Sialyltransferases with enhanced legionaminic acid transferase activity for the preparation of analogs of sialoglycoconjugates

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DOIResolve DOI: https://doi.org/10.1093/glycob/cwv017
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Name affiliation
  1. National Research Council of Canada. Human Health Therapeutics
FormatText, Article
Journal titleGlycobiology
ISSN0959-6658
1460-2423
Volume25
Issue7
Pages767–773
SubjectNeisseria gonorrhoeae; Neisseria meningitidis; Pasteurella multocida; Photobacterium; legionaminic acid; sialyltransferase
Abstract
Legionaminic acids (Leg) are bacterial analogs of neuraminic acid, with the same stereochemistry but different substituents at C5, C7 and C9. Hence they may be incorporated into useful analogs of sialoglycoconjugates, and we previously reported two sialyltransferases that could utilize cytidine monophosphate (CMP)-Leg5Ac7Ac for preparation of Leg glycoconjugates, which were resistant to sialidases [Watson DC, Leclerc S, Wakarchuk WW, Young NM. 2011. Enzymatic synthesis and properties of glycoconjugates with legionaminic acid as a replacement for neuraminic acid. Glycobiology. 21:99–108.]. These were the porcine ST3Gal1 and Pasteurella multocida sialyltransferases. We now report two additional sialyltransferases with superior Leg-transferase properties to the previous two. These are (i) a truncated form of a Photobacterium α2,6-sialyltransferase with an Ala-Met mutation in its active site, and (ii) an α2,3-sialyltransferase from Neisseria meningitidis MC58 with a higher transferase activity than the P. multocida enzyme, with either CMP-Neu5Ac or CMP-Leg5Ac7Ac as the donor. These enzymes will enable the production of useful Leg5Ac7Ac glycoconjugate derivatives with either α2,6 or α2,3 linkages and unique biological properties.
Publication date
PublisherOxford University Press
LanguageEnglish
Peer reviewedYes
NRC numberNRC-HHT-53278
NPARC number21275311
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