5z3m | pdb_00005z3m

Crystal structure of Low Molecular Weight Phosphotyrosine phosphatase (VcLMWPTP-2) from Vibrio choleraeO395

spinqualitylabelsall models 5z3m, resolution 2.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5z3m is a 2 chain structure with sequence from Vibrio cholerae O395. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.6Å Ligands: GOL, MPO, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A0H3AM12_VIBC3 Publication Abstract from PubMed Low molecular weight protein tyrosine phosphatases (LMWPTPs) are ubiquitously found as small cytoplasmic enzymes which act on phospho-tyrosine containing proteins that are engaged in various cellular functions. Vibrio cholerae O395 contains two LMWPTPs having widely different sequence. Phylogenetic analysis based on a non redundant set of 124 LMWPTP sequences, designate that LMWPTP-2 from Vibrio choleraeO395 (VcLMWPTP-2) is a single taxon. We have determined the crystal structure of VcLMWPTP-2 at 2.6A with MOPS bound in the active site. Tertiary structure analysis indicates that VcLMWPTP-2 forms dimer. Studies in solution state also confirm exclusive presence of a dimeric form. Kinetic studies demonstrate that VcLMWPTP-2 dimer is catalytically active while inactivation through oligomerisation was reported as one of the regulatory mechanism in case of mammalian LMWPTP viz., Bos taurus LMWPTP, BPTP. Kinetic studies using p-nitrophenyl phosphate (p-NPP) as a substrate demonstrate active participation of both the P-loop cysteine in catalysis. Vicinal Cys17, in addition plays a role of protecting the catalytic Cys12 under oxidative stress. Structural analysis and MD simulations allowed us to propose the role of several conserved residues around the active site. Distribution of surface charges and grooves around the active site delineates unique features of VcLMWPTP-2 which could be utilized to design specific inhibitor. Vibrio cholerae LMWPTP-2 display unique surface charge and grooves around the active site: Indicative of distinctive substrate specificity and scope to design specific inhibitor.,Chatterjee S, Nath S, Ghosh B, Sen U Biochim Biophys Acta Proteins Proteom. 2019 Feb;1867(2):114-124. doi:, 10.1016/j.bbapap.2018.11.003. Epub 2018 Nov 14. PMID:30447286 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Tyrosine phosphatase 3D structures

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