3D31

ModBC from Methanosarcina acetivorans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.251 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis of trans-inhibition in a molybdate/tungstate ABC transporter.

Gerber, S.Comellas-Bigler, M.Goetz, B.A.Locher, K.P.

(2008) Science 321: 246-250

  • DOI: https://doi.org/10.1126/science.1156213
  • Primary Citation of Related Structures:  
    3D31

  • PubMed Abstract: 

    Transport across cellular membranes is an essential process that is catalyzed by diverse membrane transport proteins. The turnover rates of certain transporters are inhibited by their substrates in a process termed trans-inhibition, whose structural basis is poorly understood. We present the crystal structure of a molybdate/tungstate ABC transporter (ModBC) from Methanosarcina acetivorans in a trans-inhibited state. The regulatory domains of the nucleotide-binding subunits are in close contact and provide two oxyanion binding pockets at the shared interface. By specifically binding to these pockets, molybdate or tungstate prevent adenosine triphosphatase activity and lock the transporter in an inward-facing conformation, with the catalytic motifs of the nucleotide-binding domains separated. This allosteric effect prevents the transporter from switching between the inward-facing and the outward-facing states, thus interfering with the alternating access and release mechanism.


  • Organizational Affiliation

    Institute of Molecular Biology and Biophysics, ETH Zürich, HPK D14.3, 8093 Zürich, Switzerland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sulfate/molybdate ABC transporter, ATP-binding protein
A, B
348Methanosarcina acetivoransMutation(s): 0 
UniProt
Find proteins for Q8TTZ3 (Methanosarcina acetivorans (strain ATCC 35395 / DSM 2834 / JCM 12185 / C2A))
Explore Q8TTZ3 
Go to UniProtKB:  Q8TTZ3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8TTZ3
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Sulfate/molybdate ABC transporter, permease protein
C, D
295Methanosarcina acetivoransMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for Q8TTZ4 (Methanosarcina acetivorans (strain ATCC 35395 / DSM 2834 / JCM 12185 / C2A))
Explore Q8TTZ4 
Go to UniProtKB:  Q8TTZ4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8TTZ4
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.251 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.84α = 90
b = 139.46β = 90
c = 207.33γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
SHELXmodel building
CNSrefinement
XDSdata reduction
SHELXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-06-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-05-17
    Changes: Data collection
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references, Derived calculations