Recombinant Human sRANK Receptor protein

Background

RANK Ligand and RANK Receptor are members of the TNF superfamily that play an important role in the regulation of specific immunity and bone turnover. RANK Receptor was originally identified as a dendritic-cell-membrane protein, which by interacting with RANKL augments the ability of dendritic cells to stimulate na ve T cell proliferation and to promote the survival of RANK + T cells. RANK is also expressed in a variety of tissues including skeletal muscle, thymus, liver, colon, small intestine and adrenal gland. The RANK/RANKL interaction is important in the regulation of osteoclastogenesis and in dendritic-cell-mediated T cell immune responses. Impairments in RANK signaling have been implicated in the induction of expansile osteolysis and Paget disease of bone (PDB2). Recombinant human sRANK receptor is a 19.1 kDa polypeptide containing the TNFR homologous cysteine rich portion of the extracellular domain of RANK receptor (174 amino acid residues).

Expression system

Escherichia coli.

Purity

> 98 % by SDS-PAGE and HPLC analyses.

Molecular weight

Approximately 19.1 kDa, a single non-glycosylated polypeptide chain containing 174 amino acids.

Endotoxin

Less than 0.1 EU/μg of rHusRANK Receptor as determined by LAL method.

Form

Sterile Filtered White lyophilized (freeze-dried) powder. Formulation Lyophilized from a 0.2 μm filtered concentrated solution in 20 mM Tris-HCl, pH 8.0, 150mM NaCl.

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