2GWM image
Deposition Date 2006-05-04
Release Date 2006-08-29
Last Version Date 2024-02-14
Entry Detail
PDB ID:
2GWM
Keywords:
TRANSFERASE, TOXIN
Title:
Crystal structure of the Salmonella SpvB ATR Domain
Biological Source:
Source Organism:
Salmonella typhimurium (Taxon ID: 602)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.50 Å
R-Value Free:
0.20
R-Value Work:
0.15
R-Value Observed:
0.15
Space Group:
P 32 2 1
2GWM validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:65 kDa virulence protein
Chain IDs:A
Chain Length:200
Number of Molecules:1
Biological Source:Salmonella typhimurium
UniProt ID:P21454 Pfam ID:PF03496
Ligand Molecules
SO4
Primary Citation
A steric antagonism of actin polymerization by a salmonella virulence protein.
Structure 14 1219 1229 (2006)
PMID: 16905096 DOI: 10.1016/j.str.2006.05.022

Abstact

Salmonella spp. require the ADP-ribosyltransferase activity of the SpvB protein for intracellular growth and systemic virulence. SpvB covalently modifies actin, causing cytoskeletal disruption and apoptosis. We report here the crystal structure of the catalytic domain of SpvB, and we show by mass spectrometric analysis that SpvB modifies actin at Arg177, inhibiting its ATPase activity. We also describe two crystal structures of SpvB-modified, polymerization-deficient actin. These structures reveal that ADP-ribosylation does not lead to dramatic conformational changes in actin, suggesting a model in which this large family of toxins inhibits actin polymerization primarily through steric disruption of intrafilament contacts.

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Disease

Primary Citation of related structures
2GWL