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Biochem Biophys Res Commun. 2000 Nov 30;278(3):826-32.

Analysis of expression of a cytosolic enzyme on the surface of Streptococcus pyogenes.

Author information

1
Department of Microbiology and Immunology, Medical College of Ohio, Toledo, Ohio, USA.

Abstract

The normally cytosolic glycolytic enzyme, glyceraldehyde-3-phosphate dehydrogenase, (GAPDH) has been reported to be expressed on the surface of Streptococcus pyogenes, group A, where it can act as a plasmin binding protein (Plr), and potentially a signaling molecule. In studies of wild-type and isogenic mutants, an association between surface expression of antigenic GAPDH/Plr and M and M-related fibrinogen-binding proteins was identified. Inactivation of the mga gene, whose product controls expression of M and M-related proteins also influenced expression of surface GAPDH/Plr. Revertants or pseudorevertants of mga mutants led to concomitant re-expression of surface GAPDH/Plr and M and M-related proteins. Using surface enhanced laser desorption ionization (SELDI) mass spectroscopy, a physical association between GAPDH/Plr and streptococcal fibrinogen-binding proteins was demonstrated. These studies support the hypothesis that surface M and M-related proteins are involved in anchoring GAPDH/Plr on the surface of group A streptococci.

PMID:
11095992
DOI:
10.1006/bbrc.2000.3884
[Indexed for MEDLINE]

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