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- ***************************
- * Interleukin-1 signature *
- ***************************
-
- Interleukin-1 (IL-1) [1,2] is a member of a family of cellular mediators known
- as cytokines. IL-1 has many biological activities. Among other functions, it
- is a fever-producing factor (pyrogen), induces prostaglandin synthesis, is
- involved in T-lymphocyte activation and proliferation as well as in
- B-lymphocyte activation and proliferation via interleukin-2.
-
- There are two different forms of IL-1: IL-1 alpha and IL-1 beta, whose
- sequence are about 25% identical. IL-1 alpha and beta bind to the same
- receptor. Both forms of are synthesized as precursor proteins of about 270
- residues which are then post-translationally processed by the cleavage of a N-
- terminal sequence of approximately 115 residues.
-
- The interleukin-1 receptor antagonist (IL-1ra) [3] is a protein structurally
- related to IL-1's but whose biological function is not yet known.
-
- As a signature pattern for these cytokines, we selected a conserved region in
- the C-terminal section.
-
- -Consensus pattern: F-x(10)-F-x-S-[ALV]-x(2)-[AP]-x(2)-[FYLIV]-[LIV]-x-T
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: October 1993 / Text revised.
-
- [ 1] Dinarello C.A.
- FASEB J. 2:108-115(1988).
- [ 2] Mizel S.B.
- FASEB J. 3:2379-2388(1989).
- [ 3] Eisenberg S.P., Evans R.J., Arend W.P., Verderber E., Brewer M.T.,
- Hannum C.H., Thompson R.C.
- Nature 343:341-346(1990).
-