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- * Staphyloccocal enterotoxins / Streptococcal pyrogenic exotoxins signatures *
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-
- Staphyloccocal enterotoxins and streptococcal pyrogenic exotoxins constitute a
- family of biologically and structurally related toxins produced by
- Staphylococcus aureus and Streptococcus pyogenes [1,2]. These toxins share
- the ability to bind to the major histocompatibility complex proteins of their
- hosts. The toxins that belong to this family are:
-
- - Staphyloccocal enterotoxins are the cause of staphylococcal food poisoning
- syndrome. The sequence of six different enterotoxins is known: SEA, SEB,
- SEC1, SEC3, SED, and SEE.
- - Streptococcal pyrogenic exotoxins are the causative agents of the symptoms
- associated with scarlet fever. The sequence of two pyrogenic exotoxins is
- known: SPEA, and SPEC.
- - Staphylococcus aureus toxic shock syndrome toxin-1 (TSST-1).
-
- While the enterotoxins and the pyrogenic exotoxins are closely related, TSST-1
- seems to be only distantly related to the other toxins. We developed two
- patterns for this family of toxins. The first one is based on a well conserved
- region of enterotoxins and pyrogenic exotoxins, but which does not pick up
- TSST-1; the second pattern is derived from a more diffuse region of similarity
- common to all these toxins.
-
- -Consensus pattern: Y-G-G-[LIV]-T-x(4)-N
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for TSST-1.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: K-x(2)-[LIV]-x(4)-[LIV]-D-x(3)-R-x(2)-L-x(5)-[LIV]-Y
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: June 1990 / Text revised.
-
- [ 1] Iandolo J.J.
- Annu. Rev. Microbiol. 43:375-402(1989).
- [ 2] Marrack P., Kappler J.
- Science 248:705-711(1990).
-