Furthermore a metal binding site is identified, containing a bound calcium ion. The structure was solved to 1.8 Å resolution and shows that the C 2–3-domain is comprised of two structurally similar DEv-IgG motifs, designated C 2 and C 3, both containing a stabilizing covalent isopeptide bond. ![]() In the present study we have determined the crystal structure of the C 2–3-domain of the antigen I/II type protein AspA from S. The antigen I/II family proteins are cell wall anchored adhesin proteins found on the surfaces of most oral streptococci and are involved in host colonization and biofilm formation. ![]() The pathogenic bacteria Streptococcus pyogenes can cause an array of diseases in humans, including moderate infections such as pharyngitis (strep throat) as well as life threatening conditions such as necrotizing fasciitis and puerperal fever.
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