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Novel Computational Tools for High Throughput In-Silico Protein-Protein Interaction Screening
Novel Computational Tools for High Throughput In-Silico Protein-Protein Interaction Screen...
Novel Computational Tools for High Throughput In-Silico Protein-Protein Interaction Screening

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202104712
ISBN  
9798265409447
DDC  
574
저자명  
Schmid, Ernst Walter.
서명/저자  
Novel Computational Tools for High Throughput In-Silico Protein-Protein Interaction Screening
발행사항  
[Sl] : Harvard University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
172 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Walter, Johannes.
학위논문주기  
Thesis (Ph.D.)--Harvard University, 2025.
초록/해제  
요약Cells are complex biochemical systems that have evolved elaborate molecular processes to survive and reproduce. Many of these processes involve multiple proteins working together via direct physical interactions. Historically, identifying protein-protein interactions (PPIs) relied on slow, labor-intensive, and inaccurate experimental methods. Recent advances in deep learning have led to new in-silico approaches that can rapidly and accurately predict the structure of proteins and protein complexes from primary amino acid sequence. One of the most prominent examples is AlphaFold-multimer (AF-M), a neural network developed by DeepMind in 2022. Like others, we have begun using AF-M to perform large scale in-silico screens to uncover new PPIs. In my thesis work, I created tools to efficiently conduct AF-M PPI screens and evaluate the results. A core focus of my efforts was the creation of SPOC, a novel machine learning based classifier that examines structural predictions along with experimental omics data to assess the biological relevance of binary AF-M structure predictions. In addition, I built predictomes.org, a web platform that enables users to interact with and interpret massive AF-M screening datasets.As an initial proof of principle, I applied these tools to uncover PPIs in human genome maintenance by predicting structures for nearly all possible pairwise combinations among 300 proteins. The predictions were scored with SPOC and released to the community on predictomes.org. This screen uncovered new interactions and helped reveal mechanistic insights into processes ranging from transcription coupled nucleotide excision repair to DNA replication stalling during stress. In a separate collaborative effort with Dr. Lucas Farnung's lab, I folded the H2A/H2B dimer with nearly all human nuclear proteins to identify proteins that engage with a composite nucleosomal surface known as the acidic patch. I developed an analysis pipeline that identified more than 40 hits, including the E3 ubiquitin ligase SHPRH. The Farnung laboratory used cryo-electron microcopy to solve the structure of SHPRH bound to the nucleosome, revealing an interaction that closely matches the screen's prediction. The repeated success of large-scale AF-M screens has demonstrated their value as powerful hypothesis generators, motivating development of a proteome-wide structural interactome. However, generating structural models for all ~200 million possible human protein pairs was computationally prohibitive. To address this, I developed KIRC, a classifier that rapidly scores and prioritizes likely interactors based on experimental omics data. Leveraging a GPU cluster donated by NVIDIA corporation, I used AF-M to model the top 1.5 million KIRC-nominated pairs and evaluated them with SPOC. Preliminary analysis suggests that the pipeline yielded more than 34,000 high-confidence interactions, many of which are uncharacterized. In summary, my work has produced a suite of computational tools that streamline large- scale in silico PPI screening and help biomedical researchers effectively harness advanced machine learning to accelerate discovery. The all-by-all genome maintenance screen, the acidic patch screen, and several additional collaborative projects with labs at Harvard Medical School collectively highlight the power and versatility of this approach.
일반주제명  
Bioinformatics
일반주제명  
Biochemistry
일반주제명  
Biology
일반주제명  
Molecular biology
키워드  
AlphaFold
키워드  
Predictomes
키워드  
Protein-protein interaction
키워드  
Structure Prediction and Omics-based Classifier
기타저자  
Harvard University Biological and Biomedical Sciences
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aSchmid,  Ernst  Walter.
■24510▼aNovel  Computational  Tools  for  High  Throughput  In-Silico  Protein-Protein  Interaction  Screening
■260    ▼a[Sl]▼bHarvard  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a172  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Walter,  Johannes.
■5021  ▼aThesis  (Ph.D.)--Harvard  University,  2025.
■520    ▼aCells  are  complex  biochemical  systems  that  have  evolved  elaborate  molecular  processes  to  survive  and  reproduce.  Many  of  these  processes  involve  multiple  proteins  working  together  via  direct  physical  interactions.  Historically,  identifying  protein-protein  interactions  (PPIs)  relied  on  slow,  labor-intensive,  and  inaccurate  experimental  methods.  Recent  advances  in  deep  learning  have  led  to  new  in-silico  approaches  that  can  rapidly  and  accurately  predict  the  structure  of  proteins  and  protein  complexes  from  primary  amino  acid  sequence.  One  of  the  most  prominent  examples  is  AlphaFold-multimer  (AF-M),  a  neural  network  developed  by  DeepMind  in  2022.  Like  others,  we  have  begun  using  AF-M  to  perform  large  scale  in-silico  screens  to  uncover  new  PPIs.  In  my  thesis  work,  I  created  tools  to  efficiently  conduct  AF-M  PPI  screens  and  evaluate  the  results.  A  core  focus  of  my  efforts  was  the  creation  of  SPOC,  a  novel  machine  learning  based  classifier  that  examines  structural  predictions  along  with  experimental  omics  data  to  assess  the  biological  relevance  of  binary  AF-M  structure  predictions.  In  addition,  I  built  predictomes.org,  a  web  platform  that  enables  users  to  interact  with  and  interpret  massive  AF-M  screening  datasets.As  an  initial  proof  of  principle,  I  applied  these  tools  to  uncover  PPIs  in  human  genome  maintenance  by  predicting  structures  for  nearly  all  possible  pairwise  combinations  among  300  proteins.  The  predictions  were  scored  with  SPOC  and  released  to  the  community  on  predictomes.org.  This  screen  uncovered  new  interactions  and  helped  reveal  mechanistic  insights  into  processes  ranging  from  transcription  coupled  nucleotide  excision  repair  to  DNA  replication  stalling  during  stress.  In  a  separate  collaborative  effort  with  Dr.  Lucas  Farnung's  lab,  I  folded  the  H2A/H2B  dimer  with  nearly  all  human  nuclear  proteins  to  identify  proteins  that  engage  with  a  composite  nucleosomal  surface  known  as  the  acidic  patch.  I  developed  an  analysis  pipeline  that  identified  more  than  40  hits,  including  the  E3  ubiquitin  ligase  SHPRH.  The  Farnung  laboratory  used  cryo-electron  microcopy  to  solve  the  structure  of  SHPRH  bound  to  the  nucleosome,  revealing  an  interaction  that  closely  matches  the  screen's  prediction.  The  repeated  success  of  large-scale  AF-M  screens  has  demonstrated  their  value  as  powerful  hypothesis  generators,  motivating  development  of  a  proteome-wide  structural  interactome.  However,  generating  structural  models  for  all  ~200  million  possible  human  protein  pairs  was  computationally  prohibitive.  To  address  this,  I  developed  KIRC,  a  classifier  that  rapidly  scores  and  prioritizes  likely  interactors  based  on  experimental  omics  data.  Leveraging  a  GPU  cluster  donated  by  NVIDIA  corporation,  I  used  AF-M  to  model  the  top  1.5  million  KIRC-nominated  pairs  and  evaluated  them  with  SPOC.  Preliminary  analysis  suggests  that  the  pipeline  yielded  more  than  34,000  high-confidence  interactions,  many  of  which  are  uncharacterized.  In  summary,  my  work  has  produced  a  suite  of  computational  tools  that  streamline  large-  scale  in  silico  PPI  screening  and  help  biomedical  researchers  effectively  harness  advanced  machine  learning  to  accelerate  discovery.  The  all-by-all  genome  maintenance  screen,  the  acidic  patch  screen,  and  several  additional  collaborative  projects  with  labs  at  Harvard  Medical  School  collectively  highlight  the  power  and  versatility  of  this  approach.
■590    ▼aSchool  code:  0084.
■650  4▼aBioinformatics
■650  4▼aBiochemistry
■650  4▼aBiology
■650  4▼aMolecular  biology
■653    ▼aAlphaFold
■653    ▼aPredictomes
■653    ▼aProtein-protein  interaction
■653    ▼aStructure  Prediction  and  Omics-based  Classifier
■690    ▼a0715
■690    ▼a0487
■690    ▼a0306
■690    ▼a0307
■71020▼aHarvard  University▼bBiological  and  Biomedical  Sciences.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0084
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358509▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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