Human R-Spondin 1 Antibody

Catalog #: AF4645
1 Citation Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
AF4645
AF4645-SP

All R-Spondin 1 Antibodies

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Citations (1)

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Summary Preparation and Storage Reconstitution Calculator Background Product Datasheets Related Research Areas

Human R-Spondin 1 Antibody Summary

Species Reactivity

Human

Specificity

Detects human R-Spondin 1 in direct ELISAs. In direct ELISAs, approximately 6% cross-reactivity with recombinant mouse R-Spondin 1 is observed and less than 1% cross-reactivity with recombinant human (rh) R-Spondin 2, rhR-Spondin 3, and rhR-Spondin 4 is observed.

Source

Polyclonal Sheep IgG

Purification

Antigen Affinity-purified

Immunogen

Chinese hamster ovary cell line CHO-derived human R-Spondin 1
Arg31-Ala263
Accession # Q2MKA7

Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Endotoxin Level

<0.10 EU per 1 μg of the antibody by the LAL method.

Label

Unconjugated

Applications

Recommended Concentration

Sample

Neutralization

Measured by its ability to neutralize R‑Spondin 1-induced activation of beta ‑Catenin response in the HEK293T human embryonic kidney cell line in a Topflash Luciferase assay. The Neutralization Dose (ND₅₀) is typically 3-12 µg/mL in the presence of 100 ng/mL Recombinant Human R‑Spondin 1 and 5 ng/mL Recombinant Mouse Wnt‑3a.

Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Sterile PBS to a final concentration of 0.2 mg/mL.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & 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.
6 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: R-Spondin 1

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 shares ~40% amino acid (aa) identity with three otherR-Spondin family members (1, 2). All R-Spondins 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 (aa 34‑135) with one potential N‑glycosylation site, 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). Potential isoforms of 200 and 236 aa have an alternate, shorter N‑terminus or are missing aa 146‑208, respectively (6). Over aa 21‑263, human R-Spondin 1 shares 89%, 87%, 92%, 91%, 91% and 89% aa identity with mouse, rat, equine, canine, caprine and bovine R-Spondin 1, respectively. 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 (7, 8). Disruption is also associated with palmoplantar keratosis (7, 8). Postnatally, R-Spondin 1 is expressed by neuroendocrine cells in the intestine, adrenal gland and pancreas, and by epithelia in kidney and prostate (9). Injection of recombinant R-Spondin 1 in mice causes activation of beta -catenin and proliferation of intestinal crypt epithelial cells, and ameliorates experimental colitis (9, 10). R-Spondin 1 regulates Wnt/ beta -catenin by competing with the Wnt antagonist DKK-1 for binding to the Wnt co-receptors, Kremen and LRP-6, reducing their DKK-1-mediated internalization (11). Reports differ on whether R-Spondin 1 binds LRP-6 directly (11‑13).

References

Chen, J-Z. et al. (2002) Mol. Biol. Rep. 29:287.
Kim, K.-A. et al. (2006) Cell Cycle 5:23.
Nam, J.-S. et al. (2007) Gene Expr. Patterns 7:306.
Kazanskaya, O. et al. (2004) Dev. Cell 7:525.
Kamata, T. et al. (2004) Biochim. Biophys. Acta 1676:51.
Entrez accession # EAX07331, ABA54598.
Tomaselli, S. et al. (2008) Hum. Mutat. 29:220.
Parma, P. et al. (2006) Nat. Genet. 38:1304.
Kim, K.-A. et al. (2005) Science 309:1256.
Zhao, J. et al. (2007) Gastroenterology 132:1331.
Binnerts, M.E. et al. (2007) Proc. Natl. Acad. Sci. USA 104:14700.
Nam, J.-S. et al. (2006) J. Biol. Chem. 281:13247.
Wei, Q. et al. (2007) J. Biol. Chem. 282:15903.

Long Name

Roof Plate-specific Spondin 1

Entrez Gene IDs

284654 (Human); 192199 (Mouse); 102122369 (Cynomolgus Monkey)

Alternate Names

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

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COA

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Related Research Areas

Citation for Human R-Spondin 1 Antibody

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

R-Spondin1/LGR5 Activates TGF? Signaling and Suppresses Colon Cancer Metastasis
Authors: X Zhou, L Geng, D Wang, H Yi, G Talmon, J Wang
Cancer Res., 2017-09-22;0(0):.
Species: Human
Sample Types: Whole Cells
Applications: Neutralization