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- ************************************************************
- * Cereal trypsin/alpha-amylase inhibitors family signature *
- ************************************************************
-
- The seeds of cereals contain numerous serine proteases and alpha-amylase
- inhibitors. These inhibitors can be grouped into families based on structural
- similarities. The cereal trypsin/alpha-amylase inhibitor family [1,2] consists
- of proteins of about 120 amino acids which contain 10 cysteine residues, all
- of which are involved in disulfide bonds. Some of these inhibitors are
- specific to trypsin, others to alpha-amylase, and a few are bifunctional. The
- schematic representation of the structure of these inhibitors is shown below:
-
- +----------------------------+
- +----------+| +-+ |
- *******|**** || | | |
- xxCxxxxxxCxxxCxxxxxxCCxxxCxCxxxxxxxxxxxxxCxxxxxxxxCxxxxxxxCxxxx
- | | | |
- | +---------------------------+ |
- +-------------------------------------------------------+
-
- 'C': conserved cysteine involved in a disulfide bond.
- '*': position of the pattern.
-
- This family of proteins also includes a number of seed allergenic protein from
- rice [3].
-
- -Consensus pattern: C-x(10)-L-x(2)-C-x(2)-[LIVMFY](2)-x(3,4)-C
- [The three 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: Drosophila Notch, human uromodulin,
- human complement receptor 2 and Trypanosoma leucine repeat protein ESAG-8.
- -Last update: June 1994 / Text revised.
-
- [ 1] Gautier M.-F., Alary R., Joudirer P.
- Plant Mol. Biol. 14:313-322(1990).
- [ 2] Garcia-Olmedo F., Salcedo G., Sanchez-Monge R., Gomez L., Royo J.,
- Carbonero P.
- (In) Oxford Surveys of Plant Molecular and Cell Biology, Miflin B., Ed.,
- vol. 4, pp. 275-334, Oxford University Press, Oxford, (1987).
- [ 3] Adachi T., Izumi H., Yamada T., Tanaka K., Takeuchi S., Nakamura R.,
- Matsuda T.
- Plant Mol. Biol. 21:239-248(1993).
-