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- ************************************
- * Neuromodulin (GAP-43) signatures *
- ************************************
-
- Neuromodulin (also known as GAP-43, pp46, B-50, F1, and P-57) [1] is an axonal
- membrane protein associated with nerve growth. It is a major component of the
- motile growth cones that form the tips of elongating axons. Neuromodulin is an
- hydrophilic protein of 210 to 240 amino acid residues, which binds calmodulin
- and inhibits phosphatidylinositol phosphate kinase (PIP kinase). It is
- phosphorylated by protein kinase C, and regulates the binding of GTP to G(0)
- [2].
-
- Two functionally important regions of GAP-43 have been characterized: the N-
- terminal extremity of the protein contains two cysteine residues which are
- palmitoylated and are responsible for the attachment of the protein to the
- membrane; about forty residues downstream is a serine residue which can be
- phosphorylated by protein kinase C [3] and which is adjacent to the
- calmodulin-binding domain. We have selected those two regions as signature
- patterns.
-
- -Consensus pattern: <M-L-C-C-[LIVM]-R-R
- [The two C's are palmitoylated]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: S-F-R-G-H-I-T-R-K-K-[LIVM]
- [S is phosphorylated]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: November 1990 / First entry.
-
- [ 1] Skene J.H.P.
- Annu. Rev. Neurosci. 12:127-156(1989).
- [ 2] Strittmatter S.M., Valenzuela D., Kennedy T.E., Neer E.J., Fishman M.C.
- Nature 344:836-841(1990).
- [ 3] Apel E.D., Byford M.F., Au D., Walsh K.A., Storm D.R.
- Biochemistry 29:2330-2335(1990).
-