Download MendeleyThe structural basis for T-antigen hydrolysis by Streptococcus pneumoniae: a target for structure-based vaccine design.
Caines, M.E., Zhu, H., Vuckovic, M., Willis, L.M., Withers, S.G., Wakarchuk, W.W., Strynadka, N.C.(2008) J Biol Chem 283: 31279-31283
- PubMed: 18784084
- DOI: https://doi.org/10.1074/jbc.C800150200
- Primary Citation of Related Structures:
3ECQ - PubMed Abstract:
Streptococcus pneumoniae endo-alpha-N-acetylgalactosaminidase is a cell surface-anchored glycoside hydrolase from family GH101 involved in the breakdown of mucin type O-linked glycans. The 189-kDa mature enzyme specifically hydrolyzes the T-antigen disaccharide from extracellular host glycoproteins and is representative of a broadly important class of virulence factors that have remained structurally uncharacterized due to their large size and highly modular nature. Here we report a 2.9 angstroms resolution crystal structure that remarkably captures the multidomain architecture and characterizes a catalytic center unexpectedly resembling that of alpha-amylases. Our analysis presents a complete model of glycoprotein recognition and provides a basis for the structure-based design of novel Streptococcus vaccines and therapeutics.
Organizational Affiliation:
Department of Biochemistry and Molecular Biology, Centre for Blood Research and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, V6T 1Z3.
