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- ************************
- * Involucrin signature *
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-
- Involucrin [1] is a protein present in keratinocytes of epidermis and other
- stratified squamous epithelia. Involucrin first appears in the cell cytosol,
- but ultimately becomes cross-linked to membrane proteins by transglutaminase
- thus helping in the formation of an insoluble envelope beneath the plasma
- membrane.
-
- Structurally involucrin consists of a conserved region of about 75 amino acid
- residues followed by two extremely variable length segments that contain
- glutamine-rich tandem repeats. The glutamine residues in the tandem repeats
- are the substrate for the tranglutaminase in the cross-linking reaction. The
- total size of the protein varies from 285 residues (in dog) to 835 residues
- (in orangutan).
-
- The signature pattern for involucrin corresponds to the N-terminal extremity
- of the protein,
-
- -Consensus pattern: <M-S-Q-Q-x-T-L-P-V-T-L
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: December 1992 / First entry.
-
- [ 1] Green H., Djian P.
- Mol. Biol. Evol. 9:977-1017(1992).
-