Qk032 R-spondin 3 (human) Qkine protein vial

Human R-spondin 3 Qk032 protein purity SDS-PAGE lot #010

Recombinant human R-spondin 3 protein (Qk032)

Name: Recombinant human R-spondin 3 protein (Qk032)
SKU: Qk032
Availability: InStock

Human R-spondin 3 protein potentiates Wnt signalling in and has been shown to function in crypt regeneration in the intestine and control stem cell and progenitor cell behaviour during kidney development. R-spondin 3 is used alongside R-spondin 1 in intestinal organoid culture systems.

17kDa highly pure, bioactive domain of human R-spondin 3 comprising the two cysteine-rich furin-like domains, which are necessary and sufficient for Wnt signalling potentiation and are the essential domains for activity in stem cell and organoid culture. Animal-free and carrier-protein free.

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1mg will be despatched as 2 x 500µg

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Description

Summary

High purity bioactive domain of human R-spondin 3 protein (Uniprot: Q9BXY4)
>98%, by SDS-PAGE quantitative densitometry
17 kDa
Expressed in E. coli
Animal-free (AOF) and carrier protein-free.
Manufactured in our Cambridge, UK laboratories
Lyophilized from acetonitrile, TFA
Resuspend in 10mM HCl at >100 µg/ml, prepare single use aliquots, add carrier protein if desired and store frozen at -20°C or -80°C

handling and storage FAQ

Featured applications

Chemically defined media for organoid culture

Alternative protein names

R-spondin-3, RSPO3, RSPO-3, Protein with TSP type-1 repeat, PWTSR, Roof plate-specific spondin-3, Thrombospondin type-1 domain-containing protein 2, THSD2

Background references

1. de Lau, W. B. M., Snel, B. & Clevers, H. C. The R-spondin protein family. Genome biology 13, 242 (2012).
2. Sato, T. et al. Single Lgr5 stem cells build crypt-villus structures in vitro without a mesenchymal niche. Nature 459, 262–265 (2009).
3. VanDussen, K. L., Sonnek, N. M. & Stappenbeck, T. S. L-WRN conditioned medium for gastrointestinal epithelial stem cell culture shows replicable batch-to-batch activity levels across multiple research teams. Stem cell research 37, 101430 (2019).

Species reactivity

Human

Species similarity:
Bovine – 98%
Porcine – 98%
Mouse – 97%
Rat – 97%

Frequently used together

Recombinant human noggin protein

Bioactivity

R-spondin 3 activity is determined using the Wnt-responsive firefly luciferase reporter assay. HEK293T cells transfected with reporter TOP-FLASH are treated in triplicate with increasing concentration of R-spondin 3 in the presence of Wnt-conditioned media (1:8 dilution). RSP1 enhances Wnt-ß catenin signaling in HEK239T cells. Cells are grown overnight, and luciferase activity is measured and normalized.

EC50 = 0.3 nM (5 ng/mL).

Data from Qk032 #010.

Purity

R-spondin 3 bioactive domain migrates at 17 kDa in non-reducing (-βME) conditions and upon reduction (+βME).

Purified recombinant protein (7 µg) was resolved using 15% w/v SDS-PAGE in reduced (+β-mercaptothanol, R) and non-reduced conditions (NR) and stained with Coomassie Brilliant Blue R250.

Data from Qk032 lot #010

Further quality assays

Mass spectrometry: single species with expected mass
Analytical reversed-phase: single sharp peak
Endotoxin: <0.005 EU/μg protein (below level of detection)
Recovery from stock vial: >95%

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Download MSDS

We are a company founded and run by scientists to provide a service and support innovation in stem cell biology and regenerative medicine. All our products are exceptionally high purity, with complete characterisation and bioactivity analysis on every lot.

Protein background

R-Spondin 3 (RSPO3) protein belongs to the R-spondin family comprizing four structurally-related, secreted ligands (RSPO 1-4)¹. All contain furin-like and thrombospondin structural domains. R-spondins are activators of the canonical Wnt signaling pathway. Receptors include the leucine-rich repeat-containing G-protein coupled receptors (LGR) 4-6². In the colon, R-spondin 3 promotes stem cell recovery and epithelial repair via induction of Wnt.

An R-spondin, such as R-spondin 3, is an essential component of Wnt 3a, R-spondin-3 (or 1,2), Noggin (WRN) media used widely in propagation of intestinal organoids². There is a drive towards improved reproducibility in stem cell and organoid culture. Conditioned media (spent media from cells that secrete growth factors such as Wnt and R-spondin, along with several other factors and waste products) is both challenging to manufacture consistently and conveniently, and a source of variability between labs³.

Our products are for research use only and not for diagnostic or therapeutic use. Products are not for resale.

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