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  • Title: Binding of the streptococcal surface glycoproteins GspB and Hsa to human salivary proteins.
    Author: Takamatsu D, Bensing BA, Prakobphol A, Fisher SJ, Sullam PM.
    Journal: Infect Immun; 2006 Mar; 74(3):1933-40. PubMed ID: 16495569.
    Abstract:
    GspB and Hsa are homologous surface glycoproteins of Streptococcus gordonii that bind sialic acid moieties on platelet membrane glycoprotein Ibalpha. Since this species is an important member of the oral flora, we examined the direct binding of these adhesins to human salivary proteins. Both GspB and Hsa bound low-molecular-weight salivary mucin MG2 and salivary agglutinin. Hsa also bound several other salivary proteins, including secretory immunoglobulin A. Screening of six oral streptococcal isolates revealed that at least two of the strains expressed GspB homologues. These results indicate that GspB-like adhesins may be important for oral bacterial colonization.
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