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Structural characterization of the carbohydrate-binding module of NanA sialidase, a pneumococcal virulence factor
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dc.contributor.author | Yang, Lei | |
dc.contributor.author | Connaris, Helen | |
dc.contributor.author | Potter, Jane Alexandra | |
dc.contributor.author | Taylor, Garry Lindsay | |
dc.date.accessioned | 2015-09-09T10:10:03Z | |
dc.date.available | 2015-09-09T10:10:03Z | |
dc.date.issued | 2015-08-20 | |
dc.identifier | 215640635 | |
dc.identifier | b952a97c-d8a7-4179-9e78-bb2b355d4e94 | |
dc.identifier | 000359756600001 | |
dc.identifier | 84939537242 | |
dc.identifier | 000359756600001 | |
dc.identifier.citation | Yang , L , Connaris , H , Potter , J A & Taylor , G L 2015 , ' Structural characterization of the carbohydrate-binding module of NanA sialidase, a pneumococcal virulence factor ' , BMC Structural Biology , vol. 15 , 15 . https://doi.org/10.1186/s12900-015-0042-4 | en |
dc.identifier.issn | 1472-6807 | |
dc.identifier.other | ORCID: /0000-0001-9486-566X/work/60428029 | |
dc.identifier.uri | https://hdl.handle.net/10023/7424 | |
dc.description | This research was supported by the University of St Andrews and grants provided by the Medical Research Council. | en |
dc.description.abstract | Background: Streptococcus pneumoniae Neuraminidase A (NanA) is a multi-domain protein anchored to the bacterial surface. Upstream of the catalytic domain of NanA is a domain that conforms to the sialic acid-recognising CBM40 family of the CAZY (carbohydrate-active enzymes) database. This domain has been identified to play a critical role in allowing the bacterium to promote adhesion and invasion of human brain microvascular endothelial cells, and hence may play a key role in promoting bacterial meningitis. In addition, the CBM40 domain has also been reported to activate host chemokines and neutrophil recruitment during infection. Results: Crystal structures of both apo- and holo- forms of the NanA CBM40 domain (residues 121 to 305), have been determined to 1.8 angstrom resolution. The domain shares the fold of other CBM40 domains that are associated with sialidases. When in complex with alpha 2,3- or alpha 2,6-sialyllactose, the domain is shown to interact only with the terminal sialic acid. Significantly, a deep acidic pocket adjacent to the sialic acid-binding site is identified, which is occupied by a lysine from a symmetry-related molecule in the crystal. This pocket is adjacent to a region that is predicted to be involved in protein-protein interactions. Conclusions: The structural data provide the details of linkage-independent sialyllactose binding by NanA CBM40 and reveal striking surface features that may hold the key to recognition of binding partners on the host cell surface. The structure also suggests that small molecules or sialic acid analogues could be developed to fill the acidic pocket and hence provide a new therapeutic avenue against meningitis caused by S. pneumoniae. | |
dc.format.extent | 10 | |
dc.format.extent | 2435922 | |
dc.language.iso | eng | |
dc.relation.ispartof | BMC Structural Biology | en |
dc.subject | Streptococcus-pneumoniae | en |
dc.subject | Respiratory-tract | en |
dc.subject | Crystal-structure | en |
dc.subject | Site prediction | en |
dc.subject | Neuraminidase | en |
dc.subject | QH301 Biology | en |
dc.subject.lcc | QH301 | en |
dc.title | Structural characterization of the carbohydrate-binding module of NanA sialidase, a pneumococcal virulence factor | en |
dc.type | Journal article | en |
dc.contributor.sponsor | Medical Research Council | en |
dc.contributor.sponsor | Medical Research Council | en |
dc.contributor.institution | University of St Andrews. School of Biology | en |
dc.contributor.institution | University of St Andrews. Office of the Principal | en |
dc.contributor.institution | University of St Andrews. Biomedical Sciences Research Complex | en |
dc.identifier.doi | 10.1186/s12900-015-0042-4 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | G0902201 | en |
dc.identifier.grantnumber | MR/L012847/1 | en |
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