Recombinant Human JAM-C Fc Chimera Protein, CF

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications Bioactivity
Format
Carrier-Free

Order Details

Recombinant Human JAM-C Fc Chimera Protein, CF Summary

Details of Functionality
Measured by its ability to inhibit the adhesion of J45.01 human acute lymphoblastic leukemia T lymphocytes on immobilized JAM-2 (VE-JAM)/Fc Chimera. When 0.2 µg/mL (100 µL/well) of rhJAM-B/Fc Chimera is immobilized on goat anti-human IgG Fc Chimera antibody coated wells, the ED50 for this effect is 0.1-0.5 µg/mL in the presence of 1 x 105 cells/well.
Source
Mouse myeloma cell line, NS0-derived human JAM-C protein
Human JAM-C
Val32 - Asn241 (Ala149Pro)
Accession # Q9BX67
IEGRMD Human IgG1
(Pro100 - Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Val32
Structure / Form
Disulfide-linked homodimer
Protein/Peptide Type
Recombinant Proteins
Gene
JAM3
Purity
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Theoretical MW
50 kDa (monomer).
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
60-65 kDa, reducing conditions
Publications
Read Publications using
1189-J3 in the following applications:

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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in Tris-Citrate and NaCl.
Purity
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
Reconstitution Instructions
Reconstitute at 100 μg/mL in sterile PBS.

Notes

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

Alternate Names for Recombinant Human JAM-C Fc Chimera Protein, CF

  • CD323
  • JAM-2
  • JAM3
  • JAMC
  • JAM-C
  • JAM-CFLJ14529
  • junctional adhesion molecule 3JAM-3
  • junctional adhesion molecule C

Background

The family of juctional adhesion molecules (JAM), comprising at least three members, are type I transmembrane receptors belonging to the immunoglobulin (Ig) superfamily (1, 2). These proteins are localized in the tight junctions between endothelial cells or epithelial cells. Some family members are also found on blood leukocytes and platelets. Human JAM-C cDNA predicts a 310 amino acid (aa) residue precursor protein with a putative 31 aa signal peptide, a 210 aa extracellular region containing two Ig domains, a 23 aa transmembrane domain and a 46 aa cytoplasmic domain containing a PDZ-binding motif and a PKC phosphorylation site (3, 4). Human JAM-C shares 86% aa sequence identity with its mouse homologue. It also shares approximately 36% and 32% aa sequence homology with human JAM-B and JAM-A, respectively (3 - 5). Human JAM-C shows widespread tissue expression and the highest levels are found in the placenta, brain, kidney and heart. JAM-C is expressed on endothelial cells of high endothelial venules in human tonsil. It is also expressed on platelets, T-cells and NK cells (3 - 5). Unlike other JAM family members, JAM-C forms only weak homotypic interactions. JAM-C binds to JAM-B to facilitate the interactions between JAM-B and the integrin alpha4beta1 (6). This heterotypic interaction between leukocyte JAM-C and endothelial JAM-B may play a role in regulating leukocyte transmigration (5). On platelets, JAM-C is a counter-receptor for the leukocyte integrin Mac-1(CD11b/CD18) (7). JAM-C has also been identified as a strong candidate gene for hypoplastic left heart syndrome (8).

The nomenclature used for the JAM family proteins is confusing. VE-JAM has been referred to in the literature variously as JAM-B or JAM-C. Until further clarification, R&D Systems has adopted the nomenclature where both mouse and human VE-JAM are referred to as JAM-B. Under this system, JAM-C refers to the protein encoded by the gene localized to human chromosome 11.

  1. Chavakis, T. et al. (2003) Thromb. Haemost. 89:13.
  2. Aurand-Lions, M. et al. (2001) Blood 98:3699.
  3. Arrate, M.P. et al. (2001) J. Biol. Chem. 276:45826.
  4. Liang, T. et al. (2002) J. Immunol. 168:1618.
  5. Johnson-Leger, C. et al. (2002) Blood 100:25793.
  6. Cunningham, A. et al. (2002) J Biol. Chem. 277:27589.
  7. Santoso, S. et al. (2002) J. Exp. Med. 196:679.
  8. Phillips, H.M. et al. (2002) Genomics 79:475.

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Publications for JAM-C (1189-J3)(3)

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Bioinformatics

Gene Symbol JAM3
Uniprot