B-50 antibody, PP46 antibody, Basp2 antibody, GAP-43 antibody, b-50 antibody, gap-43 antibody, gap43b antibody, pp46 antibody, cb310 antibody, gap antibody, gap43 antibody, gap43a antibody, growth associated protein 43 antibody, growth associated protein 43 L homeolog antibody, growth associated protein 43 S homeolog antibody, GAP43 antibody, Gap43 antibody, gap43.L antibody, gap43 antibody, gap43.S antibody
Background
GAP-43 (growth associated protein 43 kDa, also known as neuromodulin) is a 24 kDa, neuron growth cone-associated member of the neuromodulin family. Apparently due to its tertiary structure, it runs anomalously at 43 kDa on SDS-polyacrylamide gel. Rat GAP-43 is a 226 amino acid (aa) protein that contains an N-terminal lipid binding motif, an 11 aa IQ domain (IQ:Ile-Gln-X-Ser-etc) (aa 38 - 48), and a C-terminus with four potential serine phosphorylation sites. The molecule may utilize the IQ domain to bind calmodulin. Protein kinase C-mediated phosphorylation of the Serine at 41 within this site inhibits this interaction. Unphosphorylated, calmodulin-bound GAP-43 is always associated with neurite retraction, while S41 phosphorylated GAP-43 stabilizes actin filaments and promotes growth cone extension.