|Alkaline Phosphatase Production Induced by GDF‑5 and Neutralization by Mouse GDF‑5 Antibody. Recombinant Mouse GDF‑5 (Catalog # 853‑G5) induces alkaline phosphatase production in the ATDC5 mouse chondrogenic cell line in a dose-dependent manner (orange line). Alkaline phosphatase production elicited by Recombinant Mouse GDF‑5 (3 µg/mL) is neutralized (green line) by increasing concentrations of Rat Anti-Mouse GDF‑5 Monoclonal Antibody (Catalog # MAB8531). The ND50 is typically 2-10 µg/mL.|
Growth Differentiation Factor 5 (GDF-5), also known as cartilage-derived morphogenetic protein 1 (CDMP-1) and BMP-14, is a member of the bone morphogenetic protein (BMP) family which belongs to the transforming growth factor beta (TGF‑ beta ) superfamily. GDF-5 is synthesized as a large precursor protein that consists of an N‑terminal 19 amino acid (aa) signal sequence, a 362 aa pro region and a 120 aa C-terminal mature peptide. Mature GDF-5 is a homodimeric protein which contains the characteristic seven conserved cysteine residues. GDF-5, GDF-6 and GDF-7, which share 80‑86% identity, define a subgroup within the BMP family. Like other TGF‑ beta superfamily proteins, GDF-5 is highly conserved across species. At the amino acid sequence level, mature human and mouse GDF-5 are 98% identical. It has been reported that GDF-5 has multiple functions including regulation of myogenesis, regulation of chondrogenesis, bone morphogenesis, and neuron differentiation and survival. GDF-5 response is mediated by the formation of hetero-oligomeric complexes of type I (BMPR-IB) and type II (BMPR-II or Activin R-II) sereine/threonine kinase receptors, and the activation of Smad proteins (Smad 1, 5, and 8).
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