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- **********************************************************
- * Platelet-derived growth factor (PDGF) family signature *
- **********************************************************
-
- Platelet-derived growth factor (PDGF) [1,2] is a potent mitogen for cells of
- mesenchymal origin, including smooth muscle cells and glial cells. PDGF
- consists of two different but closely related chains (A and B chains) which
- assemble to form disulfide linked homo- or heterodimers (A-A, B-B, an A-B).
- Alternate splicing of the A chain transcript can give rise to two different
- forms that differ only in their C-terminal extremity. The transforming protein
- of simian sarcoma virus (SSV), encoded by the v-sis oncogene, is derived from
- the B chain of PDGF.
-
- Vascular endothelial growth factor (VEGF), also known as vascular permeability
- factor (VPF) [3,4], is a growth factor active in angiogenesis and endothelial
- cell growth. Structurally VEGF is a disulfide-linked homodimer. The sequence
- of the VEGF chain is related to that of the chains of PDGF.
-
- As a signature pattern for this family of growth factors, we selected a region
- that include four of the eight cysteines conserved in the sequences of these
- proteins. In PDGF, these cysteines are known to be involved in intra- and
- inter-chain disulfide bonds [5].
-
- -Consensus pattern: C-V-x(3)-R-C-x-G-C-C-N
- [The four 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: December 1992 / Text revised.
-
- [ 1] Hannink M., Donoghue D.J.
- Biochim. Biophys. Acta 989:1-10(1989).
- [ 2] Heldin C.-H.
- EMBO J. 11:4251-4259(1992).
- [ 3] Lewung D.W., Cachianes G., Kuang W.-J., Goeddel D.V., Ferrara N.
- Science 246:1306-1309(1989).
- [ 4] Keck P.J., Hauser S.D., Krivi G., Sanzo K., Warren T., Feder J.,
- Connolly D.T.
- Science 246:1309-1312(1989).
- [ 5] Oefner C., d'Arcy A., Winkler F.K., Eggimann B., Hosang M.
- EMBO J. 11:3921-3926(1992).
-