Glypican 1 (GPC1) Antibody – Mouse Monoclonal

GPC1: Cell surface proteoglycan that bears heparan sulfate. Binds, via the heparan sulfate side chains, alpha-4 (V) collagen and participates in Schwann cell myelination. May act as a catalyst in increasing the rate of conversion of prion protein PRPN(C) to PRNP(Sc) via associating (via the heparan sulfate side chains) with both forms of PRPN, targeting them to lipid rafts and facilitating their interaction. Required for proper skeletal muscle differentiation by sequestering FGF2 in lipid rafts preventing its binding to receptors (FGFRs) and inhibiting the FGF-mediated signaling. Associates (via the heparan sulfate side chains) with fibrillar APP-beta amyloid peptides in primitive and classic amyloid plaques and may be involved in the deposition of these senile plaques in the Alzheimer disease (AD) brain. Misprocessing of GPC1 is found in fibroblasts of patients with Niemann-Pick Type C1 disease. This is due to the defective deaminative degradation of heparan sulfate chains. Belongs to the glypican family.

Protein type: Extracellular matrix; Membrane protein, GPI anchor; Motility/polarity/chemotaxis

Chromosomal Location of Human Ortholog: 2q35-q37

Cellular Component: lysosomal lumen; proteinaceous extracellular matrix; extracellular space; integral to plasma membrane; Golgi lumen; plasma membrane; endosome; lipid raft

Molecular Function: heparan sulfate proteoglycan binding; fibroblast growth factor binding; copper ion binding; laminin binding

Biological Process: axon guidance; phototransduction, visible light; heparan sulfate proteoglycan catabolic process; glycosaminoglycan metabolic process; negative regulation of fibroblast growth factor receptor signaling pathway; pathogenesis; Schwann cell differentiation; chondroitin sulfate metabolic process; glycosaminoglycan biosynthetic process; myelin formation; glycosaminoglycan catabolic process; carbohydrate metabolic process; retinoid metabolic process