Journal
BIOORGANIC & MEDICINAL CHEMISTRY
Volume 17, Issue 14, Pages 4910-4915Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2009.06.005
Keywords
O-Antigen, Galactosyltransferase; Type 1 chain; Lacto-N-tetraose
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A beta 1,3-galactosyltransferase (WbgO) was identified in Escherichia coli O55:H7. Its function was confirmed by radioactive activity assay and structure analysis of the disaccharide synthesized with the recombinant enzyme. WbgO requires a divalent metal ion, either Mn2+ or Mg2+, for its activity and is active between pH 6.0-8.0 with a pH optimum of 7.0. N-acetylglucosamine (GlcNAc) and oligosaccharides with GlcNAc at the non-reducing end were shown to be its preferred substrates and it can be used for the synthesis of type 1 glycan chains from these substrates. Together with a recombinant bacterial GlcNAc-transferase, benzyl beta-lacto-N-tetraoside was synthesized with the purified WbgO to demonstrate the synthetic utility of WbgO. (C) 2009 Elsevier Ltd. All rights reserved.
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