COMP/Thrombospondin-5 Antibody [Unconjugated]

Images

 
Western blot shows lysates of human cartilage tissue. PVDF membrane was probed with 0.05 µg/mL of Goat Anti-Human COMP/Thrombospondin‑5 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3134) followed by ...read more
Recombinant Human COMP/Thrombospondin‑5 (Catalog # 3134-CP), immobilized onto a microplate, supports the adhesion of the ATDC5 mouse chondrogenic cell line in a dose-dependent manner (orange line). Adhesion elicited ...read more

Product Details

Summary
Reactivity HuSpecies Glossary
Applications WB, B/N
Clonality
Polyclonal
Host
Goat
Conjugate
Unconjugated
Concentration
LYOPH

Order Details

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Catalog# & Formulation Size Price

COMP/Thrombospondin-5 Antibody [Unconjugated] Summary

Immunogen
Mouse myeloma cell line NS0-derived recombinant human COMP/Thrombospondin-5
Gln21-Ala757 (Ala256Arg)
Accession # P49747
Specificity
Detects human COMP in direct ELISAs and Western blots. In Western blots, less than 1% cross-reactivity with recombinant human Thrombospondin-1, -2, -3 and -4 is observed.
Source
N/A
Isotype
IgG
Clonality
Polyclonal
Host
Goat
Gene
COMP
Endotoxin Note
<0.10 EU per 1 μg of the antibody by the LAL method.
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.

Applications/Dilutions

Dilutions
  • Western Blot 0.05 ug/mL
  • Neutralization 1-4 ug/mL

Packaging, Storage & Formulations

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.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
Preservative
No Preservative
Concentration
LYOPH
Reconstitution Instructions
Reconstitute at 0.2 mg/mL in sterile PBS.

Notes

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

Alternate Names for COMP/Thrombospondin-5 Antibody [Unconjugated]

  • cartilage oligomeric matrix protein (pseudoachondroplasia, epiphyseal dysplasia1, multiple)
  • cartilage oligomeric matrix protein
  • cartilage oligomeric matrix protein(pseudoachondroplasia, epiphyseal dysplasia1, multiple)
  • COMP
  • EDM1
  • EPD1
  • MED
  • MEDMGC131819
  • MGC149768
  • PSACH
  • pseudoachondroplasia (epiphyseal dysplasia 1, multiple)
  • THBS5
  • Thrombospondin5
  • Thrombospondin-5
  • TSP5

Background

Cartilage Oligomeric Matrix Protein (COMP), also known as Thrombospondin-5, is a 110 kDa multidomain calcium binding protein that associates with other extracellular matrix molecules. Thrombospondin-1 and -2 constitute subgroup A and form homotrimers, whereas Thrombospondin-3, -4, and COMP constitute subgroup B and form homopentamers (1-4). The human COMP cDNA encodes a 757 amino acid (aa) precursor that includes a 20 aa signal sequence followed by a non-collagenous
coiled‑coil domain, four EGF-like repeats, seven TSP type-3 repeats, and a globular TSP C-terminal domain (5). Human COMP shares 86-93% aa sequence identity with rat, mouse, equine, bovine, and canine COMP. Within the TSP type-3 repeats and TSP C-terminal domain, human COMP shares 60%, 61%, 74%, and 80% aa sequence identity with human Thrombospondin-1, -2, -3, and -4, respectively. The coiled coil domain mediates the association of COMP into disulfide-linked homopentamers with a central hub and peripheral globular domains connected by flexible strands (6, 7). An axial pore is formed by the coiled coil assembly and binds vitamin D3 which is involved in bone and cartilage metabolism (8). An RGD sequence in the third TSP type-3 repeat mediates chondrocyte attachment via Integrin alpha 5 beta 1, although when reduced and in the absence of calcium, attachment is mediated via Integrin alpha V beta 3 (9). COMP is upregulated in rheumatoid arthritis and osteoarthritis, hepatocellular carcinomas, chronic pancreatitis, and pancreatic carcinomas (10-12). Elevated circulating COMP levels are used as a biomarker for early onset of some skeletal disorders (10). Several mutations are associated with skeletal dysplasias, and the most common, a point mutation in the third TSP type-3 repeat, results in diminished calcium binding ability (13, 14).

  1. Adams, J.C. and J. Lawler (2004) Int J. Biochem. Cell Biol. 36:961.
  2. Posey, K.L. et al. (2004) Int. J. Biochem. Cell Biol. 36:1005.
  3. Adams, J.C. (2004) Int. J. Biochem. Cell Biol. 36:1102.
  4. Mann, H.H. et al. (2004) J. Biol. Chem. 279:25294.
  5. Newton, G. et al. (1994) Genomics, 24:435.
  6. DiCesare, P. et al. (1995) J. Orthopaedic Res. 13:422.
  7. Efimov, V.P. et al. (1994) FEBS Lett. 341:54.
  8. Ozbek, S. et al. (2002) EMBO J. 21:5960.
  9. Chen, F.H. et al. (2005) J. Biol. Chem. 280:32655.
  10. Wislowska, M. and B. Jablonska (2005) Clin. Rheumatol. 24:278.
  11. Xiao, Y. et al. (2004) J. Gastroenterol. Hepatol. 19:296.
  12. Liao, Q. et al. (2003) Scand. J. Gastroenterol. 38:207.
  13. Kennedy, J. et al. (2005) Eur. J. Hum. Genet. 13:547.
  14. Hou, J. et al. (2000) Cell Calcium 27:309.

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.

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Product General Protocols

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Video Protocols

WB Video Protocol

FAQs for COMP/Thrombospondin-5 Antibody (AF3134). (Showing 1 - 1 of 1 FAQ).

  1. I have synovial fluid sample and I want to work on Western bloting can you support me,how can I prepare this sample for WB technique for assay comp(cartilage oligomatrix protein )?
    • We currently sell four antibodies to cartilage oligomeric matrix protein (COMP), all of which are validated for Western blotting. Although we have generated Western blot data using samples from human, bovine and rabbit cartilage, we do not have any testing data derived from synovial fluid samples. You may however find the following publication useful, in which the authors sampled synovial fluid from patients with rheumatoid arthritis and prepared this fluid for Western blot detection of the proteins SP-A and SP-D: PMC 2080374

Secondary Antibodies

 

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Bioinformatics Tool for COMP/Thrombospondin-5 Antibody (AF3134)

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Diseases for COMP/Thrombospondin-5 Antibody (AF3134)

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PTMs for COMP/Thrombospondin-5 Antibody (AF3134)

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Bioinformatics

Gene Symbol COMP
Uniprot