2OAP

Crystal structure of the archaeal secretion ATPase GspE in complex with AMP-PNP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Hexameric structures of the archaeal secretion ATPase GspE and implications for a universal secretion mechanism.

Yamagata, A.Tainer, J.A.

(2007) EMBO J 26: 878-890

  • DOI: 10.1038/sj.emboj.7601544
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The secretion superfamily ATPases are conserved motors in key microbial membrane transport and filament assembly machineries, including bacterial type II and IV secretion, type IV pilus assembly, natural competence, and archaeal flagellae assembly. W ...

    The secretion superfamily ATPases are conserved motors in key microbial membrane transport and filament assembly machineries, including bacterial type II and IV secretion, type IV pilus assembly, natural competence, and archaeal flagellae assembly. We report here crystal structures and small angle X-ray scattering (SAXS) solution analyses of the Archaeoglobus fulgidus secretion superfamily ATPase, afGspE. AfGspE structures in complex with ATP analogue AMP-PNP and Mg(2+) reveal for the first time, alternating open and closed subunit conformations within a hexameric ring. The closed-form active site with bound Mg(2+) evidently reveals the catalytically active conformation. Furthermore, nucleotide binding results and SAXS analyses of ADP, ATPgammaS, ADP-Vi, and AMP-PNP-bound states in solution showed that asymmetric assembly involves ADP binding, but clamped closed conformations depend on both ATP gamma-phosphate and Mg(2+) plus the conserved motifs, arginine fingers, and subdomains of the secretion ATPase superfamily. Moreover, protruding N-terminal domain shifts caused by the closed conformation suggest a unified piston-like, push-pull mechanism for ATP hydrolysis-dependent conformational changes, suitable to drive diverse microbial secretion and assembly processes by a universal mechanism.


    Organizational Affiliation

    Department of Molecular Biology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Type II secretion system protein
1, 2
511Archaeoglobus fulgidus DSM 4304Mutation(s): 18 
Gene Names: AF_0659
Find proteins for O29598 (Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126))
Go to UniProtKB:  O29598
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP

Download CCD File 
1, 2
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
2
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
1,2
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.95 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.226 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 132.864α = 90
b = 132.864β = 90
c = 442.261γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing
SOLOMONphasing
CNSrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-02-13
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description