8GRO | pdb_00008gro

AtOSCA3.1 contracted state

• PDB DOI: https://doi.org/10.2210/pdb8GRO/pdb
• EM Map EMD-34210: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Arabidopsis thaliana
• Expression System: Homo sapiens
• Mutation(s): No 
• Membrane Protein: Yes  PDBTMMemProtMDmpstruc


• Deposited: 2022-09-02 Released: 2023-06-14 
• Deposition Author(s): Zhang, M.F.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.50 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

A mechanical-coupling mechanism in OSCA/TMEM63 channel mechanosensitivity.

Zhang, M., Shan, Y., Cox, C.D., Pei, D.

(2023) Nat Commun 14: 3943-3943

• PubMed: 37402734 
• DOI: https://doi.org/10.1038/s41467-023-39688-8
• Primary Citation Related Structures: 
  8GRN, 8GRO, 8GRS, 8GSO


• PubMed Abstract: 
  

  Mechanosensitive (MS) ion channels are a ubiquitous type of molecular force sensor sensing forces from the surrounding bilayer. The profound structural diversity in these channels suggests that the molecular mechanisms of force sensing follow unique structural blueprints. Here we determine the structures of plant and mammalian OSCA/TMEM63 proteins, allowing us to identify essential elements for mechanotransduction and propose roles for putative bound lipids in OSCA/TMEM63 mechanosensation. Briefly, the central cavity created by the dimer interface couples each subunit and modulates dimeric OSCA/TMEM63 channel mechanosensitivity through the modulating lipids while the cytosolic side of the pore is gated by a plug lipid that prevents the ion permeation. Our results suggest that the gating mechanism of OSCA/TMEM63 channels may combine structural aspects of the 'lipid-gated' mechanism of MscS and TRAAK channels and the calcium-induced gating mechanism of the TMEM16 family, which may provide insights into the structural rearrangements of TMEM16/TMC superfamilies.

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Organizational Affiliation: 
• Fudan University, Shanghai, 200433, China. [e-mail].
Laboratory of Cell Fate Control, School of Life Sciences, Westlake University, Hangzhou, 310000, China. [e-mail].
Fudan University, Shanghai, 200433, China.
Laboratory of Cell Fate Control, School of Life Sciences, Westlake University, Hangzhou, 310000, China.
Victor Chang Cardiac Research Institute, Sydney, 2010, Australia. [e-mail].
School of Biomedical Sciences, Faculty of Medicine & Health, UNSW Sydney, Kensington, New South Wales, 2052, Australia. [e-mail].
Laboratory of Cell Fate Control, School of Life Sciences, Westlake University, Hangzhou, 310000, China. [e-mail].

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 164.04 kDa 
• Atom Count: 10,624 
• Modeled Residue Count: 1,322 
• Deposited Residue Count: 1,448 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CSC1-like protein ERD4	A, B	724	Arabidopsis thaliana	Mutation(s): 0  Gene Names: ERD4, At1g30360, T4K22.4 Membrane Entity: Yes
UniProt
Find proteins for Q9C8G5 (Arabidopsis thaliana) Explore Q9C8G5  Go to UniProtKB:  Q9C8G5

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.50 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2023-06-14 
Deposition Author(s): Zhang, M.F.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2023-06-14
  Type: Initial release
  
• Version 1.1: 2023-07-26
  Changes: Database references
• Version 1.2: 2024-07-03
  Changes: Data collection