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J Bacteriol. 1987 September; 169(9): 3910-3915

Nucleotide sequence of the epidermolytic toxin A gene of Staphylococcus aureus.

ABSTRACT

The nucleotide sequence of the eta gene, which codes for the epidermolytic toxin serotype A of Staphylococcus aureus TC16, is reported. The coding sequence of 840 nucleotides specifies a protein which, when secreted, has a predicted molecular weight of 26,950. The sequence of eta and the deduced amino acid sequence of the toxin have been compared with those of epidermolytic toxin serotype B. The coding sequences have 52% identical residues, and the polypeptides have 40% identical residues. Amino acid residues have been conserved in the areas of the proteins which correspond to major hydrophobic domains, whereas the regions likely to specify antigenic determinants occur in hydrophilic sequences that have diverged. The level of expression of epidermolytic toxin A in S. aureus 8325-4 was shown to be dependent on the integrity of a regulatory gene called agr.

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