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Evolution of Essential and Ancient Genes: Understanding and Modeling Fitness in Transfer RNAs
Evolution of Essential and Ancient Genes: Understanding and Modeling Fitness in Transfer R...
Evolution of Essential and Ancient Genes: Understanding and Modeling Fitness in Transfer RNAs

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자료유형  
 학위논문 서양
최종처리일시  
20260202105525
ISBN  
9798263342258
DDC  
572.4
저자명  
Wang, Ling.
서명/저자  
Evolution of Essential and Ancient Genes: Understanding and Modeling Fitness in Transfer RNAs
발행사항  
[Sl] : Georgia Institute of Technology, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
158 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Paaby, Annalise.
학위논문주기  
Thesis (Ph.D.)--Georgia Institute of Technology, 2025.
초록/해제  
요약A central question in evolutionary biology is how genes evolve over time and how mutations in those genes affect fitness. How a mutation affects fitness may depend in part upon mutations at other sites. For example, the negative impact of a bad mutation may be compensated by other mutations that restore or enhance function. Understanding this dynamic is crucial to elucidating not just the evolution of genes, but the evolution of complex traits, including interactions between genes.This thesis is structured into three related projects that examine the following fundamental questions: 1. How do genes evolve, and what does the compensatory evolution pattern of single-copy genes look like? Specifically, I explored mutations in mitochondrial tRNAs (mt-tRNAs) in Caenorhabditis nematodes to identify patterns of compensatory evolution over short and intermediate evolutionary timescales, including interactions between mt-tRNAs and associated factors encoded in the nuclear genome. 2. To what extent can computational techniques enhance our understanding of the impact of mutations, particularly on overall fitness? In this project, I utilized experimentally derived fitness estimates for thousands of S. cerevisiae allelic variants of a nuclear-encoded arginine tRNA (tRNACCU). I assessed how well computational inferences from sequence information, such as secondary structure prediction and the minimum free energy folding score, explained fitness variation. 3. Can machine learning improve upon computational fitness prediction and address the limitations of existing prediction tools? In this project, I developed an inclusive machine learning model that integrates multiple features to estimate fitness from sequence data. Together, these studies aim to provide a more comprehensive understanding of the dynamics of tRNA evolution by combining advanced computational techniques with concepts of evolutionary biology.
일반주제명  
Protein synthesis
일반주제명  
CRISPR
일반주제명  
Biosynthesis
일반주제명  
Mutation
일반주제명  
Genetic engineering
일반주제명  
Amino acids
일반주제명  
Feature selection
일반주제명  
Genomes
일반주제명  
Energy
일반주제명  
Genes
일반주제명  
Nematodes
일반주제명  
Mutagenesis
일반주제명  
Polypeptides
일반주제명  
Transfer RNA
일반주제명  
Animal reproduction
일반주제명  
Animal sciences
일반주제명  
Bioinformatics
일반주제명  
Genetics
일반주제명  
Parasitology
일반주제명  
Engineering
기타저자  
Georgia Institute of Technology.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■5021  ▼aThesis  (Ph.D.)--Georgia  Institute  of  Technology,  2025.
■520    ▼aA  central  question  in  evolutionary  biology  is  how  genes  evolve  over  time  and  how  mutations  in  those  genes  affect  fitness.  How  a  mutation  affects  fitness  may  depend  in  part  upon  mutations  at  other  sites.  For  example,  the  negative  impact  of  a  bad  mutation  may  be  compensated  by  other  mutations  that  restore  or  enhance  function.  Understanding  this  dynamic  is  crucial  to  elucidating  not  just  the  evolution  of  genes,  but  the  evolution  of  complex  traits,  including  interactions  between  genes.This  thesis  is  structured  into  three  related  projects  that  examine  the  following  fundamental  questions:  1.  How  do  genes  evolve,  and  what  does  the  compensatory  evolution  pattern  of  single-copy  genes  look  like?  Specifically,  I  explored  mutations  in  mitochondrial  tRNAs  (mt-tRNAs)  in  Caenorhabditis  nematodes  to  identify  patterns  of  compensatory  evolution  over  short  and  intermediate  evolutionary  timescales,  including  interactions  between  mt-tRNAs  and  associated  factors  encoded  in  the  nuclear  genome.  2.  To  what  extent  can  computational  techniques  enhance  our  understanding  of  the  impact  of  mutations,  particularly  on  overall  fitness?  In  this  project,  I  utilized  experimentally  derived  fitness  estimates  for  thousands  of  S.  cerevisiae  allelic  variants  of  a  nuclear-encoded  arginine  tRNA  (tRNACCU).  I  assessed  how  well  computational  inferences  from  sequence  information,  such  as  secondary  structure  prediction  and  the  minimum  free  energy  folding  score,  explained  fitness  variation.  3.  Can  machine  learning  improve  upon  computational  fitness  prediction  and  address  the  limitations  of  existing  prediction  tools?  In  this  project,  I  developed  an  inclusive  machine  learning  model  that  integrates  multiple  features  to  estimate  fitness  from  sequence  data.  Together,  these  studies  aim  to  provide  a  more  comprehensive  understanding  of  the  dynamics  of  tRNA  evolution  by  combining  advanced  computational  techniques  with  concepts  of  evolutionary  biology.
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■650  4▼aProtein  synthesis
■650  4▼aCRISPR
■650  4▼aBiosynthesis
■650  4▼aMutation
■650  4▼aGenetic  engineering
■650  4▼aAmino  acids
■650  4▼aFeature  selection
■650  4▼aGenomes
■650  4▼aEnergy
■650  4▼aGenes
■650  4▼aNematodes
■650  4▼aMutagenesis
■650  4▼aPolypeptides
■650  4▼aTransfer  RNA
■650  4▼aAnimal  reproduction
■650  4▼aAnimal  sciences
■650  4▼aBioinformatics
■650  4▼aGenetics
■650  4▼aParasitology
■650  4▼aEngineering
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■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360435▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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