3RRK

Crystal structure of the cytoplasmic N-terminal domain of subunit I, homolog of subunit a, of V-ATPase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.64 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.193 

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This is version 1.1 of the entry. See complete history


Literature

Crystal structure of the cytoplasmic N-terminal domain of subunit I, a homolog of subunit a, of V-ATPase.

Srinivasan, S.Vyas, N.K.Baker, M.L.Quiocho, F.A.

(2011) J Mol Biol 412: 14-21

  • DOI: https://doi.org/10.1016/j.jmb.2011.07.014
  • Primary Citation of Related Structures:  
    3RRK

  • PubMed Abstract: 

    Subunit "a" is associated with the membrane-bound (V(O)) complex of eukaryotic vacuolar H(+)-ATPase acidification machinery. It has also been shown recently to be involved in diverse membrane fusion/secretory functions independent of acidification. Here, we report the crystal structure of the N-terminal cytosolic domain from the Meiothermus ruber subunit "I" homolog of subunit a. The structure is composed of a curved long central α-helix bundle capped on both ends by two lobes with similar α/β architecture. Based on the structure, a reasonable model of its eukaryotic subunit a counterpart was obtained. The crystal structure and model fit well into reconstructions from electron microscopy of prokaryotic and eukaryotic vacuolar H(+)-ATPases, respectively, clarifying their orientations and interactions and revealing features that could enable subunit a to play a role in membrane fusion/secretion.


  • Organizational Affiliation

    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
V-type ATPase 116 kDa subunit357Meiothermus ruber DSM 1279Mutation(s): 0 
Gene Names: Mrub_0956
UniProt
Find proteins for D3PQI8 (Meiothermus ruber (strain ATCC 35948 / DSM 1279 / VKM B-1258 / 21))
Explore D3PQI8 
Go to UniProtKB:  D3PQI8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD3PQI8
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.64 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.193 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.32α = 90
b = 102.181β = 90
c = 139.062γ = 90
Software Package:
Software NamePurpose
HKL-3000data collection
PHENIXmodel building
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-08-10
    Type: Initial release
  • Version 1.1: 2011-11-30
    Changes: Database references