Human RSPO1 HEK293 Overexpression Lysate: Product Information
This Human RSPO1 overexpression lysate was created in HEK293 Cells and intented for use as a Western blot (WB) positive control. Purification of RSPO1 protein (Cat: 11083-H08H1) from the overexpression lysate was verified.
A DNA sequence encoding the amino acids (Met 1-Ala 146) of human RSPO1 (NP_001033722.1) was expressed, fused with a polyhistidine tag at the C-terminus.
The secreted recombinant human RSPO1 (aa 1-146) comprises 137 amino acids and has a predicted molecular mass of 14 kDa. As a result of glycosylation, rhRSPO1 migrates as an approximately 23 kDa band in SDS-PAGE under reducing conditions.
Human RSPO1 HEK293 Overexpression Lysate: Usage Guide
Cell lysate was prepared by homogenization of the over-expressed cells in ice-cold modified RIPA Lysis Buffer with cocktail of protease inhibitors (Sigma). Cell debris was removed by centrifugation. Protein concentration was determined by Bradford assay (Bio-Rad protein assay, Microplate Standard assay). The cell lysate was boiled for 5 min in 1 x SDS loading buffer (50 mM Tris-HCl pH 6.8, 12.5% glycerol, 1% sodium dodecylsulfate, 0.01% bromophenol blue) containing 5% b-mercaptoethanol, and lyophilized.
1. Centrifuge the tube for a few seconds and ensure the pellet at the bottom of the tube.
2. Re-dissolve the pellet using 200μL pure water and boil for 2-5 min.
1 X Sample Buffer (1 X modified RIPA buffer+1 X SDS loading buffer).
Stability & Storage
Store at 4℃ for up to twelve months from date of receipt. After re-dissolution, aliquot and store at -80℃ for up to twelve months. Avoid repeated freeze-thaw cycles.
Western Blot (WB) Optimal dilutions/concentrations should be determined by the end user.
Human RSPO1 HEK293 Overexpression Lysate: Alternative Names
Human CRISTIN3 Overexpression Lysate; Human R-Spondin 1 Overexpression Lysate; Human RSPO Overexpression Lysate
RSPO1 Background Information
RSPO1 gene is a member of the R-spondin family. It encodes RSPO1 which is known as a secreted activator protein with two cystein-rich, furin-like domains and one thrombospondin type 1 domain. In mice, RSPO1 induces the rapid onset of crypt cell proliferation and increases intestinal epithelial healing, providing a protective effect against chemotherapy-induced adverse effects. This protein is an activator of the beta-catenin signaling cascade, leading to TCF-dependent gene activation. RSPO1 acts both in the canonical Wnt/beta-catenin-dependent pathway and in non-canonical Wnt signaling pathway, probably by acting as an inhibitor of ZNRF3, an important regulator of the Wnt signaling pathway. It also acts as a ligand for frizzled FZD8 and LRP6.
Kamata T, et al. (2004) R-spondin, a novel gene with thrombospondin type 1 domain, was expressed in the dorsal neural tube and affected in Wnts mutants. Biochim Biophys Acta. 1676(1):51-62.
Ota T, et al. (2004) Complete sequencing and characterization of 21,243 full-length human cDNAs. Nat Genet. 36(1):40-5.
Strausberg RL, et al. (2003) Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences. Proc Natl Acad Sci. 99(26):16899-903.
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