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Revealing Kinetics of Protein Unfolding with a High-Throughput Microfluidic Platform
Revealing Kinetics of Protein Unfolding with a High-Throughput Microfluidic Platform
Revealing Kinetics of Protein Unfolding with a High-Throughput Microfluidic Platform

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202104742
ISBN  
9798290651880
DDC  
500
저자명  
Atsavapranee, Beatriz Shue-Yi.
서명/저자  
Revealing Kinetics of Protein Unfolding with a High-Throughput Microfluidic Platform
발행사항  
[Sl] : Stanford University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
145 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
주기사항  
Advisor: Fordyce, Polly.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2024.
초록/해제  
요약Proteins underpin a vast number of essential functions in the cell. To perform these diverse roles, proteins must fold from a linear chain of amino acids into a three-dimensional structure. Even after reaching this state, proteins repeatedly sample other conformations, where thermodynamics and kinetics determine the probability and rate of each transition. Quantitatively mapping the physical parameters that dictate protein stability is therefore critical to predict how mutations impact function in disease and inform the design of proteins with desired functions. This thesis explores the development and application of approaches to quantify thermodynamic stability at various scales. Beyond thermodynamic stability, kinetic stability is essential for proteins to maintain their native conformation over biologically relevant timescales. Despite this critical role, we lack systematic measurements of protein kinetic stability, which are necessary to understand how changes in sequence impact the abundance and lifetime of proteins. To address this challenge, we introduce SPARKfold (Simultaneous Proteolysis Assay Revealing Kinetics of Folding), a high-throughput microfluidic assay for measuring protein kinetic stability. By studying dihydrofolate reductase (DHFR), we demonstrate that SPARKfold can capture subtle variations in unfolding rates across a wide dynamic range, revealing how changes in protein sequence alter kinetic stability. SPARKfold enables systematic studies of diverse protein systems and variants, providing a powerful tool for uncovering the determinants of kinetic stability. In the future, this versatile platform promises to address both fundamental questions and practical challenges in protein science, from unraveling the role of kinetic stability in cellular function to exploring the design of hyperstable proteins for industrial use. By providing a framework for integrating thermodynamic and kinetic measurements, this work advances our understanding of protein stability while informing future efforts to explore and engineer folding and function.
일반주제명  
Neurodegeneration
일반주제명  
Dihydrofolate reductase
일반주제명  
Protein folding
일반주제명  
Thermodynamics
일반주제명  
Bioinformatics
일반주제명  
Disease
일반주제명  
Biochemistry
일반주제명  
Mutation
일반주제명  
Life sciences
일반주제명  
Chemistry
일반주제명  
Amino acids
일반주제명  
Amyotrophic lateral sclerosis
일반주제명  
Neurosciences
일반주제명  
Biology
일반주제명  
Energy
일반주제명  
Homeostasis
일반주제명  
Bioengineering
일반주제명  
Kinetics
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-01B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aAtsavapranee,  Beatriz  Shue-Yi.
■24510▼aRevealing  Kinetics  of  Protein  Unfolding  with  a  High-Throughput  Microfluidic  Platform
■260    ▼a[Sl]▼bStanford  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
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■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-01,  Section:  B.
■500    ▼aAdvisor:  Fordyce,  Polly.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2024.
■520    ▼aProteins  underpin  a  vast  number  of  essential  functions  in  the  cell.  To  perform  these  diverse  roles,  proteins  must  fold  from  a  linear  chain  of  amino  acids  into  a  three-dimensional  structure.  Even  after  reaching  this  state,  proteins  repeatedly  sample  other  conformations,  where  thermodynamics  and  kinetics  determine  the  probability  and  rate  of  each  transition.  Quantitatively  mapping  the  physical  parameters  that  dictate  protein  stability  is  therefore  critical  to  predict  how  mutations  impact  function  in  disease  and  inform  the  design  of  proteins  with  desired  functions.  This  thesis  explores  the  development  and  application  of  approaches  to  quantify  thermodynamic  stability  at  various  scales.  Beyond  thermodynamic  stability,  kinetic  stability  is  essential  for  proteins  to  maintain  their  native  conformation  over  biologically  relevant  timescales.  Despite  this  critical  role,  we  lack  systematic  measurements  of  protein  kinetic  stability,  which  are  necessary  to  understand  how  changes  in  sequence  impact  the  abundance  and  lifetime  of  proteins.  To  address  this  challenge,  we  introduce  SPARKfold  (Simultaneous  Proteolysis  Assay  Revealing  Kinetics  of  Folding),  a  high-throughput  microfluidic  assay  for  measuring  protein  kinetic  stability.  By  studying  dihydrofolate  reductase  (DHFR),  we  demonstrate  that  SPARKfold  can  capture  subtle  variations  in  unfolding  rates  across  a  wide  dynamic  range,  revealing  how  changes  in  protein  sequence  alter  kinetic  stability.  SPARKfold  enables  systematic  studies  of  diverse  protein  systems  and  variants,  providing  a  powerful  tool  for  uncovering  the  determinants  of  kinetic  stability.  In  the  future,  this  versatile  platform  promises  to  address  both  fundamental  questions  and  practical  challenges  in  protein  science,  from  unraveling  the  role  of  kinetic  stability  in  cellular  function  to  exploring  the  design  of  hyperstable  proteins  for  industrial  use.  By  providing  a  framework  for  integrating  thermodynamic  and  kinetic  measurements,  this  work  advances  our  understanding  of  protein  stability  while  informing  future  efforts  to  explore  and  engineer  folding  and  function.
■590    ▼aSchool  code:  0212.
■650  4▼aNeurodegeneration
■650  4▼aDihydrofolate  reductase
■650  4▼aProtein  folding
■650  4▼aThermodynamics
■650  4▼aBioinformatics
■650  4▼aDisease
■650  4▼aBiochemistry
■650  4▼aMutation
■650  4▼aLife  sciences
■650  4▼aChemistry
■650  4▼aAmino  acids
■650  4▼aAmyotrophic  lateral  sclerosis
■650  4▼aNeurosciences
■650  4▼aBiology
■650  4▼aEnergy
■650  4▼aHomeostasis
■650  4▼aBioengineering
■650  4▼aKinetics
■690    ▼a0791
■690    ▼a0202
■690    ▼a0487
■690    ▼a0306
■690    ▼a0348
■690    ▼a0485
■690    ▼a0317
■690    ▼a0715
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-01B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358720▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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