ISDA

Deposition Date 2006-05-04

Release Date 2006-08-29

Last Version Date 2024-11-13

Entry Detail

PDB ID:

2GWL

Keywords:

TRANSFERASE

Title:

Crystal structure of the Salmonella SpvB ATR Domain in complex with NADH

Biological Source:

Source Organism:

Salmonella typhimurium (Taxon ID: 602)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.90 Å

R-Value Free:

0.23

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 32 2 1

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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

NAI

Primary Citation

A steric antagonism of actin polymerization by a salmonella virulence protein.

Margarit, S.M, Davidson, W, Frego, L, Stebbins, C.E.Show

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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Primary Citation of related structures