REPS2 Antibody (N-Term) Blocking Peptide

The product of this gene is part of a protein complex that regulates the endocytosis of growth factor receptors. The encoded protein directly interacts with a GTPase activating protein that functions downstream of the small G protein Ral. Its expression can negatively affect receptor internalization and inhibit growth factor signaling. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

REPS2: an adaptor protein involved in growth factor signaling through its influence on the Ral, a small G protein that regulates endocytosis of EGF and insulin receptors. Interacts with DDEF1, paxillin, RALBP1 and GRB2. Binding to RALBP1 does not affect the Ral-binding activity of the latter. Forms a ternary complex with activated Ral and RALBP1. Binds epsin 1. Relatively highly expressed in androgen-dependent as compared to androgen-independent prostate cancer cell lines and xenografts. EGF receptor internalization and signalling is inhibited by increased expression of REPS2. EGF stimulates phosphorylation on Tyr-residues and induces complex formation with EGF receptor through an adapter protein such as GRB2. Two alternatively spliced isoforms have been described. Isoform 2 is down-regulated during progression of prostate cancer.

Protein type: G protein regulator, misc.; Adaptor/scaffold

Chromosomal Location of Human Ortholog: Xp22.2

Molecular Function: protein binding

Biological Process: epidermal growth factor receptor signaling pathway; protein complex assembly