본문

서브메뉴

Exploring the Structural Determinants of Ebolavirus Matrix Protein (VP40) Dimer Interface: Biophysical and Peptidomimetic Analysis of Dimer Stability
Exploring the Structural Determinants of Ebolavirus Matrix Protein (VP40) Dimer Interface:...
Exploring the Structural Determinants of Ebolavirus Matrix Protein (VP40) Dimer Interface: Biophysical and Peptidomimetic Analysis of Dimer Stability

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211151408
ISBN  
9798342103527
DDC  
500
저자명  
Saxena, Roopashi.
서명/저자  
Exploring the Structural Determinants of Ebolavirus Matrix Protein (VP40) Dimer Interface: Biophysical and Peptidomimetic Analysis of Dimer Stability
발행사항  
[Sl] : Purdue University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
167 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
주기사항  
Advisor: Stahelin, Robert.
학위논문주기  
Thesis (Ph.D.)--Purdue University, 2024.
초록/해제  
요약Ebola virus is an enveloped filamentous shaped RNA virus which causes severe hemorrhagic fever in humans. Multiple outbreaks of different strains of ebolavirus have been reported in the past years with limited therapeutics available for treatment. Despite some advances in treatment, there remains a lack of knowledge about the mechanisms of ebolavirus replication in host cells.Ebolavirus encodes for seven structural proteins with matrix protein (VP40) being the most abundantly expressed viral protein. VP40 is essential for viral assembly and budding as expression of VP40 alone is sufficient for formation of virus-like particles (VLPs). VP40 also disassembles during viral entry to help in viral and host cell membrane fusion. Oligomerization of VP40 has been reported to decrease viral replication and transcription. VP40 can perform these diverse functions by virtue of changes in conformation and oligomerization state. VP40 predominantly exists as a dimer through hydrophobic interactions between the alpha helices of the two protomers. Furthermore, VP40 oligomerizes into a hexamer which serves as the structural unit for cylindrical matrix layer formation. VP40 also forms a ring-shaped octamer for regulation of viral transcription. The different oligomeric forms of VP40 exist in an equilibrium for successful viral infection. However, the exact mechanism of formation, stability, and energetics of conversion between these oligomeric forms is unknown.In this study, we performed biophysical analysis on the dimerization interface and identified keystone interactions which when abrogated lead to complete disruption of dimer interface. In addition, peptidomimetics approach was used to design and synthesize a library of compounds to probe the dimerization interface. The compounds were screened using thermal shift assay and then compared using MST and ITC studies. We identified that a peptide mimicking the alpha helical region stabilized by a p-xylene di-cysteine staple was able to bind to VP40 dimer. We also determined that this peptide binds near the dimer interface and was able to slightly shift equilibrium of VP40 dimer towards monomer formation.Overall, this report sheds light on critical interactions required for VP40 dimer formation and stability and introduces use of peptidomimetics to probe for VP40 dimerization interface to understand energetics of oligomerization equilibrium, thereby increasing our knowledge about disease mechanism and paving way for development of therapeutics.
일반주제명  
Plasma
일반주제명  
Glycoproteins
일반주제명  
Reagents
일반주제명  
Hydrogen bonds
일반주제명  
Mutation
일반주제명  
Amino acids
일반주제명  
Heat
일반주제명  
Genomes
일반주제명  
Energy
일반주제명  
Chromatography
일반주제명  
Mutagenesis
일반주제명  
Protein expression
일반주제명  
Crystal structure
일반주제명  
Plasmids
일반주제명  
Epidemics
일반주제명  
Viruses
일반주제명  
Molecular weight
일반주제명  
Ebola virus
일반주제명  
Biophysics
일반주제명  
Epidemiology
일반주제명  
Genetics
일반주제명  
Virology
기타저자  
Purdue University.
기본자료저록  
Dissertations Abstracts International. 86-04B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008250123s2024        us                              c    eng  d
■001000017161527
■00520250211151408
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798342103527
■035    ▼a(MiAaPQ)AAI31285286
■035    ▼a(MiAaPQ)25493446
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a500
■1001  ▼aSaxena,  Roopashi.
■24510▼aExploring  the  Structural  Determinants  of  Ebolavirus  Matrix  Protein  (VP40)  Dimer  Interface:  Biophysical  and  Peptidomimetic  Analysis  of  Dimer  Stability
■260    ▼a[Sl]▼bPurdue  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a167  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-04,  Section:  B.
■500    ▼aAdvisor:  Stahelin,  Robert.
■5021  ▼aThesis  (Ph.D.)--Purdue  University,  2024.
■520    ▼aEbola  virus  is  an  enveloped  filamentous  shaped  RNA  virus  which  causes  severe  hemorrhagic  fever  in  humans.  Multiple  outbreaks  of  different  strains  of  ebolavirus  have  been  reported  in  the  past  years  with  limited  therapeutics  available  for  treatment.  Despite  some  advances  in  treatment,  there  remains  a  lack  of  knowledge  about  the  mechanisms  of  ebolavirus  replication  in  host  cells.Ebolavirus  encodes  for  seven  structural  proteins  with  matrix  protein  (VP40)  being  the  most  abundantly  expressed  viral  protein.  VP40  is  essential  for  viral  assembly  and  budding  as  expression  of  VP40  alone  is  sufficient  for  formation  of  virus-like  particles  (VLPs).  VP40  also  disassembles  during  viral  entry  to  help  in  viral  and  host  cell  membrane  fusion.  Oligomerization  of  VP40  has  been  reported  to  decrease  viral  replication  and  transcription.  VP40  can  perform  these  diverse  functions  by  virtue  of  changes  in  conformation  and  oligomerization  state.  VP40  predominantly  exists  as  a  dimer  through  hydrophobic  interactions  between  the  alpha  helices  of  the  two  protomers.  Furthermore,  VP40  oligomerizes  into  a  hexamer  which  serves  as  the  structural  unit  for  cylindrical  matrix  layer  formation.  VP40  also  forms  a  ring-shaped  octamer  for  regulation  of  viral  transcription.  The  different  oligomeric  forms  of  VP40  exist  in  an  equilibrium  for  successful  viral  infection.  However,  the  exact  mechanism  of  formation,  stability,  and  energetics  of  conversion  between  these  oligomeric  forms  is  unknown.In  this  study,  we  performed  biophysical  analysis  on  the  dimerization  interface  and  identified  keystone  interactions  which  when  abrogated  lead  to  complete  disruption  of  dimer  interface.  In  addition,  peptidomimetics  approach  was  used  to  design  and  synthesize  a  library  of  compounds  to  probe  the  dimerization  interface.  The  compounds  were  screened  using  thermal  shift  assay  and  then  compared  using  MST  and  ITC  studies.  We  identified  that  a  peptide  mimicking  the  alpha  helical  region  stabilized  by  a  p-xylene  di-cysteine  staple  was  able  to  bind  to  VP40  dimer.  We  also  determined  that  this  peptide  binds  near  the  dimer  interface  and  was  able  to  slightly  shift  equilibrium  of  VP40  dimer  towards  monomer  formation.Overall,  this  report  sheds  light  on  critical  interactions  required  for  VP40  dimer  formation  and  stability  and  introduces  use  of  peptidomimetics  to  probe  for  VP40  dimerization  interface  to  understand  energetics  of  oligomerization  equilibrium,  thereby  increasing  our  knowledge  about  disease  mechanism  and  paving  way  for  development  of  therapeutics.
■590    ▼aSchool  code:  0183.
■650  4▼aPlasma
■650  4▼aGlycoproteins
■650  4▼aReagents
■650  4▼aHydrogen  bonds
■650  4▼aMutation
■650  4▼aAmino  acids
■650  4▼aHeat
■650  4▼aGenomes
■650  4▼aEnergy
■650  4▼aChromatography
■650  4▼aMutagenesis
■650  4▼aProtein  expression
■650  4▼aCrystal  structure
■650  4▼aPlasmids
■650  4▼aEpidemics
■650  4▼aViruses
■650  4▼aMolecular  weight
■650  4▼aEbola  virus
■650  4▼aBiophysics
■650  4▼aEpidemiology
■650  4▼aGenetics
■650  4▼aVirology
■690    ▼a0791
■690    ▼a0786
■690    ▼a0766
■690    ▼a0369
■690    ▼a0720
■71020▼aPurdue  University.
■7730  ▼tDissertations  Abstracts  International▼g86-04B.
■790    ▼a0183
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161527▼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
    TF09925 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.