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The Biochemical and Structural Basis of Get3d'S Role in Photosynthesis
The Biochemical and Structural Basis of Get3d'S Role in Photosynthesis
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104754
- ISBN
- 9798290651996
- DDC
- 574
- 서명/저자
- The Biochemical and Structural Basis of Get3dS Role in Photosynthesis
- 발행사항
- [Sl] : California Institute of Technology, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 134 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
- 주기사항
- Advisor: Clemons, Bil.
- 학위논문주기
- Thesis (Ph.D.)--California Institute of Technology, 2025.
- 초록/해제
- 요약Tail-anchored (TA) membrane proteins, defined by a single C-terminal transmembrane domain, are inserted into the endoplasmic reticulum (ER) membrane via the guided entry of tail-anchored proteins pathway. The central targeting factor of this pathway is Get3, an ATPase that receives TA clients from upstream chaperones and mediates their delivery to the ER. Here, we identify and characterize a unique Get3 homolog, termed Get3d, distinguished by a C-terminal \uD835\uDEFC-crystallin domain (\uD835\uDEFCCD). We show that Get3d is conserved across plants and photosynthetic bacteria and demonstrate that it localizes to the chloroplast in plants. We present the X-ray crystal structure of Get3d, revealing unique features including the \uD835\uDEFCCD and a clientbinding chamber in the closed state. Biochemical analyses confirm that Get3d is an active ATPase capable of binding TA proteins in vitro.To investigate its physiological role, we identified the plant-like Get3d homolog in Synechocystissp. PCC 6803 and generated deletion and complementation strains. Loss of Get3d impairs cell growth and pigment production, and proteomic analyses reveal widespread dysregulation, including up-regulation of transcriptional regulators and down-regulation of redox-associated proteins-suggesting a role in redox homeostasis. Complementation studies show that ATPase activity is necessary for restoring the expression of key photosynthesis-related proteins, while the \uD835\uDEFCCD is critical for maintaining Get3d protein stability in vivo.Finally, co-immunoprecipitation coupled to mass spectrometry identifies putative Get3d interaction partners enriched in membraneassociated and photosynthetic proteins. Together, these findings establish Get3d as a biochemically distinct and functionally essential member of the Get3 family, with a potential role in redox regulation and photosynthetic homeostasis in diverse photosynthetic organisms.
- 일반주제명
- Membranes
- 일반주제명
- Mass spectrometry
- 일반주제명
- Signal transduction
- 일반주제명
- Plasma
- 일반주제명
- Endoplasmic reticulum
- 일반주제명
- Ribonucleic acid--RNA
- 일반주제명
- Fourier transforms
- 일반주제명
- Protons
- 일반주제명
- Photosynthesis
- 일반주제명
- Chloroplasts
- 일반주제명
- Scientific imaging
- 일반주제명
- Genomes
- 일반주제명
- Energy
- 일반주제명
- Cyanobacteria
- 일반주제명
- Lipids
- 일반주제명
- Polypeptides
- 기타저자
- California Institute of Technology Chemistry and Chemical Engineering
- 기본자료저록
- Dissertations Abstracts International. 87-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017358801
■00520260202104754
■006m o d
■007cr#unu||||||||
■020 ▼a9798290651996
■035 ▼a(MiAaPQ)AAI32151366
■035 ▼a(MiAaPQ)Caltech17329
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a574
■1001 ▼aBarlow, Alexandra N.
■24510▼aThe Biochemical and Structural Basis of Get3d'S Role in Photosynthesis
■260 ▼a[Sl]▼bCalifornia Institute of Technology▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a134 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-01, Section: B.
■500 ▼aAdvisor: Clemons, Bil.
■5021 ▼aThesis (Ph.D.)--California Institute of Technology, 2025.
■520 ▼aTail-anchored (TA) membrane proteins, defined by a single C-terminal transmembrane domain, are inserted into the endoplasmic reticulum (ER) membrane via the guided entry of tail-anchored proteins pathway. The central targeting factor of this pathway is Get3, an ATPase that receives TA clients from upstream chaperones and mediates their delivery to the ER. Here, we identify and characterize a unique Get3 homolog, termed Get3d, distinguished by a C-terminal \uD835\uDEFC-crystallin domain (\uD835\uDEFCCD). We show that Get3d is conserved across plants and photosynthetic bacteria and demonstrate that it localizes to the chloroplast in plants. We present the X-ray crystal structure of Get3d, revealing unique features including the \uD835\uDEFCCD and a clientbinding chamber in the closed state. Biochemical analyses confirm that Get3d is an active ATPase capable of binding TA proteins in vitro.To investigate its physiological role, we identified the plant-like Get3d homolog in Synechocystissp. PCC 6803 and generated deletion and complementation strains. Loss of Get3d impairs cell growth and pigment production, and proteomic analyses reveal widespread dysregulation, including up-regulation of transcriptional regulators and down-regulation of redox-associated proteins-suggesting a role in redox homeostasis. Complementation studies show that ATPase activity is necessary for restoring the expression of key photosynthesis-related proteins, while the \uD835\uDEFCCD is critical for maintaining Get3d protein stability in vivo.Finally, co-immunoprecipitation coupled to mass spectrometry identifies putative Get3d interaction partners enriched in membraneassociated and photosynthetic proteins. Together, these findings establish Get3d as a biochemically distinct and functionally essential member of the Get3 family, with a potential role in redox regulation and photosynthetic homeostasis in diverse photosynthetic organisms.
■590 ▼aSchool code: 0037.
■650 4▼aMembranes
■650 4▼aMass spectrometry
■650 4▼aSignal transduction
■650 4▼aPlasma
■650 4▼aEndoplasmic reticulum
■650 4▼aRibonucleic acid--RNA
■650 4▼aFourier transforms
■650 4▼aProtons
■650 4▼aPhotosynthesis
■650 4▼aChloroplasts
■650 4▼aScientific imaging
■650 4▼aGenomes
■650 4▼aEnergy
■650 4▼aCyanobacteria
■650 4▼aLipids
■650 4▼aPolypeptides
■690 ▼a0791
■71020▼aCalifornia Institute of Technology▼bChemistry and Chemical Engineering.
■7730 ▼tDissertations Abstracts International▼g87-01B.
■790 ▼a0037
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358801▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


