Characterization of two proteins of Staphylococcus aureus isolated from bovine clinical mastitis with homology to glyceraldehyde-3-phosphate dehydrogenase
2004
Goji, Noriko | Potter, Andrew A. | Perez-Casal, Jose
Staphylococcus aureus is the most common causative agent of bovine mastitis and vaccines developed to control this disease showed limited protection due in part to the lack of common antigens among the mastitis isolates. We isolated and identified two genes encoding proteins with glyceraldehyde-3-phosphate dehydrogenase (GAPDH) activity from a S. aureus strain isolated from bovine clinical mastitis. The GapB and GapC proteins share considerable homology to the GapB and GapC products of human strains of S. aureus. These two proteins could be distinguished by their different GAPDH activities and binding to bovine transferrin properties. Both gapB and gapC genes were conserved in 11 strains tested, and the GapC protein was present on the surface of all S. aureus strains.
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