Human R-Spondin 1 Antibody

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  • 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 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
Product Datasheets

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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.
Preparation and Storage
  • Reconstitution
    Sterile PBS to a final concentration of 0.2 mg/mL.
    Reconstitution Buffer Available
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • 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:
    1. Chen, J-Z. et al. (2002) Mol. Biol. Rep. 29:287.
    2. Kim, K.-A. et al. (2006) Cell Cycle 5:23.
    3. Nam, J.-S. et al. (2007) Gene Expr. Patterns 7:306.
    4. Kazanskaya, O. et al. (2004) Dev. Cell 7:525.
    5. Kamata, T. et al. (2004) Biochim. Biophys. Acta 1676:51.
    6. Entrez accession # EAX07331, ABA54598.
    7. Tomaselli, S. et al. (2008) Hum. Mutat. 29:220.
    8. Parma, P. et al. (2006) Nat. Genet. 38:1304.
    9. Kim, K.-A. et al. (2005) Science 309:1256.
    10. Zhao, J. et al. (2007) Gastroenterology 132:1331.
    11. Binnerts, M.E. et al. (2007) Proc. Natl. Acad. Sci. USA 104:14700.
    12. Nam, J.-S. et al. (2006) J. Biol. Chem. 281:13247.
    13. Wei, Q. et al. (2007) J. Biol. Chem. 282:15903.
  • Long Name:
    Roof Plate-specific Spondin 1
  • Entrez Gene IDs:
    284654 (Human); 192199 (Mouse)
  • 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
Related Research Areas
Citations:

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 Citations: Showing 1 - 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;0(0):.
    Species: Human
    Sample Type: Whole Cells
    Application: Neut

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Isotype Controls
Description Application Cat# Citations Images  

Normal Sheep IgG Control

Ctrl 5-001-A 11
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Reconstitution Buffers
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Reconstitution Buffer 1 (PBS)

RB01
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Secondary Antibodies
Description Application Cat# Citations Images  

Sheep IgG HRP-conjugated Antibody

WB , Simple Western HAF016 17  
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Donkey Anti-Sheep IgG NorthernLights™ NL557-conjugated Antibody

Flow , IHC , ICC NL010 3
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Donkey Anti-Sheep IgG NorthernLights™ NL637-conjugated Antibody

Flow , IHC , ICC NL011 5
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Donkey Anti-Sheep IgG NorthernLights™ NL493-conjugated Antibody

Flow , IHC , ICC NL012 3
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Sheep IgG (H+L) PE-conjugated Antibody

Flow F0126  
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Sheep IgG (H+L) APC-conjugated Antibody

Flow F0127  
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Donkey Anti-Sheep IgG Biotinylated Antibody

WB BAF016 2
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Sheep IgG VisUCyte HRP Polymer Antibody

IHC VC006  
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Donkey Anti-Sheep IgG (H+L) PerCP-conjugated Antibody

Flow F0128
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