2gwk | pdb_00002gwk

SpvB ADP-ribosylated actin: orthorhombic crystal form

spinqualitylabelsall models 2gwk, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2gwk is a 2 chain structure with sequence from Oryctolagus cuniculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ATP, CA NonStd Res: HIC Related: 2gwj Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [ACTS_RABIT] Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells. Publication Abstract from PubMed 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. A steric antagonism of actin polymerization by a salmonella virulence protein.,Margarit SM, Davidson W, Frego L, Stebbins CE Structure. 2006 Aug;14(8):1219-29. PMID:16905096 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Actin

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