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 

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

  • 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 t ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SMALL-CONDUCTANCE MECHANOSENSITIVE CHANNEL
A, B, C, D, E, F, G
286Escherichia coli (strain K12)Mutation(s): 1 
Gene Names: mscS (yggB)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Mechanosensitive
Protein: 
MscS voltage-modulated mechanosensitive channel
Find proteins for P0C0S1 (Escherichia coli (strain K12))
Go to UniProtKB:  P0C0S1
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.45 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.293 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 230.880α = 90.00
b = 126.620β = 90.42
c = 123.220γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
XDSdata reduction
REFMACrefinement
MOSFLMdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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