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Regulation of Alternative Pre-mRNA Splicing by a Heteromeric Complex of RNA Binding Proteins
Regulation of Alternative Pre-mRNA Splicing by a Heteromeric Complex of RNA Binding Proteins
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152033
- ISBN
- 9798383186794
- DDC
- 574
- 저자명
- Peyda, Parham.
- 서명/저자
- Regulation of Alternative Pre-mRNA Splicing by a Heteromeric Complex of RNA Binding Proteins
- 발행사항
- [Sl] : University of California, Los Angeles, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 137 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
- 주기사항
- Advisor: Black, Douglas L.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Los Angeles, 2024.
- 초록/해제
- 요약The Rbfox proteins regulate essential splicing programs in various tissues. These proteins have a conserved RNA binding domain that binds to the GCAUG element and a C-terminal domain that binds to a large assembly of splicing regulators (LASR), a heteromeric complex of RNA-binding proteins. The LASR subunits have varying affinities for distinct RNA motifs, yet it is unclear how the Rbfox/LASR complex contacts RNA and regulates specific exons. In chapter 2, we map the transcriptome-wide binding sites of Rbfox1/LASR via a nuclease-protection assay. These sites contain combinations of motifs for Rbfox and LASR subunits hnRNP M, hnRNP H/F, hnRNP C, and Matrin3. These regions of RNA are adjacent to many cassette exons and individual motifs within them contribute additively to exon activation. LASR influences the target recognition of Rbfox by enabling it to activate exons through binding not only to GCAUG elements but also to lower-affinity secondary motifs adjacent to LASR binding sites. LASR bound to an RNA binding mutant Rbfox1 regulates additional exons. These results demonstrate that the Rbfox/LASR complex regulates splicing through multi-subunit recognition of cis-regulatory RNA modules, illustrating how splicing signals are decoded by combinatorial interactions between RNA-binding proteins.In addition to contacting RNA, the Rbfox/LASR complex self-assembles into higher-order structures. This process is mediated by homo-oligomerization of a low complexity, tyrosine-rich region, called C2, in Rbfox's C-terminal domain. Self-assembly of Rbfox is essential for splicing activation of a subset of its targets. However, it remains unclear what parts or motifs within C2, aside from the tyrosine residues, promote oligomerization. In chapter 3, we develop two in vitro assays to investigate how the C2 region of Rbfox2 oligomerizes. We find that different parts of C2 can promote or inhibit oligomerization. Furthermore, clusters of differently spaced tyrosines in C2 have distinct effects on its self-assembly. These assays and findings can be useful for future explorations of Rbfox oligomerization.
- 일반주제명
- Molecular biology
- 일반주제명
- Biochemistry
- 키워드
- Oligomerization
- 키워드
- Tyrosine
- 기타저자
- University of California, Los Angeles Molecular Biology 0573
- 기본자료저록
- Dissertations Abstracts International. 86-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152033
■006m o d
■007cr#unu||||||||
■020 ▼a9798383186794
■035 ▼a(MiAaPQ)AAI31334697
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a574
■1001 ▼aPeyda, Parham.
■24510▼aRegulation of Alternative Pre-mRNA Splicing by a Heteromeric Complex of RNA Binding Proteins
■260 ▼a[Sl]▼bUniversity of California, Los Angeles▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a137 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-01, Section: B.
■500 ▼aAdvisor: Black, Douglas L.
■5021 ▼aThesis (Ph.D.)--University of California, Los Angeles, 2024.
■520 ▼aThe Rbfox proteins regulate essential splicing programs in various tissues. These proteins have a conserved RNA binding domain that binds to the GCAUG element and a C-terminal domain that binds to a large assembly of splicing regulators (LASR), a heteromeric complex of RNA-binding proteins. The LASR subunits have varying affinities for distinct RNA motifs, yet it is unclear how the Rbfox/LASR complex contacts RNA and regulates specific exons. In chapter 2, we map the transcriptome-wide binding sites of Rbfox1/LASR via a nuclease-protection assay. These sites contain combinations of motifs for Rbfox and LASR subunits hnRNP M, hnRNP H/F, hnRNP C, and Matrin3. These regions of RNA are adjacent to many cassette exons and individual motifs within them contribute additively to exon activation. LASR influences the target recognition of Rbfox by enabling it to activate exons through binding not only to GCAUG elements but also to lower-affinity secondary motifs adjacent to LASR binding sites. LASR bound to an RNA binding mutant Rbfox1 regulates additional exons. These results demonstrate that the Rbfox/LASR complex regulates splicing through multi-subunit recognition of cis-regulatory RNA modules, illustrating how splicing signals are decoded by combinatorial interactions between RNA-binding proteins.In addition to contacting RNA, the Rbfox/LASR complex self-assembles into higher-order structures. This process is mediated by homo-oligomerization of a low complexity, tyrosine-rich region, called C2, in Rbfox's C-terminal domain. Self-assembly of Rbfox is essential for splicing activation of a subset of its targets. However, it remains unclear what parts or motifs within C2, aside from the tyrosine residues, promote oligomerization. In chapter 3, we develop two in vitro assays to investigate how the C2 region of Rbfox2 oligomerizes. We find that different parts of C2 can promote or inhibit oligomerization. Furthermore, clusters of differently spaced tyrosines in C2 have distinct effects on its self-assembly. These assays and findings can be useful for future explorations of Rbfox oligomerization.
■590 ▼aSchool code: 0031.
■650 4▼aMolecular biology
■650 4▼aBiochemistry
■653 ▼aAlternative splicing
■653 ▼aHomo-oligomerization
■653 ▼aOligomerization
■653 ▼aTyrosine
■690 ▼a0307
■690 ▼a0487
■71020▼aUniversity of California, Los Angeles▼bMolecular Biology 0573.
■7730 ▼tDissertations Abstracts International▼g86-01B.
■790 ▼a0031
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162615▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


