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Structural and Dynamic Proximal Proteomic Analysis of TRPV2 Ion Channel Activation
Structural and Dynamic Proximal Proteomic Analysis of TRPV2 Ion Channel Activation
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151140
- ISBN
- 9798382830926
- DDC
- 574
- 저자명
- Gallo, Pamela N.
- 서명/저자
- Structural and Dynamic Proximal Proteomic Analysis of TRPV2 Ion Channel Activation
- 발행사항
- [Sl] : University of Pennsylvania, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 151 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Moiseenkova-Bell, Vera Y.;Lakadamyali, Melike.
- 학위논문주기
- Thesis (Ph.D.)--University of Pennsylvania, 2024.
- 초록/해제
- 요약Calcium signaling is a robust, tightly regulated pathway which mediates every vital cellular function through the propagation of localized calcium flux. Transient receptor potential vanilloid type 2 (TRPV2) ion channels are calcium-permeable, tetrameric ion channels with implications in several cellular processes such as immune response, neuronal development, and multiple cancers. Despite the impact of TRPV2 on varying physiologies, there is still much to be resolved about the ion channel. One key aspect of understanding the channel's function is to establish a structural basis for TRPV2 pharmacological channel opening. To investigate the functional mechanism for TRPV2 channel opening, cryogenic-electron microscopy (cryoEM) was used to determine the structures of TRPV2 upon pharmacological activation. Using this cutting-edge structural technique, we were able to elucidate high resolution structures of TRPV2 bound to the pharmacological activators 2-APB and CBD, where we found key residues for drug binding around the flexible S4-S5 linker region. A conserved mechanism for channel opening was also established. In addition to channel opening mechanisms, another vital aspect in channel function is to identify TRPV2's protein effectors and impacted signaling pathways. To achieve this, we sought to identify TRPV2's dynamic proximal interactome by employing the catalytically active peroxidase, APEX, to tag proteins proximal to TRPV2. By comparing the protein networks found in the unstimulated state to the pharmacologically activated states of TRPV2, we identified several protein effectors, including the calcium signaling molecules calmodulin and protein kinase C-. Novel functional links between TRPV2 calcium flux and the cell adhesion molecules neural cell adhesion molecule (NCAM) and L1 cell adhesion molecule were established in a neuronal context. Combined, we determined a structural basis for TRPV2 channel opening and established known calcium signaling and novel effector cell adhesion molecules from TRPV2's dynamic proximity proteome. These studies lay the groundwork for rational drug design and for future cellular studies connecting TRPV2 to cell adhesion.
- 일반주제명
- Biochemistry
- 일반주제명
- Cellular biology
- 일반주제명
- Neurosciences
- 일반주제명
- Oncology
- 일반주제명
- Developmental biology
- 키워드
- Proteomics
- 기타저자
- University of Pennsylvania Biochemistry and Molecular Biophysics
- 기본자료저록
- Dissertations Abstracts International. 85-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151140
■006m o d
■007cr#unu||||||||
■020 ▼a9798382830926
■035 ▼a(MiAaPQ)AAI31149320
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a574
■1001 ▼aGallo, Pamela N.
■24510▼aStructural and Dynamic Proximal Proteomic Analysis of TRPV2 Ion Channel Activation
■260 ▼a[Sl]▼bUniversity of Pennsylvania▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a151 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Moiseenkova-Bell, Vera Y.;Lakadamyali, Melike.
■5021 ▼aThesis (Ph.D.)--University of Pennsylvania, 2024.
■520 ▼aCalcium signaling is a robust, tightly regulated pathway which mediates every vital cellular function through the propagation of localized calcium flux. Transient receptor potential vanilloid type 2 (TRPV2) ion channels are calcium-permeable, tetrameric ion channels with implications in several cellular processes such as immune response, neuronal development, and multiple cancers. Despite the impact of TRPV2 on varying physiologies, there is still much to be resolved about the ion channel. One key aspect of understanding the channel's function is to establish a structural basis for TRPV2 pharmacological channel opening. To investigate the functional mechanism for TRPV2 channel opening, cryogenic-electron microscopy (cryoEM) was used to determine the structures of TRPV2 upon pharmacological activation. Using this cutting-edge structural technique, we were able to elucidate high resolution structures of TRPV2 bound to the pharmacological activators 2-APB and CBD, where we found key residues for drug binding around the flexible S4-S5 linker region. A conserved mechanism for channel opening was also established. In addition to channel opening mechanisms, another vital aspect in channel function is to identify TRPV2's protein effectors and impacted signaling pathways. To achieve this, we sought to identify TRPV2's dynamic proximal interactome by employing the catalytically active peroxidase, APEX, to tag proteins proximal to TRPV2. By comparing the protein networks found in the unstimulated state to the pharmacologically activated states of TRPV2, we identified several protein effectors, including the calcium signaling molecules calmodulin and protein kinase C-. Novel functional links between TRPV2 calcium flux and the cell adhesion molecules neural cell adhesion molecule (NCAM) and L1 cell adhesion molecule were established in a neuronal context. Combined, we determined a structural basis for TRPV2 channel opening and established known calcium signaling and novel effector cell adhesion molecules from TRPV2's dynamic proximity proteome. These studies lay the groundwork for rational drug design and for future cellular studies connecting TRPV2 to cell adhesion.
■590 ▼aSchool code: 0175.
■650 4▼aBiochemistry
■650 4▼aCellular biology
■650 4▼aNeurosciences
■650 4▼aOncology
■650 4▼aDevelopmental biology
■653 ▼aCalcium signaling
■653 ▼aNeurite outgrowth
■653 ▼aProteomics
■653 ▼aNeuronal development
■653 ▼aCell adhesion molecules
■690 ▼a0487
■690 ▼a0379
■690 ▼a0992
■690 ▼a0317
■690 ▼a0758
■71020▼aUniversity of Pennsylvania▼bBiochemistry and Molecular Biophysics.
■7730 ▼tDissertations Abstracts International▼g85-12B.
■790 ▼a0175
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160950▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


