2YL5

Inhibition of the pneumococcal virulence factor StrH and molecular insights into N-glycan recognition and hydrolysis

Summary for 2YL5

• Entry DOI: 10.2210/pdb2yl5/pdb
• Related: 2YL6 2YL8 2YL9 2YLA
• Descriptor: BETA-N-ACETYLHEXOSAMINIDASE, MAGNESIUM ION, 1,2-ETHANEDIOL, ... (4 entities in total)
• Functional Keywords: hydrolase
• Biological source: STREPTOCOCCUS PNEUMONIAE
• Cellular location: Secreted, cell wall; Peptidoglycan-anchor (Potential): P49610
• Total number of polymer chains: 4
• Total formula weight: 199522.82

Authors

Pluvinage, B.,Higgins, M.A.,Abbott, D.W.,Robb, C.,Dalia, A.B.,Deng, L.,Weiser, J.N.,Parsons, T.B.,Fairbanks, A.J.,Vocadlo, D.J.,Boraston, A.B. (deposition date: 2011-05-31, release date: 2011-09-14, Last modification date: 2024-05-08)

Primary citation

Pluvinage, B.,Higgins, M.A.,Abbott, D.W.,Robb, C.,Dalia, A.B.,Deng, L.,Weiser, J.N.,Parsons, T.B.,Fairbanks, A.J.,Vocadlo, D.J.,Boraston, A.B.
Inhibition of the Pneumococcal Virulence Factor Strh and Molecular Insights Into N-Glycan Recognition and Hydrolysis.
Structure, 19:1603-, 2011

PubMed Abstract: The complete degradation of N-linked glycans by the pathogenic bacterium Streptococcus pneumoniae is facilitated by the large multimodular cell wall-attached exo-β-D-N-acetylglucosaminidase StrH. Structural dissection of this virulence factor using X-ray crystallography showed it to have two structurally related glycoside hydrolase family 20 catalytic domains, which displayed the expected specificity for complex N-glycans terminating in N-acetylglucosamine but exhibited unexpected differences in their preferences for the substructures present in these glycans. The structures of the two catalytic domains in complex with unhydrolyzed substrates, including an N-glycan possessing a bisecting N-acetylglucosamine residue, revealed the specific architectural features in the active sites that confer their differential specificities. Inhibitors of StrH are demonstrated to be effective tools in modulating the interaction of StrH with components of the host, such as the innate immune system. Overall, new structural and functional insight into a carbohydrate-mediated component of the pneumococcus-host interaction is provided.

PubMed: 22078560
DOI: 10.1016/J.STR.2011.08.011

Experimental method

X-RAY DIFFRACTION (2.15 Å)