Download MendeleyStructural and Functional Analysis of Cell Wall-anchored Polypeptide Adhesin BspA in Streptococcus agalactiae.
Rego, S., Heal, T.J., Pidwill, G.R., Till, M., Robson, A., Lamont, R.J., Sessions, R.B., Jenkinson, H.F., Race, P.R., Nobbs, A.H.(2016) J Biol Chem 291: 15985-16000
- PubMed: 27311712
- DOI: https://doi.org/10.1074/jbc.M116.726562
- Primary Citation of Related Structures:
5DZ8, 5DZ9, 5DZA - PubMed Abstract:
Streptococcus agalactiae (group B Streptococcus, GBS) is the predominant cause of early-onset infectious disease in neonates and is responsible for life-threatening infections in elderly and immunocompromised individuals. Clinical manifestations of GBS infection include sepsis, pneumonia, and meningitis. Here, we describe BspA, a deviant antigen I/II family polypeptide that confers adhesive properties linked to pathogenesis in GBS. Heterologous expression of BspA on the surface of the non-adherent bacterium Lactococcus lactis confers adherence to scavenger receptor gp340, human vaginal epithelium, and to the fungus Candida albicans Complementary crystallographic and biophysical characterization of BspA reveal a novel β-sandwich adhesion domain and unique asparagine-dependent super-helical stalk. Collectively, these findings establish a new bacterial adhesin structure that has in effect been hijacked by a pathogenic Streptococcus species to provide competitive advantage in human mucosal infections.
Organizational Affiliation:
From the School of Oral and Dental Sciences, University of Bristol, Bristol BS1 2LY, United Kingdom, the School of Biochemistry, University of Bristol, Bristol BS8 1TD, United Kingdom.
