Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<0.01 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its ability to inhibit BAFF-mediated proliferation of anti-IgM stimulated mouse B cells. Moore, P.A. et al. (1999) Science 285:260; Gross, J.A. et al. (2000) Nature 404:995; Schneider, P. et al. (1999) J. Exp. Med. 189:1747. The ED 50 for this effect is 20-80 ng/mL in the presence of 5 ng/mL recombinant human BAFF.
Source
Mouse myeloma cell line, NS0-derived
Human BAFF R
(Ser7-Ala71)
Accession # Q96RJ3DIEGRMD Human IgG1
(Pro100-Lys330)N-terminus C-terminus Accession #
N-terminal Sequence
AnalysisStarts at Ser7
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
33 kDa (monomer)
SDS-PAGE
40-50 kDa, reducing conditions
1162-BR |
| |
Formulation Lyophilized from a 0.2 μm filtered solution in PBS. | ||
Reconstitution Reconstitute at 100 μg/mL in sterile PBS. | ||
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.
|
Background: BAFF R/TNFRSF13C
B-cell activating factor (BAFF), also known as BlyS, TALL-1, TNAK, and zTNF4, is a TNF ligand superfamily member and has been designated TNFSF13B. Produced by macrophages, dendritic cells, and T lymphocytes, BAFF promotes the survival of B cells and is essential for B cell maturation (1-4). BAFF binds to three TNF receptor superfamily members: B-cell maturation antigen (BCMA/TNFRSF17), transmembrane activator and calcium-modulator and cyclophilin ligand interactor (TACI/TNFRSF13B) and BAFF receptor (BAFF R/BR3/TNFRSF13C). These receptors are type III transmembrane proteins that lack a signal peptide. Whereas TACI and BCMA bind BAFF and another TNF superfamily ligand, APRIL (a proliferation-inducing ligand), BAFF R selectively binds BAFF. The BAFF R extracellular domain lacks the TNF receptor canonical cysteine-rich domain (CRD) and contains only a partial CRD with four cysteine residues. Human and mouse BAFF R share 56% aa sequence identity. BAFF R is highly expressed in spleen, lymph node and resting B cells. It is also expressed at lower levels in activated B cell, in resting CD4+ T cells, in thymus and peripheral blood leukocytes. BAFF knockout mice lack mature B cells. Similarly, A/WySnJ mice that are defective in BAFF-R intracellular signaling also lack mature B cells, suggesting that BAFF R is the critical receptor for BAFF during B lymphopoiesis. In contrast, BCMA- or TACI-deficient mice have no major defect in B-cell development. While the function of BCMA is not defined, TACI has been shown to control B-cell homeostasis and T-cell-independent immune responses.
References:
Rolink, A.G. and F. Melcher (2002) Curr. Opin. Immunol. 14:266.
Mackay F. and J.L. Browning (2002) Nature Reviews Immunology 2:464.
Laabi, Y. et al. (2001) Current Biol. 11:R1013.
Thompson, J.S. et al. (2001) Science 14:2108.
Long Name:
B cell Activating Factor Receptor
Entrez Gene IDs:
115650 (Human); 72049 (Mouse)
Alternate Names:
BAFF R; BAFFR; BR3; CD268; TNFRSF13C
