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- *********************************************************
- * Insulin-like growth factor binding proteins signature *
- *********************************************************
-
- The insulin-like growth factors (IGF-I and IGF-II) bind to specific binding
- proteins in extracellular fluids with high affinity [1,2]. These IGF-binding
- proteins (IGFBP) prolong the half-life of the IGFs and have been shown to
- either inhibit or stimulate the growth promoting effects of the IGFs on cells
- culture. They seem to alter the interaction of IGFs with their cell surface
- receptors. There are at least six different IGFBPs and they are structurally
- related.
-
- The following growth-factor inducible proteins are structurally related to
- IGFBPs and could function as growth-factor binding proteins [3,4]:
-
- - Mouse protein cyr61 and its probable chicken homolog, protein CEF-10.
- - Human connective tissue growth factor (CTGF) and its mouse homolog, protein
- FISP-12.
- - Chicken protein NOV.
-
- As a signature pattern we have used a conserved cysteine-rich region located
- in the N-terminal section of these proteins.
-
- -Consensus pattern: G-C-G-C-C-x(2)-C-A-x(6)-C
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for IGFBP-6's.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Expert(s) to contact by email: Landale E.C.
- elandale@biotechnet.com
-
- -Last update: June 1994 / Text revised.
-
- [ 1] Clemmons D.R.
- Trends Endocrinol. Metab. 1:412-417(1990).
- [ 2] Baxter R.C.
- Comp. Biochem. Physiol. 91B:229-235(1988).
- [ 3] Bradham D.M., Igarashi A., Potter R.L., Grotendorst G.R.
- J. Cell Biol. 114:1285-1294(1991).
- [ 4] Maloisel V., Martinerie C., Dambrine G., Plassiart G., Brisac M.,
- Crochet J., Perbal B.
- Mol. Cell. Biol. 12:10-21(1992).
-