Active Recombinant Human RSPO1 Protein, Biotinylated

• Cat.No.: RSPO1-169H
• Product Overview: Recombinant Human RSPO1(Arg31-Ala263) was expressed in CHO, Biotinylated.

Specification

• Description: R-Spondin 1 (RSPO1), also known as Cristin 3, is a 27 kDa secreted protein in the R-Spondin family of Wnt/ beta -catenin signaling regulators. These proteins contain two adjacent cysteine-rich furin-like domains followed by a thrombospondin (TSP-1) motif and a region rich in basic residues. Mature human R-Spondin 1 shares 87% amino acid sequence identity with mouse and rat R-Spondin 1. Alternative splicing generates additional isoforms that have a substituted N-terminus or lack the TSP-1 domain. R-Spondin 1 enhances canonical Wnt/ beta -catenin signaling by competing with the Wnt antagonist Dkk-1, binding to Frizzled-8, Kremen, LRP-6, Lgr4, Lgr5, and Lgr6, and enhancing cell surface availability of Wnt receptors. R-Spondin 1 functions in dorsal neural tube development as well as male and female germ cell development. It also induces bone formation, intestinal crypt cell proliferation, angiogenesis, and insulin secretion from pancreatic beta cells.
• Source: CHO
• Species: Human
• Predicted N Terminal: Arg31
• Form: Lyophilized from a 0.2 μm filtered solution in PBS and NaCl with BSA as a carrier protein.
• Bio-activity: Measured by its ability to induce Topflash reporter activity in HEK293T human embryonic kidney cells. The ED50 for this effect is typically 5-30 ng/mL in the presence of 5 ng/mL recombinant mouse Wnt-3a.
• Molecular Mass: Predicted Molecular Mass: 26 kDa (unlabeled)
• Protein length: Arg31-Ala263
• Endotoxin: <0.10 EU per 1 μg of the protein by the LAL method.
• Purity: >90%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
• Notes: Structure / Form: Biotinylated protein via sugars
• Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  12 months from date of receipt, -20 to -70 centigrade as supplied.
  1 month, 2 to 8 centigrade under sterile conditions after reconstitution.
  3 months, -20 to -70 centigrade under sterile
• Reconstitution: Reconstitute at 100 μg/mL in PBS containing at least 0.1% human or bovine serum albumin.

Gene Information

• Gene Name: RSPO1 R-spondin 1 [ Homo sapiens ]
• Official Symbol: RSPO1
• Synonyms: RSPO1; R-spondin 1; R spondin homolog (Xenopus laevis); R-spondin-1; FLJ40906; RSPONDIN; R-spondin homolog; roof plate-specific spondin-1; RSPO; CRISTIN3; RP11-566C13.1
• Gene ID: 284654
• mRNA Refseq: NM_001038633
• Protein Refseq: NP_001033722
• MIM: 609595
• UniProt ID: Q2MKA7

Reviews

03/13/2022

Remarkable changes in cell behavior were attributed to the potent effects of the product.

01/16/2018

The product's respected reputation in the scientific community was a testament to its quality and effectiveness.

09/25/2016

Dependable protein-protein interaction outcomes were achieved due to the product's pure composition.

Q&As

What distinguishes RSPO1 from other RSPO molecules, particularly in terms of its potential therapeutic use in Regenerative Medicine?

RSPO1 stands out for its potential therapeutic use in Regenerative Medicine due to its mitogenic activity in stem cells.

What methods were employed to characterize the purified rhRSPO1, both structurally and biologically?

Characterization methods included Western blotting, mass spectrometry, and in vitro (C2C12 cells) and in vivo (BALB/c mice) biological activity assays, confirming structural integrity and biological efficacy.

What tissue-specific processes are regulated by RSPOs, and what are some examples of these processes?

RSPOs regulate various tissue-specific processes, including bone formation, skeletal muscle tissue development, proliferation of pancreatic β-cells, intestinal stem cells, and cancer progression.

Describe the purification strategy used to obtain rhRSPO1, including the chromatographic steps involved.

The purification strategy for rhRSPO1 involved two sequential chromatographic steps: heparin affinity chromatography followed by molecular exclusion chromatography.

How does RSPO1 induce the Wnt pathway, and what are the downstream effects on cell proliferation, differentiation, and death?

RSPO1 induces the Wnt pathway by stabilizing the Wnt receptor complex, leading to enhanced Wnt signaling and influencing cellular processes.

How was recombinant human RSPO1 (rhRSPO1) generated, and which cell line was used for this purpose?

rhRSPO1 was generated using the HEK293 cell line, and the coding sequence was synthesized and subcloned into a mammalian cell expression vector.

What is the main function of R-Spondin proteins, including RSPO1, in cellular processes?

R-Spondin proteins, including RSPO1, play crucial roles in cell proliferation, differentiation, and death by inducing the Wnt pathway.