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Long Range Regulation of Transcription Scales with Genomic Distance in a Gene Specific Manner
Long Range Regulation of Transcription Scales with Genomic Distance in a Gene Specific Manner
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105615
- ISBN
- 9798265428509
- DDC
- 500
- 서명/저자
- Long Range Regulation of Transcription Scales with Genomic Distance in a Gene Specific Manner
- 발행사항
- [Sl] : Stanford University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 81 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- 주기사항
- Includes supplementary digital materials.
- 주기사항
- Advisor: Wysocka, Joanna.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2024.
- 초록/해제
- 요약The precise timing and level of transcription during development is largely mediated by non-coding regions of the genome known as enhancers. Enhancers are sequences of DNA that harbor multiple binding sites for general and tissue-specific transcription factors (TFs). Binding of these TFs is accompanied by the recruitment of cofactors that are able to communicate at long ranges with target promoters. However, despite their importance to biology and development, how enhancers communicate with their target promoters remains poorly understood.This works builds on the finding that direct recruitment of cofactors, such as p300, or strong synthetic activators, such as VPR, is sufficient to bypass the requirement for sequence specific TFs and achieve long range regulation of expression. We first used a CRISPRa tiling screen to ask whether any site to which activators are recruited can function as an enhancer, focusing on the Prdm8-Fgf5 locus. We quickly learned that this approach is highly limited by the ability of dCas9-VPR to effectively bind all target sites.We next validated that CARGO-VPR, an approach utilizing 6 proximal gRNAs to recruit dCas9-VPR, enables effective dCas9-VPR binding at arbitrary genomic sites. We then utilize CARGO-VPR across the Prdm8-Fgf5 locus in mESCs. We demonstrate that transcription levels are highly dependent on distance between activator recruitment site and the target promoter. Interestingly, we also observe that this relationship is highly gene-specific.We examined chromatin structure using optical reconstruction of chromatin architecture (ORCA) as well as published HiC and determined that 3D conformation of the locus is not explanatory of the observed gene-specific differences in expression decay profiles. We instead find that the gene-specific distance-expression decay profile is remarkably robust to multiple genetic and epigenetic perturbations.
- 일반주제명
- Nature
- 일반주제명
- CRISPR
- 일반주제명
- Gene expression
- 일반주제명
- Communication
- 일반주제명
- Genome editing
- 일반주제명
- Dissection
- 일반주제명
- Stem cells
- 일반주제명
- Transcription factors
- 일반주제명
- Bioinformatics
- 일반주제명
- Cellular biology
- 일반주제명
- Genetics
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■007cr#unu||||||||
■020 ▼a9798265428509
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■035 ▼a(MiAaPQ)Stanfordhs606rk9588
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a500
■1001 ▼aJensen, Christina Loreen.
■24510▼aLong Range Regulation of Transcription Scales with Genomic Distance in a Gene Specific Manner
■260 ▼a[Sl]▼bStanford University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a81 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aIncludes supplementary digital materials.
■500 ▼aAdvisor: Wysocka, Joanna.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2024.
■520 ▼aThe precise timing and level of transcription during development is largely mediated by non-coding regions of the genome known as enhancers. Enhancers are sequences of DNA that harbor multiple binding sites for general and tissue-specific transcription factors (TFs). Binding of these TFs is accompanied by the recruitment of cofactors that are able to communicate at long ranges with target promoters. However, despite their importance to biology and development, how enhancers communicate with their target promoters remains poorly understood.This works builds on the finding that direct recruitment of cofactors, such as p300, or strong synthetic activators, such as VPR, is sufficient to bypass the requirement for sequence specific TFs and achieve long range regulation of expression. We first used a CRISPRa tiling screen to ask whether any site to which activators are recruited can function as an enhancer, focusing on the Prdm8-Fgf5 locus. We quickly learned that this approach is highly limited by the ability of dCas9-VPR to effectively bind all target sites.We next validated that CARGO-VPR, an approach utilizing 6 proximal gRNAs to recruit dCas9-VPR, enables effective dCas9-VPR binding at arbitrary genomic sites. We then utilize CARGO-VPR across the Prdm8-Fgf5 locus in mESCs. We demonstrate that transcription levels are highly dependent on distance between activator recruitment site and the target promoter. Interestingly, we also observe that this relationship is highly gene-specific.We examined chromatin structure using optical reconstruction of chromatin architecture (ORCA) as well as published HiC and determined that 3D conformation of the locus is not explanatory of the observed gene-specific differences in expression decay profiles. We instead find that the gene-specific distance-expression decay profile is remarkably robust to multiple genetic and epigenetic perturbations.
■590 ▼aSchool code: 0212.
■650 4▼aNature
■650 4▼aCRISPR
■650 4▼aGene expression
■650 4▼aCommunication
■650 4▼aGenome editing
■650 4▼aDissection
■650 4▼aStem cells
■650 4▼aTranscription factors
■650 4▼aBioinformatics
■650 4▼aCellular biology
■650 4▼aGenetics
■690 ▼a0459
■690 ▼a0715
■690 ▼a0379
■690 ▼a0369
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360759▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


