2OAU

Mechanosensitive Channel of Small Conductance (MscS)

• PDB DOI: https://doi.org/10.2210/pdb2OAU/pdb
• Entry: 2OAU supersedes: 1MXM

• Classification: MEMBRANE PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2006-12-17 Released: 2007-01-09 
• Deposition Author(s): Rees, D.C., Bass, R.B., Steinbacher, S., Strop, P., Barclay, M.T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.70 Å
• R-Value Free: 0.321 
• R-Value Work: 0.293 

Starting Model: experimental

Literature

Structures of the Prokaryotic Mechanosensitive Channels MscL and MscS

Steinbacher, S., Bass, R., Strop, P., Rees, D.C.

(2007) Current Topics In Membranes 58

Biological Assembly 1  

Global Symmetry: Cyclic - C7  (Explore in 3D)
Global Stoichiometry: Homo 7-mer - A7 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 231.66 kDa 
• Atom Count: 13,573 
• Modelled Residue Count: 1,778 
• Deposited Residue Count: 2,142 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Small-conductance mechanosensitive channel	A, B, C, D, E, F, G	306	Escherichia coli	Mutation(s): 0  Gene Names: mscS Membrane Entity: Yes
UniProt
Find proteins for P0C0S1 (Escherichia coli (strain K12)) Explore P0C0S1  Go to UniProtKB:  P0C0S1

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.70 Å
• R-Value Free: 0.321 
• R-Value Work: 0.293 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 184.274	α = 90
b = 184.274	β = 90
c = 260.485	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
PDB_EXTRACT	data extraction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-01-09 
Deposition Author(s): Rees, D.C., Bass, R.B., Steinbacher, S., Strop, P., Barclay, M.T.
• This entry supersedes: 1MXM

Revision History  

• Version 1.0: 2007-01-09
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-30
  Changes: Data collection, Database references, Refinement description