6m1x

Crystal structure of Phosphoserine Phosphatase in complex with 3-Phosphoglyceric Acid from Entamoeba histolytica

spinqualitylabelsall models 6m1x, resolution 2.48Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6m1x is a 4 chain structure with sequence from Entamoeba histolytica. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.48Å Ligands: 3PG, PO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function C4M5P9_ENTH1 Publication Abstract from PubMed Entamoeba histolytica phosphoserine phosphatase (EhPSP), a regulatory enzyme in the serine biosynthetic pathway, is also a structural homolog of cofactor-dependent phosphoglycerate mutase (dPGM). However, despite sharing many of its catalytic residues with dPGM, EhPSP displays no significant mutase activity. In the current work, we determined a crystal structure of EhPSP in complex with 3-PGA to 2.5 A resolution and observed striking differences between the orientation of 3-PGA bound to EhPSP and that to its other homologous structures. We also performed computational modeling and simulations of the intermediate 2,3-bisphosphoglyceric acid into the active site of EhPSP to better understand its mechanistic details. Based on these results and those of a similar study with the dPGMs from E. coli and B. pseudomallei, the affinity of EhPSP for 2,3-BPG was concluded to be lower than those of the other proteins. Moreover, a different set of 2,3-BPG interacting residues was observed in EhPSP compared to dPGMs, with all of the crucial interacting residues of dPGMs either missing or substituted with weakly interacting residues. This study has expanded our understanding, at the structural level, of the inability of EhPSP to catalyze the mutase reaction and has strengthened earlier conclusions indicating it to be a true phosphatase. Structural analysis of EhPSP in complex with 3-phosphoglyceric acid from Entamoeba histolytica reveals a basis for its lack of phosphoglycerate mutase activity.,Kumari P, Vijayan R, Gourinath S Int J Biol Macromol. 2021 May 1;178:1-10. doi: 10.1016/j.ijbiomac.2021.02.153., Epub 2021 Feb 23. PMID:33631257 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phosphoserine phosphatase

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