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Human GPNMB / Osteoactivin Protein (His Tag)

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Human GPNMB Protein Product Information
Synonym:UNQ1725 / PRO9925, HGFIN, NMB
Protein Construction:A DNA sequence encoding the human GPNMB isoform 2 (Q14956-2) extracellular domain (Met 1-Pro 474) was fused with a polyhistidine tag at the C-terminus.
Expressed Host:Human Cells
Shipping:In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Human GPNMB Protein QC Testing
Purity:> 98 % as determined by SDS-PAGE
Endotoxin:< 1.0 EU per μg of the protein as determined by the LAL method
Stability:Samples are stable for up to twelve months from date of receipt at -70℃
Predicted N Terminal:Ala 22
Molecule Mass:The recombinant human GPNMB consists of 464 amino acids and predictes a molecular mass of 52.1 kDa. In SDS-PAGE under reducing conditions, the apparent molecular mass of rhGPNMB is approximately 85-90 kDa due to glycosylation.
Formulation:Lyophilized from sterile PBS, pH 7.4
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Human GPNMB Protein Usage Guide
Storage:Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution:A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
Human GPNMB Protein SDS-PAGE
Human GPNMB / Osteoactivin Protein (His Tag) SDS-PAGE
Other GPNMB Recombinant Protein Products
GPNMB/Osteoactivin Background

GPNMB belongs to the PMEL / NMB family, also known as Osteoactivin and Hematopoietic growth factor-inducible neurokinin 1 ( HGFIN ), is a transmembrane glycoprotein that is expressed in numerous cells, including osteoclasts, macrophages, dendritic cells, and tumor cells. It is suggested to influence osteoblast maturation, cell adhesion and migration. GPNMB protein acts as a downstream mediator of BMP-2 effects on osteoblast differentiation and function. GPNMB participates in bone mineralization, and functions as a negative regulator of inflammation in macrophages. Osteoactivin is expressed at high levels in normal and inflammatory liver macrophages suggesting a significant role in acute liver injury. The early-phase upregulation of Osteoactivin expression in the tubular epithelium in response to renal injury might play a role in triggering renal interstitial fibrosis via activation of matrix metalloproteinase expression and collagen remodeling in rats. Osteoactivin as a protein that is expressed in aggressive human breast cancers and is capable of promoting breast cancer metastasis to bone.

Human GPNMB/Osteoactivin References
  • Pahl MV. et al., 2010, Clin J Am Soc Nephrol. 5(1): 56-61.
  • Abdelmagid SM. et al., 2008, Exp Cell Res. 314(13): 2334-51.
  • Haralanova-Ilieva B. et al., 2005, J Hepatol. 242(4): 565-72.
  • Abdelmagid SM. et al., 2007, J Cell Physiol. 210(1): 26-37.
  • Furochi H. et al., 2007, J Med Invest. 54(3-4): 248-54.
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    Catalog: 11305-H08H-50
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