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Regulation of Recombinant Synaptic Fusion Pores
Regulation of Recombinant Synaptic Fusion Pores
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152644
- ISBN
- 9798383564707
- DDC
- 574.191
- 저자명
- Wu, Lanxi.
- 서명/저자
- Regulation of Recombinant Synaptic Fusion Pores
- 발행사항
- [Sl] : The University of Wisconsin - Madison, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 174 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
- 주기사항
- Advisor: Chapman, Edwin.
- 학위논문주기
- Thesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
- 초록/해제
- 요약Synaptic vesicle exocytosis results neurotransmitter release and is mainly mediated by soluble N-ethylmaleimide sensitive factor attachment protein receptors as the core fusion proteins with additional proteins and lipid molecules playing key roles in the fusion pathway. Fusion pore is the first crucial and short-lived intermediate in this pathway. Studying the dynamics and structure of the fusion pore is fundamental and crucial to understanding the mechanisms of exocytosis and neurotransmission. Recently developed technique combined nanodisc technology and black-lipid-membrane electrophysiology (ND-BLM system). The small sized NDs restrict the dilation of the fusion pore, and the BLM system allows a fast-sampling rate for measuring fusion pore activities at a single pore level. This dissertation focuses on using the ND-BLM system to study molecular factors that regulate fusion pore properties. Chapter II of this dissertation focused on a lipid molecule, cholesterol, which has been reported to affect SNARE-mediated exocytosis and fusion pore dynamic. Using the ND-BLM system, cholesterol is shown to significantly stabilize the fusion pore at the open state. Further study shows that these effects are attributed to the known role of cholesterol that alters membrane bending rigidity via the manipulation of unsaturated acyl-chains of phospholipids. To conclude, Chapter II shows that cholesterol stabilizes the fusion pore at the open state via modulating membrane bending rigidity. Chapter III focuses on a fusion accessory protein, complexin (Cpx). The C-terminal amphipathic helix of mammalian Cpx II forms pores on the membrane as well as budding vesicles from the membrane. In the ND-BLM system, this C-terminal amphipathic helix is shown to influence both the structure and the dynamics of the fusion pore. With these observations, Chapter III concludes that the membrane remodeling activity of Cpx promotes the recombinant fusion pore to open and then stabilize at the open state. After some efforts in understanding the molecular mechanism the regulation of the fusion pores, Chapter IV, future direction, continues to study the fusion pore dilation. Large sized NDs are used to allow further dilation of the fusion pore. The study of pore dilation will provide information about the regulation between kiss-and-run exocytosis and full-collapse exocytosis.
- 일반주제명
- Biophysics
- 일반주제명
- Neurosciences
- 일반주제명
- Physiology
- 일반주제명
- Biochemistry
- 키워드
- Cholesterol
- 키워드
- Complexin
- 키워드
- Exocytosis
- 키워드
- Fusion pores
- 키워드
- Membrane fusion
- 기타저자
- The University of Wisconsin - Madison Biophysics
- 기본자료저록
- Dissertations Abstracts International. 86-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152644
■006m o d
■007cr#unu||||||||
■020 ▼a9798383564707
■035 ▼a(MiAaPQ)AAI31485737
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a574.191
■1001 ▼aWu, Lanxi.
■24510▼aRegulation of Recombinant Synaptic Fusion Pores
■260 ▼a[Sl]▼bThe University of Wisconsin - Madison▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a174 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-01, Section: B.
■500 ▼aAdvisor: Chapman, Edwin.
■5021 ▼aThesis (Ph.D.)--The University of Wisconsin - Madison, 2024.
■520 ▼aSynaptic vesicle exocytosis results neurotransmitter release and is mainly mediated by soluble N-ethylmaleimide sensitive factor attachment protein receptors as the core fusion proteins with additional proteins and lipid molecules playing key roles in the fusion pathway. Fusion pore is the first crucial and short-lived intermediate in this pathway. Studying the dynamics and structure of the fusion pore is fundamental and crucial to understanding the mechanisms of exocytosis and neurotransmission. Recently developed technique combined nanodisc technology and black-lipid-membrane electrophysiology (ND-BLM system). The small sized NDs restrict the dilation of the fusion pore, and the BLM system allows a fast-sampling rate for measuring fusion pore activities at a single pore level. This dissertation focuses on using the ND-BLM system to study molecular factors that regulate fusion pore properties. Chapter II of this dissertation focused on a lipid molecule, cholesterol, which has been reported to affect SNARE-mediated exocytosis and fusion pore dynamic. Using the ND-BLM system, cholesterol is shown to significantly stabilize the fusion pore at the open state. Further study shows that these effects are attributed to the known role of cholesterol that alters membrane bending rigidity via the manipulation of unsaturated acyl-chains of phospholipids. To conclude, Chapter II shows that cholesterol stabilizes the fusion pore at the open state via modulating membrane bending rigidity. Chapter III focuses on a fusion accessory protein, complexin (Cpx). The C-terminal amphipathic helix of mammalian Cpx II forms pores on the membrane as well as budding vesicles from the membrane. In the ND-BLM system, this C-terminal amphipathic helix is shown to influence both the structure and the dynamics of the fusion pore. With these observations, Chapter III concludes that the membrane remodeling activity of Cpx promotes the recombinant fusion pore to open and then stabilize at the open state. After some efforts in understanding the molecular mechanism the regulation of the fusion pores, Chapter IV, future direction, continues to study the fusion pore dilation. Large sized NDs are used to allow further dilation of the fusion pore. The study of pore dilation will provide information about the regulation between kiss-and-run exocytosis and full-collapse exocytosis.
■590 ▼aSchool code: 0262.
■650 4▼aBiophysics
■650 4▼aNeurosciences
■650 4▼aPhysiology
■650 4▼aBiochemistry
■653 ▼aCholesterol
■653 ▼aComplexin
■653 ▼aExocytosis
■653 ▼aFusion pores
■653 ▼aMembrane fusion
■690 ▼a0786
■690 ▼a0317
■690 ▼a0487
■690 ▼a0719
■71020▼aThe University of Wisconsin - Madison▼bBiophysics.
■7730 ▼tDissertations Abstracts International▼g86-01B.
■790 ▼a0262
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163254▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


