Osteoactivin/GPNMB Antibody (1077401) [Alexa Fluor® 350]

• Reactivity: Hu
• Applications: IHC, ICC/IF
• Clone: 1077401
• Clonality: Monoclonal
• Host: Mouse
• Conjugate: Alexa Fluor 350

Osteoactivin/GPNMB Antibody (1077401) [Alexa Fluor® 350] Summary

• Immunogen: Mouse myeloma cell line NS0-derived recombinant human Osteoactivin
  Met1-Pro486
  Accession # Q14956
• Specificity: Detects rhOsteoactivin in Direct ELISA.
• Isotype: IgG2b
• Clonality: Monoclonal
• Host: Mouse
• Purity: Protein A or G purified

Applications/Dilutions

• Dilutions:
  • Immunocytochemistry
  • Immunohistochemistry

Packaging, Storage & Formulations

• Storage: Protect from light. Do not freeze. 12 months from date of receipt, 2 to 8 °C as supplied
• Buffer: Supplied 0.2mg/ml in 1X PBS with RDF1 and 0.09% Sodium Azide
• Purity: Protein A or G purified

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Osteoactivin/GPNMB Antibody (1077401) [Alexa Fluor® 350]

• DC-HIL
• glycoprotein (transmembrane) nmb
• glycoprotein NMB
• GPNMB
• HGFIN
• HGFINglycoprotein nmb-like protein
• NMBosteoactivin
• Osteoactivin
• Transmembrane glycoprotein HGFIN
• transmembrane glycoprotein NMB

Background

Osteoactivin (also GPNMB and DC-HIL) is a variably glycosylated 75-125 kDa member of the NMB/pMEL-17 family of molecules. It is found in multiple subcellular sites, but is most often associated with the endosomal/lysosomal compartment (1-3). Human Osteoactivin is a 560 amino acid (aa) type I transmembrane protein. Its precursor contains a 21 aa signal sequence, a 465 aa luminal/extracellular domain, a 21 aa transmembrane segment and a 53 aa cytoplasmic tail (4, 5). The luminal region contains an N-terminal heparin-binding motif (aa 23-26), multiple glycosylation sites, an RGD motif (aa 64-66) and an 88 aa PKD domain (aa 240-327). The intracellular tail has an ITAM (Y-x-x-I) and lysosomal targeting (L-L) motif (4, 5). The extracellular/luminal region shares 74% and 77% aa identity with the equivalent regions in mouse and canine, respectively. Multiple isoforms would appear to exist. There is one alternate splice form known that shows a 12 aa insert between aa 339-340 (6). An addtional 206 aa isoform shows a mutation at position # 181 that results in a 26 aa substitution for the C-terminal 380 amino acids (7, 8). This has the potential to be soluble and may represent a counterpart to a secreted isoform of rat Osteoactivin (9). Cells known to express Osteoactivin include macrophages/Kupffer cells, fibroblasts, osteoblasts, myeloid dendritic cells, retinal pigment epithelial cells and melanocytes, plus fetal chondrocytes and stratum basale keratinocytes (3-5, 10-12). In mice, Osteoactivin is reported to bind to heparan sulfate-proteoglycan, possibly on the surface of endothelial cells and may also interact with integrins (13). It also appears to act as an inflammatory suppressor gene, as its expression downregulates the macrophage inflammatory response by inhibiting IL-6 and IL-12 p40 production (3).

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.