6IDR

Crystal structure of Vibrio cholerae MATE transporter VcmN in the bent form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.236 

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Literature

Structural Basis of H+-Dependent Conformational Change in a Bacterial MATE Transporter.

Kusakizako, T.Claxton, D.P.Tanaka, Y.Maturana, A.D.Kuroda, T.Ishitani, R.Mchaourab, H.S.Nureki, O.

(2019) Structure 27: 293

  • DOI: https://doi.org/10.1016/j.str.2018.10.004
  • Primary Citation of Related Structures:  
    6IDP, 6IDR, 6IDS

  • PubMed Abstract: 

    Multidrug and toxic compound extrusion (MATE) transporters efflux toxic compounds using a Na + or H + gradient across the membrane. Although the structures of MATE transporters have been reported, the cation-coupled substrate transport mechanism remains controversial. Here we report crystal structures of VcmN, a Vibrio cholerae MATE transporter driven by the H + gradient. High-resolution structures in two distinct conformations associated with different pHs revealed that the rearrangement of the hydrogen-bonding network around the conserved Asp35 induces the bending of transmembrane helix 1, as in the case of the H + -coupled Pyrococcus furiosus MATE transporter. We also determined the crystal structure of the D35N mutant, which captured a unique conformation of TM1 facilitated by an altered hydrogen-bonding network. Based on the present results, we propose a common step in the transport cycle shared among prokaryotic H + -coupled MATE transporters.


  • Organizational Affiliation

    Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. Electronic address: ishitani@bs.s.u-tokyo.ac.jp.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MATE family efflux transporter441Vibrio choleraeMutation(s): 0 
Gene Names: CGT79_05080
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.236 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.254α = 90
b = 93.742β = 90
c = 100.243γ = 90
Software Package:
Software NamePurpose
Aimlessdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
DIALSdata reduction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-01-16
    Type: Initial release
  • Version 1.1: 2019-02-20
    Changes: Data collection, Database references