This gene encodes a highly abundant bone protein secreted by osteoblasts that regulates bone remodeling and energy metabolism. The encoded protein contains a Gla (gamma carboxyglutamate) domain, which functions in binding to calcium and hydroxyapatite, the mineral component of bone. Serum osteocalcin levels may be negatively correlated with metabolic syndrome. Read-through transcription exists between this gene and the neighboring upstream gene, PMF1 (polyamine-modulated factor 1), but the encoded protein only shows sequence identity with the upstream gene product. [provided by RefSeq, Jun 2015]
Molecular Weight(MW)
11 kDa
Function
Osteocalcin belongs to the osteocalcin/matrix Gla-protein family and constitutes 1-2% of the total bone protein. It binds strongly to apatite and calcium. Gamma-carboxyglutamate residues are formed by vitamin K dependent carboxylation. These residues are essential for the binding of calcium.
Cellular Localization
Secreted
Application
WB
Western blot analysis of Mouse kidney and Rat kidney lysates using Osteocalcin Goat pAb
IF
Immunofluorescence analysis of Human kidney cancer tissue using Osteocalcin Goat pAb