Recombinant Mouse R-Spondin 1 (CHO-expressed) Protein

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Product Details

Summary
Reactivity MuSpecies Glossary
Applications Bioactivity

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Recombinant Mouse R-Spondin 1 (CHO-expressed) Protein Summary

Details of Functionality
Measured by its ability to induce Topflash reporter activity in HEK293T human embryonic kidney cells. The typical ED50 is 8-40 ng/mL in the presence of 5 ng/mL Recombinant Mouse Wnt‑3a (Catalog # 1324-WN).
Source
Chinese Hamster Ovary cell line, CHO-derived mouse R-Spondin 1 protein
Met1-Gln265
Accession #
N-terminal Sequence
Ser21
Protein/Peptide Type
Recombinant Proteins
Gene
Rspo1
Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Note
<0.01 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Theoretical MW
27 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
40-43 kDa, reducing conditions
Publications
Read Publications using
7150-RS in the following applications:

Packaging, Storage & Formulations

Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein. *1 mg pack size (01M) is supplied as a 0.2 µm filtered solution in PBS with BSA as a carrier protein.
Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Reconstitution Instructions
Reconstitute at 100 μg/mL in PBS containing at least 0.1% human or bovine serum albumin.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Mouse R-Spondin 1 (CHO-expressed) Protein

  • Cristin 3
  • CRISTIN3
  • FLJ40906Roof plate-specific spondin-1
  • hRspo1
  • roof plate-specific spondin
  • RSPO
  • RSPO1
  • RSpondin 1
  • R-Spondin 1
  • R-spondin homolog (Xenopus laevis)
  • RSPONDIN
  • R-spondin1
  • R-spondin-1

Background

R-Spondin 1 (RSPO1, Roof plate-specific Spondin 1), also known as cysteine-rich and single thrombospondin domain containing protein 3 (Cristin 3), is a 27 kDa secreted protein that belongs to the R-Spondin family (1, 2). R-Spondins share around 40% aa identity. All regulate Wnt/ beta ‑catenin signaling, but have distinct expression patterns (1‑3). Like other R-spondins, R-Spondin 1 contains two adjacent cysteine-rich furin-like domains (amino acids (aa) 34‑135) followed by a thrombospondin (TSP-1) motif (aa 147‑207) and a region rich in basic residues (aa 211‑263). Only the furin-like domains are needed for beta -catenin stabilization (2, 4). A putative nuclear localization signal at the C‑terminus may allow some expression in the nucleus (5). R‑Spondin 1 contains one potential N‑glycosylation site. Mouse R‑Spondin 1 shares 98%, 94%, 94%, 93%, 92% and 88% aa identity with rat, human, horse, cow, goat and dog RSPO-1, respectively, within aa 21‑209. R‑Spondin 1 is expressed in early development at the roof plate boundary and is thought to contribute to dorsal neural tube development (3, 5). In humans, rare disruptions of the R-Spondin 1 gene are associated with tendencies for XX sex reversal (phenotypic male) or hermaphroditism, indicating a role for R‑Spondin 1 in gender-specific differentiation (6, 7). Disruption is also associated with palmoplantar keratosis (6, 7). Postnatally, R-Spondin 1 is expressed by neuroendocrine cells in the intestine, adrenal gland and pancreas, and by epithelia in kidney and prostate (8). Injection of recombinant R‑Spondin 1 in mice causes activation of beta -catenin and proliferation of intestinal crypt epithelial cells, and ameliorates experimental colitis (8, 9). R‑Spondin 1 appears to regulate Wnt/ beta ‑catenin by competing with the Wnt antagonist DKK-1 for binding to the Wnt co‑receptor, Kremen (10). This competition reduces internalization of DKK‑1/LRP‑6/Kremen complexes (10). Reports differ on whether R-Spondin 1 binds LRP-6 directly (10‑12).
  1. Lowther, W. et al. (2005) J. Virol. 79:10093.
  2. Kim, K.-A. et al. (2006) Cell Cycle 5:23.
  3. Nam, J.-S. et al. (2007) Gene Expr. Patt. 7:306.
  4. Kazanskaya, O. et al. (2004) Dev. Cell 7:525.
  5. Kamata, T. et al. (2004) Biochim. Biophys. Acta 1676:51.
  6. Tomaselli, S. et al. (2007) Hum. Mutat. Dec 17 [Epub ahead of print]
  7. Parma, P. et al. (2006) Nat. Genet. 38:1304.
  8. Kim, K.-A. et al. (2005) Science 309:1256.
  9. Zhao, J. et al. (2007) Gastroenterology 132:1331.
  10. Binnerts, M.E. et al. (2007) Proc. Natl. Acad. Sci. USA 104:14700.
  11. Nam, J.-S. et al. (2006) J. Biol. Chem. 281:13247.
  12. Wei, Q. et al. (2007) J. Biol. Chem. 282:15903.

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Publications for R-Spondin 1 (7150-RS)(5)

We have publications tested in 2 confirmed species: Human, Mouse.

We have publications tested in 1 application: Bioassay.


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Bioinformatics

Gene Symbol Rspo1
Uniprot