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Recombinant human CD40 /TNFRSF5 Protein, Fc Tag (HPLC verified), 1mg  

Recombinant human CD40 /TNFRSF5 Protein, Fc Tag (HPLC verified), 1mg

Recombinant Human CD40 / TNFRSF5 Protein, Glu 21 - Arg 193, produced in human 293 cells (HEK293), HPLC-verified, Fc Tag

Synonym
recombinant, human protein, CD40, CD-40, Bp50, Bp-50, CDW40, MGC9013, TNFRSF5, TNFRSF-5, p50, p-50

More details

CD0-H5253-1K

Availability: within 7 days

1 980,00 €

Background
CD40 is also known as TNFRSF5, Bp50, CDW40, MGC9013, TNFRSF5 and p50, is a member of the TNF receptor superfamily which are single transmembrane-spanning glycoproteins, and plays an essential role in mediating a broad variety of immune and inflammatory responses including T cell-dependent immunoglobulin class switching, memory B cell development, and germinal center formation. CD40 is a costimulatory protein found on antigen presenting cells and is required for their activation. The binding of CD154 (CD40L) on TH cells to CD40 activates antigen presenting cells and induces a variety of downstream effects. CD40 contains 4 cysteine-rich repeats in the extracellular domain, and is expressed in B cells, dendritic cells, macrophages, endothelial cells, and several tumor cell lines. The extracellular domain has the cysteinerich repeat regions, which are characteristic for many of the receptors of the TNF superfamily. Interaction of CD40 with its ligand, CD40L, leads to aggregation of CD40 molecules,which in turn interact with cytoplasmic components to initiate signaling pathways. Early studies on the CD40-CD40L system revealed its role in humoral immunity. Defects in CD40 result in hyper-IgM immunodeficiency type 3 (HIGM3), an autosomal recessive disorder characterized by an inability of B cells to undergo isotype switching, as well as an inability to mount an antibody-specific immune response, and a lack of germinal center formation.

Source
Recombinant human CD40 / TNFRSF5 Protein, Fc Tag (HPLC-verified) (Human CD40, Fc Tag (HPLC-verified)) Glu 21 - Arg 193 (Accession # NP_001241.1) was produced in human 293 cells (HEK293)

Molecular Characterization
rhCD40 Fc Chimera (HPLC-verified) is fused with Fc fragment of human IgG1 at the C-terminus, and has a calculated MW of 45.3 kDa. The predicted N-terminus is Glu 21. The reducing (R) protein migrates as 55-60 kDa in SDS-PAGE due to glycosylation.

Endotoxin
Less than 1.0 EU per μg of the Human CD40, Fc Tag (HPLC-verified) by the LAL method.

Purity
>95% as determined by SDS-PAGE.
>90% as determined by SEC-HPLC.

Formulation
Lyophilized from 0.22 μm filtered solution in 50 mM tris, 100 mM glycine, pH7.5. Normally Mannitol or Trehalose are added as protectants before lyophilization.
Contact us for customized product form or formulation.

Storage
Avoid repeated freeze-thaw cycles. No activity loss was observed after storage at:
In lyophilized state for 1 year (4°C-8°C); After reconstitution under sterile conditions for 1 month (4°C-8°C) or 3 months (-20°C to -70°C).

Bioactivity
Measured by its binding ability in a functional ELISA. Immobilized Human CD40 Ligand, His Tag at 5 μ g/mL (100 μL/well) can bind Human CD40, Fc Tag (Catalog # CD0-H5253) with a linear range of 0.039-1.25 μg/mL.

References

(1) Banchereau, J. et al., 1994, Annu. Rev. Immunol. 12: 881-922
(2) Ni, C.Z. et al., 2000, Proc. Natl. Acad. Sci. U.S.A. 97: 10395-10399
(3) Ferrari.S. et al., 2001, Proc. Natl. Acad. Sci. U.S.A. 98: 12614-12619
(4) Bhushan, A and Covey, L.R. 2001, Immunol. Res. 24: 311-324
(5) Armitage, R.J. et al. (1993) J. Immunol. 150:3671

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