Recombinant Proteins iso9001 ISO13485
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Human R-Spondin 1 / RSPO1 (21-146) Protein, His Tag

分子别名(Synonym)

RSPO1,CRISTIN3,FLJ40906,RP11-566C13.1,R-spondin-1

表达区间及表达系统(Source)

Human R-Spondin 1 (21-146), His Tag (RS6-H4220) is expressed from human 293 cells (HEK293). It contains AA Ser 21 - Ala 146 (Accession # AAI14967).

Predicted N-terminus: Ser 21

蛋白结构(Molecular Characterization)

Online(Ser 21 - Ala 146) AAI14967

This protein carries a polyhistidine tag at the C-terminus.

The protein has a calculated MW of 14.6 kDa. The protein migrates as 19-25 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

内毒素(Endotoxin)

Less than 1.0 EU per μg by the LAL method.

纯度(Purity)

>95% as determined by SDS-PAGE.

制剂(Formulation)

Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.

Contact us for customized product form or formulation.

重构方法(Reconstitution)

Please see Certificate of Analysis for specific instructions.

For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

存储(Storage)

For long term storage, the product should be stored at lyophilized state at -20°C or lower.

Please avoid repeated freeze-thaw cycles.

This product is stable after storage at:

  1. -20°C to -70°C for 12 months in lyophilized state;
  2. -70°C for 3 months under sterile conditions after reconstitution.
 

电泳(SDS-PAGE)

Human R-Spondin 1 (21-146), His Tag (Cat. No. RS6-H4220) SDS-PAGE gel

Human R-Spondin 1 (21-146), His Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.

 

活性(Bioactivity)-ELISA

Biotinylated Human ELISA

Immobilized Human R-Spondin 1 (21-146), His Tag (Cat. No. RS6-H4220) at 5 μg/mL (100 μL/well) can bind Human RNF43, Fc Tag (Cat. No. RN3-H5256) with a linear range of 0.01-0.156 μg/mL (QC tested).

Protocol

Biotinylated Human  ELISA

Immobilized Human R-Spondin 1 (21-146), His Tag (Cat. No. RS6-H4220) at 5 μg/mL (100 μL/well) can bind Human LRP-6 (20-630), Mouse IgG2a Fc Tag (Cat. No. LR6-H5253) with a linear range of 0.039-2.5 μg/mL (Routinely tested).

Protocol

背景(Background)

R-spondin-1 is also known as Roof plate-specific Spondin 1 (RSPO1) and cysteinerich and single thrombospondin domain containing protein 3 (Cristin 3), is a secreted protein which belongs to the R-Spondin family and encodes a secreted activator protein with two cystein-rich, furin-like domains and one thrombospondin type 1 domain. All Rspondins regulate Wnt/β-catenin signaling, but have distinct expression patterns. Like other R-Spondins, R-Spondin-1 contains two adjacent cysteinerich furinlike domains (aa 34-135) with one potential N-glycosylation site, followed by a thrombospondin (TSP1) motif (aa 147-207) and a region rich in basic residues (aa 211-263). Only the furinlike domains are needed for β-catenin stabilization. A putative nuclear localization signal at the C-terminus may allow some expression in the nucleus. Potential isoforms of 200 and 236 aa have an alternate, shorter N-terminus or are missing aa 146-208, respectively. R-Spondin-1 is expressed in early development at the roof plate boundary and is thought to contribute to dorsal neural tube development. Human RSPO1 disruption results in a recessive syndrome characterized by XX sex reversal, palmoplantar hyperkeratosis and predisposition to squamous cell carcinoma of the skin. It has been shown that the complete female-to-male sex reversal is due to the absence of the testis-determining gene, SRY. R-Spondin-1 regulates Wnt/β-catenin by competing with the Wnt antagonist DKK1 for binding to the Wnt co receptors, Kremen and LRP6, reducing their DKK1 mediated internalization. Reports differ on whether R-spondin 1 binds LRP6 directly.

 

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