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Constraint-Based Methods for Macromolecular Structure Prediction and Multi-Conformer Refinement
Constraint-Based Methods for Macromolecular Structure Prediction and Multi-Conformer Refin...
Constraint-Based Methods for Macromolecular Structure Prediction and Multi-Conformer Refinement

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105157
ISBN  
9798273306967
DDC  
530
저자명  
Mandaiya, Avinash.
서명/저자  
Constraint-Based Methods for Macromolecular Structure Prediction and Multi-Conformer Refinement
발행사항  
[Sl] : Cornell University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
111 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-07, Section: B.
주기사항  
Advisor: Elser, Veit.
학위논문주기  
Thesis (Ph.D.)--Cornell University, 2025.
초록/해제  
요약This dissertation addresses fundamental challenges in structural biology through the development and application of constraint satisfaction formulations, which are effectively solved using iterative projection methods such as Reflect-Reflect-Relax (RRR). We demonstrate how the divide-and-concur framework, when combined with these methods, can successfully tackle complex structural problems that require the satisfaction of multiple constraints involving molecular geometry, X-ray contrast (electron charge density), and energy models. We begin with a proof-of-concept study involving simplified two-dimensional lattice proteins, composed of only two residues, H (hydrophobic) and P (polar), designed to capture the essential features of globular protein folding. This study establishes the viability of constraint-based approaches for structural prediction problems, demonstrating their effectiveness in solving such systems. Building upon this foundation, we utilize the divide-and-concur framework to address the real protein folding challenge. While protein folding involves complex thermodynamic processes that require a delicate balance of multiple physical forces, our constraint-based approach effectively approximates traditional force field models while offering significant computational advantages. The key innovation lies in incorporating interpretable constraints through the divide-and-concur framework, which systematically reduces the conformational search space. This enhancement enables ab initio folding of miniproteins on standard commercial computers within minutes, representing a substantial improvement in computational efficiency. The versatility of constraint-based methods extends beyond protein folding to other critical structural biology applications, particularly in multi-conformer refinement problems where configuration tangling phenomena arise. The modular nature of the divide-and-concur framework facilitates seamless integration of density constraints, making it particularly well-suited for multi-constraint optimization problems. This work establishes constraint-based approaches as powerful tools for tackling some of the most computationally demanding problems in modern structural biology.
일반주제명  
Physics
일반주제명  
Biology
일반주제명  
Molecular biology
키워드  
Reflect-Reflect-Relax
키워드  
Lattice proteins
키워드  
Computational efficiency
키워드  
Structural biology
기타저자  
Cornell University Physics
기본자료저록  
Dissertations Abstracts International. 87-07B.
전자적 위치 및 접속  
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■1001  ▼aMandaiya,  Avinash.
■24510▼aConstraint-Based  Methods  for  Macromolecular  Structure  Prediction  and  Multi-Conformer  Refinement
■260    ▼a[Sl]▼bCornell  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a111  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-07,  Section:  B.
■500    ▼aAdvisor:  Elser,  Veit.
■5021  ▼aThesis  (Ph.D.)--Cornell  University,  2025.
■520    ▼aThis  dissertation  addresses  fundamental  challenges  in  structural  biology  through  the  development  and  application  of  constraint  satisfaction  formulations,  which  are  effectively  solved  using  iterative  projection  methods  such  as  Reflect-Reflect-Relax  (RRR).  We  demonstrate  how  the  divide-and-concur  framework,  when  combined  with  these  methods,  can  successfully  tackle  complex  structural  problems  that  require  the  satisfaction  of  multiple  constraints  involving  molecular  geometry,  X-ray  contrast  (electron  charge  density),  and  energy  models.            We  begin  with  a  proof-of-concept  study  involving  simplified  two-dimensional  lattice  proteins,  composed  of  only  two  residues,  H  (hydrophobic)  and  P  (polar),  designed  to  capture  the  essential  features  of  globular  protein  folding.  This  study  establishes  the  viability  of  constraint-based  approaches  for  structural  prediction  problems,  demonstrating  their  effectiveness  in  solving  such  systems.            Building  upon  this  foundation,  we  utilize  the  divide-and-concur  framework  to  address  the  real  protein  folding  challenge.  While  protein  folding  involves  complex  thermodynamic  processes  that  require  a  delicate  balance  of  multiple  physical  forces,  our  constraint-based  approach  effectively  approximates  traditional  force  field  models  while  offering  significant  computational  advantages.  The  key  innovation  lies  in  incorporating  interpretable  constraints  through  the  divide-and-concur  framework,  which  systematically  reduces  the  conformational  search  space.  This  enhancement  enables  ab  initio  folding  of  miniproteins  on  standard  commercial  computers  within  minutes,  representing  a  substantial  improvement  in  computational  efficiency.            The  versatility  of  constraint-based  methods  extends  beyond  protein  folding  to  other  critical  structural  biology  applications,  particularly  in  multi-conformer  refinement  problems  where  configuration  tangling  phenomena  arise.  The  modular  nature  of  the  divide-and-concur  framework  facilitates  seamless  integration  of  density  constraints,  making  it  particularly  well-suited  for  multi-constraint  optimization  problems.  This  work  establishes  constraint-based  approaches  as  powerful  tools  for  tackling  some  of  the  most  computationally  demanding  problems  in  modern  structural  biology.
■590    ▼aSchool  code:  0058.
■650  4▼aPhysics
■650  4▼aBiology
■650  4▼aMolecular  biology
■653    ▼aReflect-Reflect-Relax
■653    ▼aLattice  proteins
■653    ▼aComputational  efficiency
■653    ▼aStructural  biology
■690    ▼a0605
■690    ▼a0306
■690    ▼a0307
■71020▼aCornell  University▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g87-07B.
■790    ▼a0058
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359679▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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