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- **************************************
- * Heat-stable enterotoxins signature *
- **************************************
-
- Prokaryotic heat-stable enterotoxins [1] are responsible for acute diarrhea.
- The active toxin is a short peptide of around twenty residues which contains
- six cysteines involved in three disulfide bonds, as shown in the following
- schematic representation:
-
- +-------+
- +--|----+ |
- | | | |
- xxCCxxCCxxxCxxCxx
- | |
- +----+
-
- 'C': conserved cysteine involved in a disulfide bond.
-
- We have taken the pattern of cysteines, along with three conserved residues,
- as a signature pattern for this group of proteins
-
- -Consensus pattern: C-C-x(2)-C-C-x-P-A-C-x-G-C
- [The six C's are involved in disulfide bonds]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: April 1990 / Pattern and text revised.
-
- [ 1] Shimonishi Y., Hidaka Y., Koizumi M., Hane M., Aimoto S., Takeda T.,
- Miwatani T., Takeda Y.
- FEBS Lett. 215:165-170(1987).
-