Recombinant Human SPARC Protein, CF

Catalog # Availability Size / Price Qty
941-SP-050
Product Details
Citations (8)
FAQs
Supplemental Products
Reviews (2)

Recombinant Human SPARC Protein, CF Summary

Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its ability to inhibit the cell growth of Mv1Lu mink lung epithelial cells. Schiemann, B.J. et al. (2003) Mol. Biol. Cell. 14:3977. The ED50 for this effect is 0.75-3.0 µg/mL.
Source
Mouse myeloma cell line, NS0-derived human SPARC protein
Ala18-Ile303, with a C-terminal 10-His tag
Accession #
N-terminal Sequence
Analysis
Ala18
Predicted Molecular Mass
34 kDa
SDS-PAGE
40-50 kDa, reducing conditions

Product Datasheets

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

941-SP

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
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Reconstitution Calculator

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Background: SPARC

SPARC, an acronym for “secreted protein, acidic and rich in cysteine”, is also known as osteonectin or BM-40 (1-5). It is the founding member of a family of secreted matricellular proteins with similar domain structure. The 286 amino acid (aa), 43 kDa protein contains an N-terminal acidic region that binds calcium, a follistatin domain that contains Kazal-like sequences, and a C-terminal extracellular calcium (EC) binding domain with two EF-hand motifs (1-5). Crystal structure modeling shows that residues implicated in cell binding, inhibition of cell spreading, and disassembly of focal adhesions cluster on one face of SPARC, while a collagen binding epitope and an N-glycosylation site are opposite this face (6). SPARC is produced by fibroblasts, capillary endothelial cells, platelets and macrophages, especially in areas of tissue morphogenesis and remodeling (3, 7). SPARC shows context-specific effects, but generally inhibits adhesion, spreading and proliferation, and promotes collagen matrix formation (3-5). For endothelial cells, SPARC disrupts focal adhesions and binds and sequesters PDGF and VEGF (3-5). SPARC is abundantly expressed in bone, where it promotes osteoblast differentiation and inhibits adipogenesis (5, 8). SPARC is potentially cleaved by metalloproteinases, producing an angiogenic peptide that includes the copper-binding sequence KGHK (7). Paradoxically, SPARC is highly expressed in many tumor types undergoing an endothelial to mesenchymal transistion; its expression, however, mainly decreases the likelihood of metastasis and confers sensitivity to chemotherapy and radiation (4, 9-11). Stabilin-1, which is expressed on alternately activated macrophages, is the first SPARC receptor to be identified. It binds the SPARC EC domain and mediates endocytosis for degradation (12). Mature human SPARC shows 92%, 92%, 97%, 99%, 96% and 85% aa identity with mouse, rat, canine, bovine, porcine and chick SPARC, respectively.

References
  1. Lankat-Buttgereit, B. et al. (1988) FEBS Lett. 236:352.
  2. Sweetwyne, M. T. et al. (2004) J. Histochem. Cytochem. 52:723.
  3. Sage, H. et al. (1989) J. Cell Biol. 109:341.
  4. Framson, P. E. and E. H. Sage (2004) J. Cell. Biochem. 92:679.
  5. Alford, A. I. and K. D. Hankenson (2006) Bone 38:749.
  6. Hohenester, E et al. (1997) EMBO J. 16:3778.
  7. Sage, E. H. et al. (2003) J. Biol. Chem. 278:37849.
  8. Delany, A. M. et al. (2003) Endocrinology 144:2588.
  9. Robert, G. et al. (2006) Cancer Res. 66:7516.
  10. Koblinski, J. E. et al. (2005) Cancer Res. 65:7370.
  11. Tai, I. T. et al. (2005) J. Clin. Invest. 115:1492.
  12. Kzhyshkowska, J. et al. (2006) J. Immunol. 176:5825.
Long Name
Secreted Protein Acidic and Rich in Cysteine
Entrez Gene IDs
6678 (Human); 20692 (Mouse)
Alternate Names
Basement-membrane protein 40; BM-40; ONcysteine-rich protein; Osteonectin; Secreted protein acidic and rich in cysteine; secreted protein, acidic, cysteine-rich (osteonectin); SPARC

Citations for Recombinant Human SPARC Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

8 Citations: Showing 1 - 8
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  1. Secreted Protein Acidic and Rich in Cysteine (SPARC) Enhances Cell Proliferation, Migration, and Epithelial Mesenchymal Transition, and SPARC Expression is Associated with Tumor Grade in Head and Neck Cancer
    Authors: CH Chang, MC Yen, SH Liao, YL Hsu, CS Lai, KP Chang, YL Hsu
    Int J Mol Sci, 2017;18(7):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  2. Secreted Protein Acidic and Rich in Cysteine (SPARC) Enhances Cell Proliferation, Migration, and Epithelial Mesenchymal Transition, and SPARC Expression is Associated with Tumor Grade in Head and Neck Cancer.
    Authors: Chang C, Yen M, Liao S, Hsu Y, Lai C, Chang K, Hsu Y
    Int J Mol Sci, 2017;18(7):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  3. Secreted Protein Acidic and Rich in Cysteine (SPARC) Enhances Cell Proliferation, Migration, and Epithelial Mesenchymal Transition, and SPARC Expression is Associated with Tumor Grade in Head and Neck Cancer.
    Authors: Chih-Hau Chang, Meng-Chi Yen, Ssu-Hui Liao, Yu-Ling Hsu, Chung-Sheng Lai, Kao-Ping Chang, Ya-Ling Hsu
    International Journal of Molecular Sciences, 2017;0(0):1422-0067.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  4. SPARC expression by cerebral microvascular endothelial cells in vitro and its influence on blood-brain barrier properties
    J Neuroinflammation, 2016;13(1):225.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  5. Collagen signaling enhances tumor progression after anti-VEGF therapy in a murine model of pancreatic ductal adenocarcinoma.
    Authors: Aguilera K, Rivera L, Hur H, Carbon J, Toombs J, Goldstein C, Dellinger M, Castrillon D, Brekken R
    Cancer Res, 2014;74(4):1032-44.
    Species: Rat
    Sample Types: Protein
    Applications: ELISA Developmet
  6. SPARC expression in CML is associated to imatinib treatment and to inhibition of leukemia cell proliferation.
    Authors: Giallongo C, La Cava P, Tibullo D, Barbagallo I, Parrinello N, Cupri A, Stagno F, Consoli C, Chiarenza A, Palumbo G, Di Raimondo F
    BMC Cancer, 2013;13(0):60.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  7. SMOC1 is a tenascin-C interacting protein over-expressed in brain tumors.
    Authors: Brellier F, Ruggiero S, Zwolanek D, Martina E, Hess D, Brown-Luedi M, Hartmann U, Koch M, Merlo A, Lino M, Chiquet-Ehrismann R
    Matrix Biol., 2011;30(3):225-33.
    Species: Human
    Sample Types: Recombinant Protein
    Applications: Surface Plasmon Resonance
  8. Dynamic interaction networks in a hierarchically organized tissue.
    Authors: Kirouac DC, Ito C, Csaszar E, Roch A, Yu M, Sykes EA, Bader GD, Zandstra PW
    Mol. Syst. Biol., 2010;6(0):417.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay

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Reviews for Recombinant Human SPARC Protein, CF

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Recombinant Human SPARC Protein, CF
By Anonymous on 11/08/2019
Application: Immunoassay Standard

Used in an ELISA with MAB941 and AF941. The assay had good parallelism with human serum and plasma samples.


Recombinant Human SPARC Protein, CF
By Anonymous on 01/09/2018
Application: Binding assay/Protein-protein interaction

MAB941 binds human SPARC, MAB942 does not bind human SPARC.