Skip to main content

Recombinant Mouse IGSF4A/SynCAM1 Protein, CF

Catalog # 1459-S4 | R&D Systems, Inc. a Bio-Techne Brand
Catalog #
Size / Price

Key Product Details



Accession #




Binding Activity

Product Specifications


Mouse myeloma cell line, NS0-derived mouse IGSF4A/SynCAM1 protein
Ile42-Asp376, with a C-terminal 10-His tag


>90%, by SDS-PAGE under reducing conditions and visualized by silver stain.

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

N-terminal Sequence Analysis


Predicted Molecular Mass

38.8 kDa


76-87 kDa, reducing conditions


Measured by its binding activity in a functional ELISA. Galiberet, L. et al. (2005) J. Biol. Chem. 280:21955.
Immobilized Recombinant Mouse CRTAM Fc Chimera (Catalog # 3687-CR) at 2 µg/mL (100 µL/well) can bind Recombinant Mouse IGSF4A/SynCAM1 with a linear range of 0.2-10 µg/mL.

Formulation, Preparation and Storage

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitute at 100 μg/mL in sterile PBS.

Reconstitution Buffer Available:
Size / Price
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.

Background: IGSF4A/SynCAM1

IGSF4A is a 75 kDa immunoglobulin superfamily protein that mediates calcium-independent adhesive interactions, either homophilic or heterophilic with CRTAM (class I-restricted T cell-associated molecule), Necl-1 (SynCAM3) or Nectin-3 (1 - 4). Alternate names for IGSF4A reflect its activities. As TSLC-1 (tumor suppressor in lung cancer-1), it is downregulated in non-small cell lung cancer (5). This may allow evasion of antitumor responses, since TSLC-1 interaction with CRTAM on activated NK and CD8+ T cells stimulates cytotoxicity and upregulates IFN-gamma production (3, 6). As Necl-2 (nectin-like 2), it is expressed on T zone-restricted BDCA3+ dendritic cells, again interacting with CRTAM (3). As SynCAM-1 (synaptic cell adhesion molecule-1) it binds homotypically across synaptic clefts and, like neuroligin/neurexin adhesion pairs, promotes formation of neural cell synapses (7, 8). Expression on mast cells allows attachment to neurites and fibroblasts (9, 10). As SgIGSF (spermatogenic IgSF), expression on developing sperm allows adhesion to an unknown partner on Sertoli cells that is critical for normal development (11, 12). Mouse IGSF4A cDNA encodes 445 amino acids including a signal peptide, three Ig-like domains (a V-type, a divergent C1-type and an I-type), a transmembrane domain and a cytoplasmic domain with protein 4.1 and PDZ domain binding sites. These sites allow connections to adaptor molecules and are critical in synaptogenesis (7, 8). The outer Ig-like domain most likely mediates adhesion, with altered affinity for splice variants that have either shorter spacing of this domain from the plasma membrane or varied glycosylation (1, 6). The six reported splice variants include a prominently expressed soluble form of about 45 kDa that inhibits adhesion (13). Mouse IGSF4A ECD shares 99%, 96%, 98% and 88% amino acid identity with rat, human, canine, and bovine IGSF4A, respectively.


  1. Biederer, T. et al. (2006) Genomics 87:139.
  2. Wakayama, T. et al. (2001) Mol. Reprod. Dev. 60:158.
  3. Galibert, L. et al. (2005) J. Biol. Chem. 280:21955.
  4. Shingai, T. et al. (2003) J. Biol. Chem. 278:35421.
  5. Kuramochi, M. et al. (2002) Nat. Genet. 27:427.
  6. Boles, K.S. et al. (2005) Blood 106:779.
  7. Biederer, T. et al. (2002) Science 297:1525.
  8. Sara, Y. et al. (2005) J. Neurosci. 25:260.
  9. Furuno, T. et al. (2005) J. Immunol. 174:6934.
  10. Ito, A. et al. (2003) Blood 101:2601.
  11. Wakayama, T. et al. (2001) Mol. Reprod. Dev. 60:158.
  12. Fujita, E. et al. (2006) Mol. Cell. Biol. 26:718.
  13. Koma, Y. et al. (2004) Oncogene 23:5687.

Long Name

Immunoglobulin Superfamily, Member 4

Alternate Names

BL2, Cadm1, Necl-2, RA175, ST17, SynCAM1, TSLC1

Entrez Gene IDs

23705 (Human); 54725 (Mouse)

Gene Symbol



Product Documents for Recombinant Mouse IGSF4A/SynCAM1 Protein, CF

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Recombinant Mouse IGSF4A/SynCAM1 Protein, CF

For research use only

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

Setting the standard in quality research reagents