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Recombinant human R-spondin 3 protein

QK032

Brand: Qkine

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.

Qk032 is a 17 kDa 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 origin-free and carrier-protein free.

Currency: 

Product name Catalog number Pack size Price Price (USD) Price (GBP) Price (EUR)
Recombinant human R-spondin 3 protein, 25 µg QK032-0025 25 µg (select above) $ 210.00 £ 155.00 € 182.00
Recombinant human R-spondin 3 protein, 50 µg QK032-0050 50 µg (select above) $ 290.00 £ 210.00 € 246.00
Recombinant human R-spondin 3 protein, 100 µg QK032-0100 100 µg (select above) $ 465.00 £ 340.00 € 398.00
Recombinant human R-spondin 3 protein, 500 µg QK032-0500 500 µg (select above) $ 1,650.00 £ 1,200.00 € 1,402.00
Recombinant human R-spondin 3 protein, 1000 µg QK032-1000 1000 µg (select above) $ 2,600.00 £ 1,900.00 € 2,220.00

Note: prices shown do not include shipping and handling charges.

Qkine company name and logo are the property of Qkine Ltd. UK.

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
Species reactivity

human

Species similarity:
bovine – 98%
porcine – 98%
mouse – 97%
rat – 97%

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 origin-free (AOF) and carrier protein-free.
  • Manufactured in Qkine's Cambridge, UK laboratories
  • Lyophilized from acetonitrile, TFA
  • Resuspend in 10 mM HCl at >100 µg/ml (provided with protein and free of charge), 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

Bioactivity

Human R-spondin 3 Qk032 protein bioactivity lot #010

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

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

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%

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) 4-6 [2]. 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 organoids [2]. 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 labs [3].

Background references

  1. de Lau, W. B. M., Snel, B. & Clevers, H. C. The R-spondin protein family. Genome biology 13, 242 (2012). doi.org/10.1186/gb-2012-13-3-242
  2. Sato, T. et al. Single Lgr5 stem cells build crypt-villus structures in vitro without a mesenchymal niche. Nature 459, 262–265 (2009). doi.org/10.1038/nature07935
  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). doi.org/10.1016/j.scr.2019.101430

Publications using recombinant human R-spondin 3 protein (Qk032)

Mass Generation and Long-term Expansion of Hepatobiliary Organoids from Adult Primary Human Hepatocytes.
Preprint on 11 June 2024 by Marsee, A., Richie, A., Myszczyszyn, A., et al.
View publication