2X79

Inward facing conformation of Mhp1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.8 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.273 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular Basis of Alternating Access Membrane Transport by the Sodium-Hydantoin Transporter Mhp1.

Shimamura, T.Weyand, S.Beckstein, O.Rutherford, N.G.Hadden, J.M.Sharples, D.Sansom, M.S.P.Iwata, S.Henderson, P.J.F.Cameron, A.D.

(2010) Science 328: 470

  • DOI: 10.1126/science.1186303

  • PubMed Abstract: 
  • The structure of the sodium-benzylhydantoin transport protein Mhp1 from Microbacterium liquefaciens comprises a five-helix inverted repeat, which is widespread among secondary transporters. Here, we report the crystal structure of an inward-facing co ...

    The structure of the sodium-benzylhydantoin transport protein Mhp1 from Microbacterium liquefaciens comprises a five-helix inverted repeat, which is widespread among secondary transporters. Here, we report the crystal structure of an inward-facing conformation of Mhp1 at 3.8 angstroms resolution, complementing its previously described structures in outward-facing and occluded states. From analyses of the three structures and molecular dynamics simulations, we propose a mechanism for the transport cycle in Mhp1. Switching from the outward- to the inward-facing state, to effect the inward release of sodium and benzylhydantoin, is primarily achieved by a rigid body movement of transmembrane helices 3, 4, 8, and 9 relative to the rest of the protein. This forms the basis of an alternating access mechanism applicable to many transporters of this emerging superfamily.


    Organizational Affiliation

    Division of Molecular Biosciences, Membrane Protein Crystallography Group, Imperial College, London SW7 2AZ, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HYDANTOIN TRANSPORT PROTEIN
A
501Microbacterium liquefaciensN/A
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Nucleobase-Cation-Symport-1 (NCS1) Family
Protein: 
Mhp1 Benzyl-hydantoin transporter (without substrate); outward-facing conformation
Find proteins for D6R8X8 (Microbacterium liquefaciens)
Go to UniProtKB:  D6R8X8
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.8 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.273 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 173.888α = 90.00
b = 173.888β = 90.00
c = 74.502γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
DENZOdata reduction
SHARPphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-05-05
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance