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- * Receptor tyrosine kinase class III signature *
- ************************************************
-
- A number of growth factors stimulate mitogenesis by interacting with a family
- of cell surface receptors which possess an intrinsic, ligand-sensitive,
- protein tyrosine kinase activity [1]. These receptor tyrosine kinases (RTK)
- all share the same topology: an extracellular ligand-binding domain, a single
- transmembrane region and a cytoplasmic kinase domain. However they can be
- classified into at least five groups. The class III RTK's are characterized
- by the presence of five to seven immunoglobulin-like domains [2] in their
- extracellular section. Their kinase domain differs from that of other RTK's by
- the insertion of a stretch of 70 to 100 hydrophilic residues in the middle of
- this domain. The receptors currently known to belong to class III are:
-
- - Platelet-derived growth factor receptor (PDGF-R). PDGF-R exists as a homo-
- or heterodimer of two related chains: alpha and beta [3].
- - Macrophage colony stimulating factor receptor (CSF-1-R) (also known as the
- fms oncogene).
- - Stem cell factor (mast cell growth factor) receptor (also known as the kit
- oncogene).
- - Vascular endothelial growth factor (VEGF) receptors Flt-1 and Flk-1/KDR
- [4].
- - Fl cytokine receptor Flk-2/Flt-3 [5].
- - The putative receptor Flt-4 [7].
-
- We developed a signature pattern for this class of RTK's which is based on a
- conserved region in the kinase domain.
-
- -Consensus pattern: G-x-H-x-N-[LIVM]-V-N-L-L-G-A-C-T
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1994 / Pattern and text revised.
-
- [ 1] Yarden Y., Ullrich A.
- Annu. Rev. Biochem. 57:443-478(1988).
- [ 2] Hunkapiller T., Hood L.
- Adv. Immunol. 44:1-63(1989).
- [ 3] Lee K.-H., Bowen-Pope D.F., Reed R.R.
- Mol. Cell. Biol. 10:2237-2246(1990).
- [ 4] Terman B.I., Dougher-Vermazen M., Carrion M.E., Dimitrov D.,
- Armellino D.C., Gospodarowicz D., Boehlen P.
- Biochem. Biophys. Res. Commun. 187:1579-1586(1992).
- [ 5] Lyman S.D., James L., Vanden Bos T., de Vries P., Brasel K., Gliniak B.,
- Hollingsworth L.T., Picha K.S., McKenna H.J., Splett R.R.
- Cell 75:1157-1167(1993).
- [ 6] Galland F., Karamysheva A., Pebusque M.J., Borg J.P., Rottapel R.,
- Dubreuil P., Rosnet O., Birnbaum D.
- Oncogene 8:1233-1240(1993).
-