assembly  blocks,  and  delineation  of  putative  assembly  pathways,  was  applied  to  three  datasets:  ∆deaD,  ∆srmB,  and  a  bL17-depletion  strain.  This  novel  approach  facilitated  the  robust  discovery  of  the  smallest  assembly  core  containing  only  600  nucleotides  and  four  ribosomal  proteins,  as  well  as  the  assembly  pathway  for  early  events  in  LSU  solvent-side  maturation  at  the  early  stage.Chapter  3  utilized  this  pipeline  to  discover  14  distinct  LSU  intermediates  ranging  from  early  to  late  stages  in  wild-type  E.  coli  grown  at  12  ˚C,  providing  insights  into  detailed  assembly  dependencies,  including  the  formation  of  the  central  protuberance,  stalks,  and  peptidyl  transferase  center.  Additionally,  the  serendipitous  trapping  of  an  early  intermediate  by  a  pseudouridine  synthase  provided  novel  insights  into  early-stage  assembly  factor  binding  and  substrate  recognition.In  Chapter  4,  specific  anti-sense  oligonucleotides  (ASOs)  and  their  analogs  were  employed  to  disrupt  native  interactions  of  bacterial  ribosomal  RNA,  capturing  assembly  intermediates  in  a  near-physiological  in  vitro  reconstitution  platform.  A  screen  identified  10  peptide  nucleic  acid  (PNA)  hits,  with  6  progressing  to  structure  characterization.  This  effort  led  to  the  discovery  of  37  structures  never  reported  before,  revealing  the  smallest  consensus  core  comprising  9  helices  and  2  proteins.  Notably,  a  major  conformational  rearrangement  for  domain  III  and  VI  rRNA  was  observed  in  a  PNA-inhibited  library,  indicating  that  intra-domain  folding  can  precede  inter-domain  docking  in  LSU  assembly.  Moreover,  this  approach  further  dissected  the  LSU  into  158  structural  smaller  segments,  enabling  detailed  assembly  at  single  helix  resolution,  following  a  template-directed  RNA  foldon  docking  mechanism.Subsequently,  Chapter  5  established  a  high-throughput  dCas13/sgRNA  two-plasmid  system  for  in  vivo  rRNA  targeting.  The  screening  resulted  in  potential  competitors  in  rRNA  folding  within  the  cellular  environment.  Two  of  the  hits  were  cloned  out  and  the  disruption  of  LSU  assembly  has  been  verified  by  Cryo-EM  single  particle  analysis.  The  platform  also  eluded  possible  assembly  mechanisms  in  wild  type  and  assembly  factor  deletion  strains.In  summary,  this  thesis  successfully  streamlined  the  generation  of  bacterial  LSU  assembly  intermediates  by  various  perturbations,  solved  heterogeneous  assembly  structures  using  Cryo-EM  single  particle  analysis,  and  performed  dependency  and  pathway  analysis,  thereby  unveiling  a  landscape  for  bacterial  LSU  assembly.
■590    ▼aSchool  code:  1179.
■650  4▼aBiology
■650  4▼aBiochemistry
■650  4▼aBiophysics
■653    ▼aRibosome
■653    ▼aNucleotides
■653    ▼aAnti-sense  oligonucleotides
■653    ▼aCellular  environment
■653    ▼aStructural  biology
■690    ▼a0306
■690    ▼a0487
■690    ▼a0786
■71020▼aThe  Scripps  Research  Institute▼bStructural  Biology/Biophysics.
■7730  ▼tDissertations  Abstracts  International▼g85-12B.
■790    ▼a1179
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162209▼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
    TF13203 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.