4b6j

Crystal structure of phosphoserine phosphatase from T. onnurineus

spinqualitylabelsall models 4b6j, resolution 3.34Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4b6j is a 4 chain structure with sequence from Theon. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 4ap9 Activity: Phosphoserine phosphatase, with EC number 3.1.3.3 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Phosphoserine phosphatase (PSP) catalyzes the final and irreversible step of L-serine synthesis by hydrolyzing phosphoserine to produce L-serine and inorganic phosphate. Developing a therapeutic drug that interferes with serine production is of great interest to regulate the pathogenicity of some bacteria and control D-serine levels in neurological diseases. We determined the crystal structure of PSP from the hyperthermophilic archaeon Thermococcus onnurineus at 1.8 A resolution, revealing an NDSB ligand bound to a novel site that is located in a fissure between the catalytic domain and the CAP module. The structure shows a half-open conformation of the CAP 1 module with a unique protruding loop of residues 150-155 that possesses a helical conformation in other structures of homologous PSPs. Activity assays indicate that the enzyme exhibits marginal PSP activity at low temperature but a sharp increase in the k(cat) /K(M) value, approximately 22 fold, when the temperature is increased. Structural and biochemical analyses suggest that the protruding loop in the active site might be an essential component for the regulation of the activity of PSP from hyperthermophilic T. onnurineus. Identification of this novel binding site distantly located from the catalytic site may be exploited for the development of effective therapeutic allosteric inhibitors against PSP activity. Proteins 2012. (c) 2012 Wiley Periodicals, Inc. Identification of a novel ligand binding site in phosphoserine phosphatase from the hyperthermophilic archaeon Thermococcus onnurineus.,Jung TY, Kim YS, Oh BH, Woo E Proteins. 2012 Dec 14. doi: 10.1002/prot.24238. PMID:23239422 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phosphoserine phosphatase

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