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Engineering Cell-Permeant Mini-Proteins With Enhanced Endosomal Escape for the Delivery of Active Therapeutics.
Engineering Cell-Permeant Mini-Proteins With Enhanced Endosomal Escape for the Delivery of...
Engineering Cell-Permeant Mini-Proteins With Enhanced Endosomal Escape for the Delivery of Active Therapeutics.

상세정보

자료유형  
 학위논문(국외)
기본표목-개인명  
표제와 책임표시사항  
Engineering Cell-Permeant Mini-Proteins With Enhanced Endosomal Escape for the Delivery of Active Therapeutics.
발행, 배포, 간사 사항  
발행, 배포, 간사 사항  
Ann Arbor : ProQuest Dissertations & Theses , 2025
    형태사항  
    125 p.
    일반주기  
    Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
    일반주기  
    Advisor: Schepartz, Alanna.
    학위논문주기  
    Thesis (Ph.D.)--University of California, Berkeley, 2025.
    요약 등 주기  
    요약The therapeutic potential of biologics remains largely constrained by the inability to efficiently deliver proteins into the cytosol, where many critical therapeutic targets reside. This dissertation addresses this fundamental challenge by engineering and characterizing cell-permeant mini-proteins (CPMPs) with enhanced endosomal escape properties, and by developing chemical tools to elucidate their intracellular trafficking mechanisms.In the first part of this work, a structure-guided approach was used to generate AV5.3, a rationally engineered derivative of the mini-protein ZF5.3. AV5.3 exhibits early endosomal escape through pH-triggered unfolding and achieves efficient cytosolic delivery of enzymatic cargos with reduced exposure to lysosomal degradation. Notably, AV5.3 successfully delivered active dihydrofolate reductase (DHFR), rescuing DHFR-deficient mammalian cells and demonstrating its potential as an enzyme replacement therapy.The second portion of this thesis demonstrates that ZF5.3 can be used to deliver RAS-binding monobodies into the cytosol of cancer cells, where they retain functional activity. This work expands the utility of CPMPs for targeting undruggable intracellular proteins and highlights their compatibility with chemically sensitive and functionally diverse cargo proteins.Finally, a novel photocatalytic proximity labeling platform was used to investigate the mechanisms of ZF5.3 uptake. By conjugating ZF5.3 to a blue-light-activated iridium photocatalyst, we aimed to map the proteins in close proximity to ZF5.3 during endocytic trafficking. While proteomic analysis confirmed engagement with clathrin-mediated pathways, limited reproducibility across replicates revealed the need for orthogonal methods and next-generation labeling platforms with improved specificity.Together, this work presents a comprehensive strategy for improving the cytosolic delivery of therapeutic proteins through protein engineering and mechanistic interrogation. These advances provide a strong foundation for developing next-generation delivery platforms and for targeting currently inaccessible intracellular disease pathways.
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    주제명부출표목-일반주제명  
    비통제 색인어  
    비통제 색인어  
    비통제 색인어  
    비통제 색인어  
    비통제 색인어  
    비통제 색인어  
    부출표목-단체명  
    기본자료저록  
    Dissertations Abstracts International. 87-04B.
    전자적 위치 및 접속  
     원문정보보기

    MARC

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    ■006m          o    d                
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    ■020    ▼a9798293893423
    ■035    ▼a(MiAaPQ)AAI32236520
    ■040    ▼aMiAaPQ▼cMiAaPQ
    ■0820  ▼a540
    ■1001  ▼aVazquez  Maldonado,  Angel  Luis.
    ■24510▼aEngineering  Cell-Permeant  Mini-Proteins  With  Enhanced  Endosomal  Escape  for  the  Delivery  of  Active  Therapeutics.
    ■260    ▼a[S.l.]▼bUniversity  of  California,  Berkeley.  ▼c2025
    ■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
    ■300    ▼a125  p.
    ■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-04,  Section:  B.
    ■500    ▼aAdvisor:  Schepartz,  Alanna.
    ■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2025.
    ■520    ▼aThe  therapeutic  potential  of  biologics  remains  largely  constrained  by  the  inability  to  efficiently  deliver  proteins  into  the  cytosol,  where  many  critical  therapeutic  targets  reside.  This  dissertation  addresses  this  fundamental  challenge  by  engineering  and  characterizing  cell-permeant  mini-proteins  (CPMPs)  with  enhanced  endosomal  escape  properties,  and  by  developing  chemical  tools  to  elucidate  their  intracellular  trafficking  mechanisms.In  the  first  part  of  this  work,  a  structure-guided  approach  was  used  to  generate  AV5.3,  a  rationally  engineered  derivative  of  the  mini-protein  ZF5.3.  AV5.3  exhibits  early  endosomal  escape  through  pH-triggered  unfolding  and  achieves  efficient  cytosolic  delivery  of  enzymatic  cargos  with  reduced  exposure  to  lysosomal  degradation.  Notably,  AV5.3  successfully  delivered  active  dihydrofolate  reductase  (DHFR),  rescuing  DHFR-deficient  mammalian  cells  and  demonstrating  its  potential  as  an  enzyme  replacement  therapy.The  second  portion  of  this  thesis  demonstrates  that  ZF5.3  can  be  used  to  deliver  RAS-binding  monobodies  into  the  cytosol  of  cancer  cells,  where  they  retain  functional  activity.  This  work  expands  the  utility  of  CPMPs  for  targeting  undruggable  intracellular  proteins  and  highlights  their  compatibility  with  chemically  sensitive  and  functionally  diverse  cargo  proteins.Finally,  a  novel  photocatalytic  proximity  labeling  platform  was  used  to  investigate  the  mechanisms  of  ZF5.3  uptake.  By  conjugating  ZF5.3  to  a  blue-light-activated  iridium  photocatalyst,  we  aimed  to  map  the  proteins  in  close  proximity  to  ZF5.3  during  endocytic  trafficking.  While  proteomic  analysis  confirmed  engagement  with  clathrin-mediated  pathways,  limited  reproducibility  across  replicates  revealed  the  need  for  orthogonal  methods  and  next-generation  labeling  platforms  with  improved  specificity.Together,  this  work  presents  a  comprehensive  strategy  for  improving  the  cytosolic  delivery  of  therapeutic  proteins  through  protein  engineering  and  mechanistic  interrogation.  These  advances  provide  a  strong  foundation  for  developing  next-generation  delivery  platforms  and  for  targeting  currently  inaccessible  intracellular  disease  pathways.
    ■590    ▼aSchool  code:  0028.
    ■650  4▼aChemistry.
    ■650  4▼aMolecular  biology.
    ■650  4▼aCellular  biology.
    ■650  4▼aBiochemistry.
    ■653    ▼aDelivery
    ■653    ▼aEscape
    ■653    ▼aMicroscopy
    ■653    ▼aPeptides
    ■653    ▼aProteins
    ■653    ▼aTherapeutics
    ■690    ▼a0485
    ■690    ▼a0307
    ■690    ▼a0379
    ■690    ▼a0487
    ■71020▼aUniversity  of  California,  Berkeley▼bChemistry.
    ■7730  ▼tDissertations  Abstracts  International▼g87-04B.
    ■790    ▼a0028
    ■791    ▼aPh.D.
    ■792    ▼a2025
    ■793    ▼aEnglish
    ■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359340▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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