2VV5

The open structure of MscS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.45 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.293 
  • R-Value Observed: 0.294 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The Structure of an Open Form of an E. Coli Mechanosensitive Channel at 3.45 A Resolution.

Wang, W.Black, S.S.Edwards, M.D.Miller, S.Morrison, E.L.Bartlett, W.Dong, C.Naismith, J.H.Booth, I.R.

(2008) Science 321: 1179

  • DOI: 10.1126/science.1159262
  • Primary Citation of Related Structures:  
    2VV5

  • PubMed Abstract: 
  • How ion channels are gated to regulate ion flux in and out of cells is the subject of intense interest. The Escherichia coli mechanosensitive channel, MscS, opens to allow rapid ion efflux, relieving the turgor pressure that would otherwise destroy the cell ...

    How ion channels are gated to regulate ion flux in and out of cells is the subject of intense interest. The Escherichia coli mechanosensitive channel, MscS, opens to allow rapid ion efflux, relieving the turgor pressure that would otherwise destroy the cell. We present a 3.45 angstrom-resolution structure for the MscS channel in an open conformation. This structure has a pore diameter of approximately 13 angstroms created by substantial rotational rearrangement of the three transmembrane helices. The structure suggests a molecular mechanism that underlies MscS gating and its decay of conductivity during prolonged activation. Support for this mechanism is provided by single-channel analysis of mutants with altered gating characteristics.


    Organizational Affiliation

    Centre for Biomolecular Sciences, The North Haugh, University of St. Andrews, KY16 9ST, Scotland, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SMALL-CONDUCTANCE MECHANOSENSITIVE CHANNEL
A, B, C, D, E, F, G
A, B, C, D, E, F, G
286Escherichia coliMutation(s): 1 
Membrane Entity: Yes 
UniProt
Find proteins for P0C0S1 (Escherichia coli (strain K12))
Explore P0C0S1 
Go to UniProtKB:  P0C0S1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0C0S1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.45 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.293 
  • R-Value Observed: 0.294 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 230.88α = 90
b = 126.62β = 90.42
c = 123.22γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-08-05
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance