M protein

1. Galactoside carrier in E. Coli

2. Cell surface antigen of Brucella.

3. Structural protein in the M line of striated muscle (myomesin). (4) Cell wall protein of streptococci: antibody typing of the M protein is important in identification of different strains of Group A streptococci (at least 55 serotypes are known). The M protein confers antiphagocytic properties on the cell and is present as hair like fimbriae on the surface. M protein is an important virulence factor and antibodies directed against M protein are essential for phagocytic killing of the bacteria.

(18 Nov 1997)


Terms mentioned in text: galactoside, carrier, e. coli, cell, surface, antigen, brucella, structural, protein, m line, striated muscle, myomesin, cell wall, streptococci, antibody, typing, m protein, identification, strains, group, least, serotypes, antiphagocytic, properties, cell, present, hair, fimbriae, surface, virulence, factor, antibodies, essential, phagocytic, bacteria
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