2C83

CRYSTAL STRUCTURE OF THE SIALYLTRANSFERASE PM0188

Summary for 2C83

• Entry DOI: 10.2210/pdb2c83/pdb
• Related: 2C84
• Descriptor: HYPOTHETICAL PROTEIN PM0188 (2 entities in total)
• Functional Keywords: hypothetical protein, pm0188, sialyltransferase, transferase
• Biological source: PASTEURELLA MULTOCIDA
• Total number of polymer chains: 1
• Total formula weight: 45689.58

Authors

Kim, D.U.,Cho, H.S. (deposition date: 2005-12-01, release date: 2007-03-27, Last modification date: 2019-10-09)

Primary citation

Kim, D.U.,Yoo, J.H.,Lee, Y.J.,Kim, K.S.,Cho, H.S.
Structural analysis of sialyltransferase PM0188 from Pasteurella multocida complexed with donor analogue and acceptor sugar.
Bmb Rep, 41:48-54, 2008

PubMed Abstract: 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.

PubMed: 18304450
DOI: 10.5483/bmbrep.2008.41.1.048

Experimental method

X-RAY DIFFRACTION (1.9 Å)