Structure and Kinetic Investigation of Streptococcus Pyogenes Family Gh38 Alpha-MannosidaseSuits, M.D.L., Zhu, Y., Taylor, E.J., Zechel, D.L., Gilbert, H.J., Davies, G.J.
(2010) PLoS One 5: E9006
- PubMed: 20140249
- DOI: https://doi.org/10.1371/journal.pone.0009006
- Primary Citation of Related Structures:
- PubMed Abstract:
The enzymatic hydrolysis of alpha-mannosides is catalyzed by glycoside hydrolases (GH), termed alpha-mannosidases. These enzymes are found in different GH sequence-based families. Considerable research has probed the role of higher eukaryotic "GH38" alpha-mannosides that play a key role in the modification and diversification of hybrid N-glycans; processes with strong cellular links to cancer and autoimmune disease. The most extensively studied of these enzymes is the Drosophila GH38 alpha-mannosidase II, which has been shown to be a retaining alpha-mannosidase that targets both alpha-1,3 and alpha-1,6 mannosyl linkages, an activity that enables the enzyme to process GlcNAc(Man)(5)(GlcNAc)(2) hybrid N-glycans to GlcNAc(Man)(3)(GlcNAc)(2). Far less well understood is the observation that many bacterial species, predominantly but not exclusively pathogens and symbionts, also possess putative GH38 alpha-mannosidases whose activity and specificity is unknown.
York Structural Biology Laboratory, Department of Chemistry, University of York, York, United Kingdom.