Product Details

Purity

Greater than 95% as determined by SDS-PAGE.

Endotoxin

Less than 1.0 EU/ug as determined by LAL method.

Activity

Measured by its binding ability in a functional ELISA. Immobilized Human RSPO1 at 2 μg/mL can bind Human LGR5(CSB-MP012906HU1), the EC₅₀ is 124.0-174.1 ng/mL.

Target Names

RSPO1

Uniprot No.

Q2MKA7

Alternative Names

(Roof plate-specific spondin-1) (hRspo1)

Molecular Characterization

Species

Homo sapiens (Human)

Source

Mammalian cell

Expression Region

31-263aa

Target Protein Sequence

RISAEGSQACAKGCELCSEVNGCLKCSPKLFILLERNDIRQVGVCLPSCPPGYFDARNPDMNKCIKCKIEHCEACFSHNFCTKCKEGLYLHKGRCYPACPEGSSAANGTMECSSPAQCEMSEWSPWGPCSKKQQLCGFRRGSEERTRRVLHAPVGDHAACSDTKETRRCTVRRVPCPEGQKRRKGGQGRRENANRNLARKESKEAGAGSRRRKGQQQQQQQGTVGPLTSAGPA

Mol. Weight

30.2 kDa

Protein Length

Partial

Tag Info

C-terminal 10xHis-Avi-tagged

Form

Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.

Buffer

Lyophilized from a 0.2 μm filtered PBS, 6% Trehalose, pH 7.4

Reconstitution

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.

Troubleshooting and FAQs

Protein FAQs

Storage Condition

Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.

Shelf Life

The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.

Lead Time

3-7 business days

Notes

Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Datasheet & COA

Please contact us to get it.

Description

R-spondin-1 is a critical potentiator of Wnt/β-catenin signaling that drives stem cell self-renewal and tissue homeostasis, making validated receptor-binding activity essential for meaningful experimental results. This recombinant human RSPO1 (aa 31–263) demonstrates confirmed binding to its cognate receptor LGR5 with an EC₅₀ of 124.0–174.1 ng/mL in functional ELISA, providing a suitable basis for receptor-ligand binding and competition assays, as well as serving as a reliable ELISA standard for antibody characterization studies. Mammalian cell expression preserves native glycosylation patterns important for proper folding and receptor engagement, supporting use in intestinal organoid culture, stem cell self-renewal assays, and Wnt pathway-dependent proliferation studies. The C-terminal 10×His-Avi tag facilitates oriented immobilization for SPR-based kinetic measurements, while purity exceeding 95% and endotoxin levels below 1.0 EU/μg satisfy the criteria typically required for cell-based differentiation assays and in vivo regenerative biology models.

Target Background

Function

Activator of the canonical Wnt signaling pathway by acting as a ligand for LGR4-6 receptors. Upon binding to LGR4-6 (LGR4, LGR5 or LGR6), LGR4-6 associate with phosphorylated LRP6 and frizzled receptors that are activated by extracellular Wnt receptors, triggering the canonical Wnt signaling pathway to increase expression of target genes. Also regulates the canonical Wnt/beta-catenin-dependent pathway and non-canonical Wnt signaling by acting as an inhibitor of ZNRF3, an important regulator of the Wnt signaling pathway. Acts as a ligand for frizzled FZD8 and LRP6. May negatively regulate the TGF-beta pathway. Has a essential roles in ovary determination. Regulates Wnt signaling by antagonizing DKK1/KREM1-mediated internalization of LRP6 through an interaction with KREM1.

Gene References into Functions

first report of a RSPO1 missense mutation in association with human disease (familial 46,XX disorder of sexual development) . PMID: 29262419
Rspo1 increases the number of Lgr5(+) liver stem cells in human liver fibrosis tissues, and once they are isolated, these cells are able to form organoids, and treatment with HGF/Rspo1 promotes their expansion PMID: 29079780
RSPOs facilitate HSC activation and promote liver fibrogenesis by enhancing the Wnt pathway PMID: 27572318
Role of RSPO1 in gastric cancer PMID: 28219935
Results showed that Rspo1 expression is downregulated in adult follicles but its activation is sufficient in promoting ovarian tumors supporting its direct involvement in the initiation of ovarian cancers. PMID: 27270435
We highlight the cooperation of WNT4, RSPO1 and FOXL2 within a regulatory network and the need for further research to better understand their role in defining and maintaining ovarian identity. PMID: 27604691
Rspo1 glycosylation at Asn137 is essential for secretion and stability but not for heparin binding. PMID: 27314333
DPY19L3-mediated C-mannosylation of Rspo1 at tryptophan(156) is required for Rspo1 secretion. PMID: 26764097
Genetic variants in ZC3H11B, RSPO1, and GJD2 are associated with susceptibility to the development of high myopia in a Han Chinese population. PMID: 26485405
R-Spondin1 has an effect on radiosensitivity of glioma cells PMID: 25865226
ZNRF3 and LGR4-binding sites in RSPO1 are required for Wnt signaling. PMID: 24165923
Changes in the expression levels of IRS1, IRS2, RIPK2, RSPO1, and DNA JC15 genes might contribute to the development of insulin resistance and glucose intolerance in the obese boys. PMID: 26040030
the LGR4-Rspo1 complex crystal structure shows divergent mechanisms of ligand recognition by leucine-rich repeat G-protein-coupled receptors PMID: 25480784
ZNRF3 binds RSPO1 and LGR5-RSPO1 with micromolar affinity via RSPO1 furin-like 1 (Fu1) domain. PMID: 24349440
overexpressed in fibrotic liver tissue PMID: 25218283
Loss of RSPO1 expression is associated with invasive ductal carcinoma of the breast. PMID: 24373193
RSPO-LGR4 not only induces the clearance of RNF43/ZNRF3 to increase Wnt receptor levels but also recruits IQGAP1 into the Wnt signaling complex. PMID: 24639526
Crystal structures of the Lgr4 ectodomain alone and bound to Rspo1. PMID: 23891289
In conclusion, present study highlights the role of Rspo 1 in bone remodeling where it activates Wnt signaling to induce differentiation, as shown in human as well murine in vitro osteoblast cell models. PMID: 23617070
Recent developments have demonstrated that ovarian development is an active process (rather than a default process); ovarian development/function requires expression of RSPO1, WNT4, and FOXL2. [REVIEW] PMID: 23044875
R-Spondin potentiates Wnt/beta-catenin signaling through orphan receptors LGR4 and LGR5 PMID: 22815884
study provides new mechanistic insights into the regulation of Wnt receptor turnover, and reveals ZNRF3 as a tractable target for therapeutic exploration PMID: 22575959
R-spondin1 is upregulated during critical stages of early human ovary development and may function as a tissue-specific amplifier of beta-catenin signaling to oppose testis determination. PMID: 21297984
identified a gene, R-spondin1, with potent and specific proliferative effects on intestinal crypt cells PMID: 16109882
Human R-spondin1 (RSPO1) is the gene disrupted in a recessive syndrome characterized by XX sex reversal, palmoplantar hyperkeratosis and predisposition to squamous cell carcinoma of the skin. PMID: 17041600
RSPO1 regulates Wnt signaling by inhibiting internalization of LRP6. PMID: 17804805
Mutational analysis of the RSPO1 gene in a 46,XX woman with true hermaphroditism, palmoplantar keratoderma, congenital bilateral corneal opacities, onychodystrophy, and hearing impairment, is reported. PMID: 18085567
R-sponin1 (Rspo1) acted synergistically with Wnt3A to activate Wnt/beta-catenin signaling in the uncommitted mesenchymal C2C12 cells. PMID: 18242177
SRY represses the transcriptional of the Rspo1/Wnt target genes involved in ovarian determination. PMID: 19376480
Mice treated with R-spondin1 showed increased intestinal epithelial healing, providing a protective effect against chemotherapy-induced intestinal mucositis. PMID: 16306530

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Involvement in disease

Keratoderma, palmoplantar, with squamous cell carcinoma of skin and sex reversal (PKKSCC)

Subcellular Location

Secreted. Nucleus.

Protein Families

R-spondin family

Tissue Specificity

Abundantly expressed in adrenal glands, ovary, testis, thyroid and trachea but not in bone marrow, spinal cord, stomach, leukocytes colon, small intestine, prostate, thymus and spleen.

Database Links

HGNC: 21679

OMIM: 609595

KEGG: hsa:284654

STRING: 9606.ENSP00000348944

UniGene: Hs.135015

Code	CSB-MP644834HU1
Abbreviation	Recombinant Human RSPO1 protein, partial (Active)
MSDS	MSDS Datasheet
Size	$156
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Image	(Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel. Activity Measured by its binding ability in a functional ELISA. Immobilized Human RSPO1 at 2 μg/ml can bind Human LGR5(CSB-MP012906HU1), the EC₅₀ is 124.0-174.1 ng/mL. Biological Activity Assay
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Recombinant Human R-spondin-1 (RSPO1), partial (Active)

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