- EMDB-22928: Structure of the yeast TRAPPIII-Ypt1(Rab1) complex -
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ID or keywords:
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Basic information
Entry
Database: EMDB / ID: EMD-22928
Title
Structure of the yeast TRAPPIII-Ypt1(Rab1) complex
Map data
Unsharpened reconstruction
Sample
Complex: TRAPPIII-Ypt1 complex
Protein or peptide: Trafficking protein particle complex subunit 23
Protein or peptide: Trafficking protein particle complex subunit 31
Protein or peptide: Trafficking protein particle complex subunit BET5
Protein or peptide: Trafficking protein particle complex subunit BET3
Protein or peptide: Trafficking protein particle complex subunit 33
Protein or peptide: Trafficking protein particle complex subunit 20
Protein or peptide: GTP-binding protein YPT1
Protein or peptide: Trafficking protein particle complex III-specific subunit 85
Ligand: PALMITIC ACID
Keywords
GTPase / GEF / ER / Golgi / Autophagy / PROTEIN TRANSPORT
Function / homology
Function and homology information
Cvt vesicle assembly / pre-mRNA catabolic process / Golgi Cisternae Pericentriolar Stack Reorganization / Golgi vesicle docking / regulation of endoplasmic reticulum unfolded protein response / Golgi vesicle budding / TRAPPI protein complex / RAB geranylgeranylation / SNARE complex disassembly / RAB GEFs exchange GTP for GDP on RABs ...Cvt vesicle assembly / pre-mRNA catabolic process / Golgi Cisternae Pericentriolar Stack Reorganization / Golgi vesicle docking / regulation of endoplasmic reticulum unfolded protein response / Golgi vesicle budding / TRAPPI protein complex / RAB geranylgeranylation / SNARE complex disassembly / RAB GEFs exchange GTP for GDP on RABs / TRAPPII protein complex / TRAPPIII protein complex / TRAPP complex / early endosome to Golgi transport / COPI-dependent Golgi-to-ER retrograde traffic / COPI-mediated anterograde transport / COPII-mediated vesicle transport / COPII-coated vesicle budding / cis-Golgi network membrane / cytoplasm to vacuole targeting by the Cvt pathway / protein localization to phagophore assembly site / intra-Golgi vesicle-mediated transport / phagophore assembly site membrane / pexophagy / Golgi stack / piecemeal microautophagy of the nucleus / cis-Golgi network / protein-containing complex localization / endocytic recycling / retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum / phagophore assembly site / retrograde transport, endosome to Golgi / reticulophagy / cellular response to nitrogen starvation / SNARE complex assembly / sporulation resulting in formation of a cellular spore / positive regulation of macroautophagy / autophagosome assembly / chromosome organization / endoplasmic reticulum to Golgi vesicle-mediated transport / Neutrophil degranulation / endomembrane system / SNARE binding / meiotic cell cycle / intracellular protein transport / macroautophagy / trans-Golgi network / protein-containing complex assembly / cytoplasmic vesicle / Golgi membrane / GTPase activity / endoplasmic reticulum membrane / GTP binding / Golgi apparatus / endoplasmic reticulum / mitochondrion / nucleus / cytosol / cytoplasm Similarity search - Function
TRAPP III complex, Trs85 / ER-Golgi trafficking TRAPP I complex 85 kDa subunit / Trafficking protein particle complex subunit 2 / Sedlin, N-terminal conserved region / Trafficking protein particle complex subunit / Sybindin-like family / Sybindin-like family / TRAPP I complex, subunit 5 / TRAPP complex, Trs33 subunit / Bet3 family ...TRAPP III complex, Trs85 / ER-Golgi trafficking TRAPP I complex 85 kDa subunit / Trafficking protein particle complex subunit 2 / Sedlin, N-terminal conserved region / Trafficking protein particle complex subunit / Sybindin-like family / Sybindin-like family / TRAPP I complex, subunit 5 / TRAPP complex, Trs33 subunit / Bet3 family / Transport protein particle (TRAPP) component / Transport protein particle (TRAPP) component / : / NO signalling/Golgi transport ligand-binding domain superfamily / Longin-like domain superfamily / small GTPase Rab1 family profile. / Ran (Ras-related nuclear proteins) /TC4 subfamily of small GTPases / Rho (Ras homology) subfamily of Ras-like small GTPases / Ras subfamily of RAS small GTPases / Small GTPase / Ras family / Rab subfamily of small GTPases / Small GTP-binding protein domain / P-loop containing nucleoside triphosphate hydrolase Similarity search - Domain/homology
GTP-binding protein YPT1 / Trafficking protein particle complex subunit BET3 / Trafficking protein particle complex subunit 20 / Trafficking protein particle complex III-specific subunit 85 / Trafficking protein particle complex subunit 31 / Trafficking protein particle complex subunit BET5 / Trafficking protein particle complex subunit 23 / Trafficking protein particle complex subunit 33 Similarity search - Component
Biological species
Saccharomyces cerevisiae (brewer's yeast)
Method
single particle reconstruction / cryo EM / Resolution: 3.7 Å
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM116942
United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM136258
United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM097272
United States
National Institutes of Health/National Institute on Minority Health and Health Disparities (NIH/NIMHD)
R01HD095296
United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM124559
United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM124559
United States
National Science Foundation (NSF, United States)
DBI-1661380
United States
National Science Foundation (NSF, United States)
DMR-1719875
United States
Medical Research Council (MRC, United Kingdom)
MRC_UP_1201/10
United Kingdom
National Science Foundation (NSF, United States)
DGE-1650441
United States
Citation
Journal: EMBO J / Year: 2021 Title: Structural basis of TRAPPIII-mediated Rab1 activation. Authors: Aaron Mn Joiner / Ben P Phillips / Kumar Yugandhar / Ethan J Sanford / Marcus B Smolka / Haiyuan Yu / Elizabeth A Miller / J Christopher Fromme / Abstract: The GTPase Rab1 is a master regulator of the early secretory pathway and is critical for autophagy. Rab1 activation is controlled by its guanine nucleotide exchange factor, the multisubunit TRAPPIII ...The GTPase Rab1 is a master regulator of the early secretory pathway and is critical for autophagy. Rab1 activation is controlled by its guanine nucleotide exchange factor, the multisubunit TRAPPIII complex. Here, we report the 3.7 Å cryo-EM structure of the Saccharomyces cerevisiae TRAPPIII complex bound to its substrate Rab1/Ypt1. The structure reveals the binding site for the Rab1/Ypt1 hypervariable domain, leading to a model for how the complex interacts with membranes during the activation reaction. We determined that stable membrane binding by the TRAPPIII complex is required for robust activation of Rab1/Ypt1 in vitro and in vivo, and is mediated by a conserved amphipathic α-helix within the regulatory Trs85 subunit. Our results show that the Trs85 subunit serves as a membrane anchor, via its amphipathic helix, for the entire TRAPPIII complex. These findings provide a structural understanding of Rab activation on organelle and vesicle membranes.
History
Deposition
Nov 3, 2020
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Header (metadata) release
Jun 2, 2021
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Map release
Jun 2, 2021
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Update
Oct 16, 2024
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Current status
Oct 16, 2024
Processing site: RCSB / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
Model: UltrAuFoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY / Support film - Film thickness: 50 / Pretreatment - Type: GLOW DISCHARGE
Vitrification
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV Details: Either 0.02% Tween-20 or 0.025% amphipol A8-35 was added before application of the sample to the grid..
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Electron microscopy #1
Microscopy ID
1
Microscope
FEI TALOS ARCTICA
Specialist optics
Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Image recording
Image recording ID: 1 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beam
Acceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron optics
Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
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Electron microscopy #1~
Microscopy ID
1
Microscope
FEI TITAN KRIOS
Image recording
Image recording ID: 2 / Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Average electron dose: 20.0 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron optics
Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
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Electron microscopy #1~~
Microscopy ID
1
Microscope
FEI TITAN KRIOS
Specialist optics
Energy filter - Name: GIF Quantum LS / Energy filter - Slit width: 20 eV
Image recording
Image recording ID: 3 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 50.0 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron optics
Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
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