4bpc

Structure of the Catalytic Domain of Protein Tyrosine Phosphatase Sigma in the Sulfenic Acid Form

spinqualitylabelsall models 4bpc, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4bpc is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.1Å Ligands: CSO Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PTPRS_HUMAN Interacts with LAR-interacting protein LIP.1. Publication Abstract from PubMed Protein tyrosine phosphatase sigma (PTPsigma) plays a vital role in neural development. The extracellular domain of PTPsigma binds to various proteoglycans, which control the activity of 2 intracellular PTP domains (D1 and D2). To understand the regulatory mechanism of PTPsigma, we carried out structural and biochemical analyses of PTPsigma D1D2. In the crystal structure analysis of a mutant form of D1D2 of PTPsigma, we unexpectedly found that the catalytic cysteine of D1 is oxidized to cysteine sulfenic acid, while that of D2 remained in its reduced form, suggesting that D1 is more sensitive to oxidation than D2. This finding contrasts previous observations on PTPalpha. The cysteine sulfenic acid of D1 was further confirmed by immunoblot and mass spectrometric analyses. The stabilization of the cysteine sulfenic acid in the active site of PTP suggests that the formation of cysteine sulfenic acid may function as a stable intermediate during the redox-regulation of PTPs. Structure of the catalytic domain of protein tyrosine phosphatase sigma in the sulfenic acid form.,Jeon TJ, Chien PN, Chun HJ, Ryu SE Mol Cells. 2013 May 30. PMID:23820885 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Tyrosine phosphatase 3D structures

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