- Catalog number
- PB9559
- Size / count
- 100 µg/Vial
- Dry ice
- No
- Hazardous
- No
- Discontinued
- No
- Background
- SPARC, secreted protein acidic and rich in cysteine , also known as Osteonectin is a protein that in humans is encoded by the SPARC gene. The human SPARC gene is 26.5 kb long, and contains 10 exons and 9 introns and is located on chromosome 5q31-q33. SPARC is a glycoprotein of 40 kD. SPARC is an acidic, cysteine-rich glycoprotein consisting of a single polypeptide chain that can be broken into 4 domains: 1) an Ca++ binding domains near the glutamic acidic-rich region at the amino terminus (domain I), 2) a cysteine- rich (domain II), 3) a hydrophilic region (domain III) and 4) an EF hand motif at the carboxy terminus region (domain IV) . Osteonectin is a glycoprotein in the bone that binds sodium. It is secreted by osteoblasts during bone formation, initiating mineralization and promoting mineral crystal formation. Osteonectin also shows affinity for collagen in addition to bone mineral calcium. A correlation between osteonectin over expression and ampullary cancers and chronic pancreatitis has been found.
- Synonyms
- SPARC; Basement-membrane protein 40; BM-40; Osteonectin; ON; Secreted protein acidic and rich in cysteine; SPARC; ON
- Gene Name
- SPARC
- Gene ID
- 6678
- UniProt
- P09486
- Host
- Rabbit
- Reactivity
- Human
- Cross Reactivity
- No cross-reactivity with other proteins
- Immunogen
- A synthetic peptide corresponding to a sequence at the C-terminus of human SPARC, different from the related mouse and rat sequences by four amino acids.
- Clonality
- Polyclonal
- Tissue Specificity
- Abundant in brain.
- Applications
- WB
- Field of Research
- Angiogenesis, Cancer, Cardiovascular, Cell Biology, Cell Cycle, Cell Cycle Inhibitors, Cytoskeleton/ECM, Developmental Biology, Extracellular Matrix, Lineage Markers, Lineage Specification, Mesenchymal Stem Cells, Protein Phosphorylation, Receptor Tyrosine Kinases, Signal Transduction, Stem Cells, Structures, Tyrosine Kinases
- Purification
- Immunogen affinity purified.
- Concentration
- Adding 0.2 ml of distilled water will yield a concentration of 500 μg/ml.
- Form
- Lyophilized
- Reconstitution
- Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
- Function
- Appears to regulate cell growth through interactions with the extracellular matrix and cytokines. Binds calcium and copper, several types of collagen, albumin, thrombospondin, PDGF and cell membranes. There are two calcium binding sites; an acidic domain that binds 5 to 8 Ca (2+) with a low affinity and an EF-hand loop that binds a Ca (2+) ion with a high affinity.
- References & Citations
- 1. Gilmour, D. T., Lyon, G. J., Carlton, M. B. L., Sanes, J. R., Cunningham, J. M., Anderson, J. R., Hogan, B. L. M., Evans, M. J., Colledge, W. H.Mice deficient for the secreted glycoprotein SPARC/osteonectin/BM40 develop normally but show severe age-onset cataract formation and disruption of the lens.EMBO J. 17: 1860-1870, 1998. 2. Goldblum, S. E., Ding, X., Funk, S. E., Sage, E. H.SPARC (secreted protein acidic and rich in cysteine) regulates endothelial cell shape and barrier function.Proc. Nat. Acad. Sci. 91: 3448-3452, 1994. 3. Minn, A. J., Gupta, G. P., Siegel, P. M., Bos, P. D., Shu, W., Giri, D. D., Viale, A., Olshen, A. B., Gerald, W. L., Massague, J.Genes that mediate breast cancer metastasis to lung.Nature 436: 518-524, 2005.
- Storage Conditions
- Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.
- Calculated Molecular Weight
- 34632 MW
- Observed Molecular Weight
- 35 kDa
- Specificity
- No cross reactivity with other proteins.
- Gene Name Synonym
- SPARC
- Subcellular Location
- Secreted, extracellular space, extracellular matrix, basement membrane . In or around the basement membrane.
- Sequence Similarities
- Belongs to the SPARC family.
- Protein Name
- SPARC
- Isotype
- Rabbit IgG
- Contents
- Each vial contains 5mg BSA, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg NaN3.