Lgr5/GPR49 Protein, Human (CHO, hFc)

The Lgr5/GPR49 protein is a receptor for R-spondins that enhances the canonical Wnt signaling pathway and marks stem cells in the intestinal epithelium and hair follicles. Lgr5/GPR49 binds R-spondins (RSPO1-4), binds to phosphorylated LRP6 and Frizzled receptors, initiates Wnt signaling and amplifies target gene expression. Lgr5/GPR49 Protein, Human (CHO, hFc) is the recombinant human-derived Lgr5/GPR49 protein, expressed by CHO , with C-hFc labeled tag. The total length of Lgr5/GPR49 Protein, Human (CHO, hFc) is 539 a.a., with molecular weight of 88-110 kDa.

The Lgr5/GPR49 Protein serves as the receptor for R-spondins, functioning to potentiate the canonical Wnt signaling pathway while concurrently serving as a distinctive stem cell marker in the intestinal epithelium and hair follicle. Upon binding to R-spondins (RSPO1, RSPO2, RSPO3, or RSPO4), Lgr5/GPR49 associates with phosphorylated LRP6 and frizzled receptors activated by extracellular Wnt, initiating the canonical Wnt signaling pathway and amplifying the expression of target genes. In contrast to classical G-protein coupled receptors, Lgr5/GPR49 does not activate heterotrimeric G-proteins to transduce the signal, highlighting its unique regulatory role in Wnt signaling. It plays a crucial role in the development and maintenance of adult intestinal stem cells during postembryonic development and has been identified in a complex with RNF43 and RSPO1. Additionally, Lgr5/GPR49 interacts with other R-spondin ligands, including RSPO2, RSPO3, and RSPO4, emphasizing its diverse participation in cellular signaling pathways.

Measured by its binding ability in a functional ELISA. Immobilized Human R-Spondin 1 at 5 μg/mL (100 μL/well) can bind Biotinylated Human LGR5. The ED₅₀ for this effect is 42.14 ng/mL.

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  Measured by its binding ability in a functional ELISA. Immobilized Human R-Spondin 1 at 5 μg/mL (100 μL/well) can bind Biotinylated Human LGR5.The ED₅₀ for this effect is 42.14 ng/mL.

Human

CHO

C-hFc

O75473 (G22-I560)

8549  [NCBI]

GSSPRSGVLLRGCPTHCHCEPDGRMLLRVDCSDLGLSELPSNLSVFTSYLDLSMNNISQLLPNPLPSLRFLEELRLAGNALTYIPKGAFTGLYSLKVLMLQNNQLRHVPTEALQNLRSLQSLRLDANHISYVPPSCFSGLHSLRHLWLDDNALTEIPVQAFRSLSALQAMTLALNKIHHIPDYAFGNLSSLVVLHLHNNRIHSLGKKCFDGLHSLETLDLNYNNLDEFPTAIRTLSNLKELGFHSNNIRSIPEKAFVGNPSLITIHFYDNPIQFVGRSAFQHLPELRTLTLNGASQITEFPDLTGTANLESLTLTGAQISSLPQTVCNQLPNLQVLDLSYNLLEDLPSFSVCQKLQKIDLRHNEIYEIKVDTFQQLLSLRSLNLAWNKIAIIHPNAFSTLPSLIKLDLSSNLLSSFPITGLHGLTHLKLTGNHALQSLISSENFPELKVIEMPYAYQCCAFGVCENAYKISNQWNKGDNSSMDDLHKKDAGMFQAQDERDLEDFLLDFEEDLKALHSVQCSPSPGPFKPCEHLLDGWLI

88-110 kDa

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  Greater than 90% as determined by reducing SDS-PAGE.

Lyophilized powder.

Lyophilized from a 0.2 μm filtered solution of 20 mM PB, 150 mM NaCl, pH 7.4.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.