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Human CRTAM Protein (His Tag)

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Human CRTAM Protein Product Information
Protein Construction:A DNA sequence encoding the human CRTAM (NP_062550.2) extracellular domain (Met 1-Ser 286) was expressed, with a polyhistidine tag at the C-terminus.
Expressed Host:Human Cells
Shipping:In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Human CRTAM Protein QC Testing
Purity:> 94 % as determined by SDS-PAGE
Bio-Activity:Measured by its binding ability in a functional ELISA . Immobilized human CADM1 at 2 μg/ml (100 μl/well) can bind biotinylated human CRTAM with a linear range of 12.5-400 ng/ml.
Endotoxin:< 1.0 EU per μg of the protein as determined by the LAL method
Stability:Samples are stable for up to twelve months from date of receipt at -70℃
Predicted N Terminal:Ser 18
Molecule Mass:The recombinant human CRTAM consists of 280 amino acids and predictes a molecular mass of 31.4 kDa. In SDS-PAGE under reducing conditions, the apparent molecular mass of rhCRTAM is approximately 50-60 kDa due to glycosylation.
Formulation:Lyophilized from sterile PBS, pH 7.4
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Human CRTAM Protein Usage Guide
Storage:Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution:A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
Human CRTAM Protein SDS-PAGE
Human CRTAM Protein (His Tag) SDS-PAGE
Other CRTAM Recombinant Protein Products
CRTAM Background

Cytotoxic and regulatory T-cell molecule, also known as Class-I MHC-restricted T-cell-associated molecule and CRTAM, is a single-pass type I  membrane protein which belongs to the nectin family. CRTAM contains one Ig-like C2-type (immunoglobulin-like) domain and one Ig-like V-type (immunoglobulin-like) domain. In the immune system, the expression of CRTAM is restricted to activated class-I MHC-restricted cells, including NKT and CD8 cells. It is strongly expressed in spleen, thymus, small intestine, peripheral blood leukocyte, and in purkinje neurons in cerebellum. It is expressed at much lower levels in testis, ovary, colon, lung and lymphoid tissues. CRTAM is a member of the immunoglobulin superfamily that complies with the structural characteristics of the JAM family of proteins and is phylogenetically more closely related to nectin-like proteins. It is a molecule involved in epithelial cell adhesion. CRTAM is sensitive to intermediate filament disruption and treatment of monolayers with soluble CRTAM enhances cell-cell dissociation and lowers transepithelial electrical resistance. CRTAM may also induce retention by binding to CD8+ dendritic cells (DCs) at the late stage of activation before proliferation. 

Human CRTAM References
  • Garay, E. et al., 2010, J Cell Biochem. 111 (1):111-22.
  • Medina-C.O. et al., 2010, Dev Comp Immunol. 34 (2):196-202.
  • Takeuchi, A. et al., 2009, J Immunol.183 (7):4220-8.
  • Valle-Rios,R. et al., 2009, Mol Immunol. 46 (16): 3379-87.
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    Catalog: 11975-H08H-50
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    All information of our products is subject to change without notice. Please refer to COA enclosed in shipped package for the newest information.