2iy8 | pdb_00002iy8

CRYSTAL STRUCTURE OF THE SIALYLTRANSFERASE PM0188 WITH CMP-3FNEUAC AND LACTOSE

spinqualitylabelsall models 2iy8, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2iy8 is a 1 chain structure with sequence from Pasteurella multocida. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CSF, LAT NonStd Res: MSE Related: 2c83, 2c84, 2ex0, 2ex1, 2iy7 Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed PM0188 is a newly identified sialyltransferase from P. multocida which transfers sialic acid from cytidine 5'-monophosphonuraminic acid (CMP-NeuAc) to an acceptor sugar. Although sialyltransferases are involved in important biological functions like cell-cell recognition, cell differentiation and receptor-ligand interactions, little is known about their catalytic mechanism. Here, we report the X-ray crystal structures of PM0188 in the presence of an acceptor sugar and a donor sugar analogue, revealing the precise mechanism of sialic acid transfer. Site-directed mutagenesis, kinetic assays, and structural analysis show that Asp141, His311, Glu338, Ser355 and Ser356 are important catalytic residues; Asp141 is especially crucial as it acts as a general base. These complex structures provide insights into the mechanism of sialyltransferases and the structure-based design of specific inhibitors. Structural analysis of sialyltransferase PM0188 from Pasteurella multocida complexed with donor analogue and acceptor sugar.,Kim DU, Yoo JH, Lee YJ, Kim KS, Cho HS BMB Rep. 2008 Jan 31;41(1):48-54. PMID:18304450 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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