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- **********************
- * Colipase signature *
- **********************
-
- Colipase [1,2,3] is a protein that functions as a cofactor for pancreatic
- lipase, with which it forms a stoichiometric complex. It also binds to the
- bile-salt covered triacylglycerol interface thus allowing the enzyme to anchor
- itself to the water-lipid interface.
-
- As shown in the following schematic representation, colipase is a small
- protein of approximately 100 amino-acid residues with five conserved disulfide
- bonds.
-
- +--------+
- +--|--+ | +----------+
- | | | | | ***** |
- xxxxxxxxCxxCxCCxxxxxCxxxxCxxxxxCxCxxCxxxxxxxxCxxxx
- | | | |
- +-----------------+ +-----------+
-
- 'C': conserved cysteine involved in a disulfide bond.
- '*': position of the pattern.
-
- As a signature pattern for this protein, we chose a region which includes two
- of the cysteines involved in disulfide bonds, as well as three tyrosine
- residues which seem to be involved in the interfacial binding.
-
- -Consensus pattern: Y-x(2)-Y-Y-x-C-x-C
- [The two 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: June 1994 / Text revised.
-
- [ 1] Erlanson-Albertsson C.
- Biochim. Biophys. Acta 1125:1-7(1992).
- [ 2] Chapus C., Rovery M., Sarda L., Verger R.
- Biochimie 70:1223-1234(1988).
- [ 3] van Tilbeurgh H., Sarda L., Verger R., Cambillau C.
- Nature 359:159-162(1992).
-