2X79

Inward facing conformation of Mhp1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.273 
  • R-Value Observed: 0.277 

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: https://doi.org/10.1126/science.1186303
  • Primary Citation of Related Structures:  
    2X79

  • 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 conformation of Mhp1 at 3 ...

    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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HYDANTOIN TRANSPORT PROTEIN501Microbacterium liquefaciensMutation(s): 0 
Gene Names: hyuP
Membrane Entity: Yes 
UniProt
Find proteins for D6R8X8 (Microbacterium liquefaciens)
Explore D6R8X8 
Go to UniProtKB:  D6R8X8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD6R8X8
Protein Feature View
Expand
  • Reference Sequence
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: 3.80 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.273 
  • R-Value Observed: 0.277 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 173.888α = 90
b = 173.888β = 90
c = 74.502γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing

Structure Validation

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Entry History 

Revision History  (Full details and data files)

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