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- PDB-8cr2: Homo sapiens Get1/Get2 heterotetramer (a3' deletion variant) in c... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8cr2 | |||||||||
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Title | Homo sapiens Get1/Get2 heterotetramer (a3' deletion variant) in complex with a Get3 dimer | |||||||||
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![]() | MEMBRANE PROTEIN / membrane protein insertion / GET pathway / tail anchored membrane protein | |||||||||
Function / homology | ![]() arsenite transmembrane transporter activity / membrane insertase activity / GET complex / tail-anchored membrane protein insertion into ER membrane / receptor recycling / Hydrolases; Acting on acid anhydrides / protein insertion into ER membrane / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / B cell homeostasis / protein-membrane adaptor activity ...arsenite transmembrane transporter activity / membrane insertase activity / GET complex / tail-anchored membrane protein insertion into ER membrane / receptor recycling / Hydrolases; Acting on acid anhydrides / protein insertion into ER membrane / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / B cell homeostasis / protein-membrane adaptor activity / vesicle-mediated transport / negative regulation of proteasomal ubiquitin-dependent protein catabolic process / negative regulation of protein ubiquitination / epidermal growth factor receptor signaling pathway / defense response / protein stabilization / ubiquitin protein ligase binding / endoplasmic reticulum membrane / nucleolus / signal transduction / endoplasmic reticulum / ATP hydrolysis activity / extracellular exosome / nucleoplasm / ATP binding / membrane / nucleus / metal ion binding / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.2 Å | |||||||||
![]() | McDowell, M.A. / Heimes, M. / Wild, K. / Sinning, I. | |||||||||
Funding support | ![]()
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![]() | ![]() Title: The GET insertase exhibits conformational plasticity and induces membrane thinning. Authors: Melanie A McDowell / Michael Heimes / Giray Enkavi / Ákos Farkas / Daniel Saar / Klemens Wild / Blanche Schwappach / Ilpo Vattulainen / Irmgard Sinning / ![]() ![]() Abstract: The eukaryotic guided entry of tail-anchored proteins (GET) pathway mediates the biogenesis of tail-anchored (TA) membrane proteins at the endoplasmic reticulum. In the cytosol, the Get3 chaperone ...The eukaryotic guided entry of tail-anchored proteins (GET) pathway mediates the biogenesis of tail-anchored (TA) membrane proteins at the endoplasmic reticulum. In the cytosol, the Get3 chaperone captures the TA protein substrate and delivers it to the Get1/Get2 membrane protein complex (GET insertase), which then inserts the substrate via a membrane-embedded hydrophilic groove. Here, we present structures, atomistic simulations and functional data of human and Chaetomium thermophilum Get1/Get2/Get3. The core fold of the GET insertase is conserved throughout eukaryotes, whilst thinning of the lipid bilayer occurs in the vicinity of the hydrophilic groove to presumably lower the energetic barrier of membrane insertion. We show that the gating interaction between Get2 helix α3' and Get3 drives conformational changes in both Get3 and the Get1/Get2 membrane heterotetramer. Thus, we provide a framework to understand the conformational plasticity of the GET insertase and how it remodels its membrane environment to promote substrate insertion. | |||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 173.3 KB | Display | ![]() |
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PDB format | ![]() | 130.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 16802MC ![]() 8cqzC ![]() 8cr1C ![]() 8oduC ![]() 8odvC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 40146.070 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Details: Get3 was expressed in E. coli / Source: (gene. exp.) ![]() ![]() ![]() References: UniProt: O43681, Hydrolases; Acting on acid anhydrides #2: Protein | Mass: 34429.418 Da / Num. of mol.: 2 Mutation: Truncation of 185 N-terminal residues. Residues 242-250 replaced with a GGGG linker Source method: isolated from a genetically manipulated source Details: Get2-Get1 was expressed as a fusion protein in S. frugiperda Source: (gene. exp.) ![]() ![]() ![]() #3: Chemical | ChemComp-ZN / | Has ligand of interest | N | |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
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Buffer solution | pH: 7.5 | ||||||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 1.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: Complex stabilised in PMAL-C8 amphipol | ||||||||||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/1 | ||||||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 279 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2400 nm / Nominal defocus min: 1200 nm / Cs: 2.7 mm |
Specimen holder | Cryogen: NITROGEN |
Image recording | Average exposure time: 2.58 sec. / Electron dose: 53.2 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 12311 |
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Processing
Software | Name: PHENIX / Version: 1.19_4092: / Classification: refinement | ||||||||||||||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 2044854 | ||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 4.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 224354 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: RIGID BODY FIT / Space: REAL | ||||||||||||||||||||||||||||||||||||
Atomic model building | PDB-ID: 6SO5 Accession code: 6SO5 / Source name: PDB / Type: experimental model | ||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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