1ro7

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{{STRUCTURE_1ro7| PDB=1ro7 | SCENE= }}
{{STRUCTURE_1ro7| PDB=1ro7 | SCENE= }}
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'''Structural analysis of the sialyltransferase CstII from Campylobacter jejuni in complex with a substrate analogue, CMP-3FNeuAc.'''
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===Structural analysis of the sialyltransferase CstII from Campylobacter jejuni in complex with a substrate analogue, CMP-3FNeuAc.===
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==Overview==
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Sialic acid terminates oligosaccharide chains on mammalian and microbial cell surfaces, playing critical roles in recognition and adherence. The enzymes that transfer the sialic acid moiety from cytidine-5'-monophospho-N-acetyl-neuraminic acid (CMP-NeuAc) to the terminal positions of these key glycoconjugates are known as sialyltransferases. Despite their important biological roles, little is understood about the mechanism or molecular structure of these membrane-associated enzymes. We report the first structure of a sialyltransferase, that of CstII from Campylobacter jejuni, a highly prevalent foodborne pathogen. Our structural, mutagenesis and kinetic data provide support for a novel mode of substrate binding and glycosyl transfer mechanism, including essential roles of a histidine (general base) and two tyrosine residues (coordination of the phosphate leaving group). This work provides a framework for understanding the activity of several sialyltransferases, from bacterial to human, and for the structure-based design of specific inhibitors.
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(as it appears on PubMed at http://www.pubmed.gov), where 14730352 is the PubMed ID number.
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{{ABSTRACT_PUBMED_14730352}}
==About this Structure==
==About this Structure==
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[[Category: Mixed alpha/beta]]
[[Category: Mixed alpha/beta]]
[[Category: Rossmann fold]]
[[Category: Rossmann fold]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 07:43:20 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 03:26:02 2008''

Revision as of 00:26, 29 July 2008

Image:1ro7.png

Template:STRUCTURE 1ro7

Structural analysis of the sialyltransferase CstII from Campylobacter jejuni in complex with a substrate analogue, CMP-3FNeuAc.

Template:ABSTRACT PUBMED 14730352

About this Structure

1RO7 is a Single protein structure of sequence from Campylobacter jejuni. Full crystallographic information is available from OCA.

Reference

Structural analysis of the sialyltransferase CstII from Campylobacter jejuni in complex with a substrate analog., Chiu CP, Watts AG, Lairson LL, Gilbert M, Lim D, Wakarchuk WW, Withers SG, Strynadka NC, Nat Struct Mol Biol. 2004 Feb;11(2):163-70. Epub 2004 Jan 18. PMID:14730352

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