Interleukin 22, Recombinant, Rat (IL-22, IL-10 Related T cell-derived Inducible Factor, IL-TIF) (Recombinant Protein)

*Purity: Highly Purified > 97% as determined by SDS-PAGE and visualized by silver stain. Endotoxin: ; *Accession#: NP_065386.1; NM_020525.4; Q6NWP4; *Description: Rat Interleukin-22 (IL-22) was initially identified as a gene induced by IL-9 in mouse T cells and mast cells. It belongs to the IL-10-related cytokine family that consists of six members (IL-10, IL-19, IL-20, IL-22, IL-24/MDA-7 and IL-26/AK155). These proteins share structural homology and some degree of amino acid sequence homology to IL-10. Receptors for these proteins are members of the class II cytokine receptor family. The rat IL-22 coding region corresponding to amino acids 48-179 was deduced from a rat genomic clone (Genbank accession #AC111483). The N-terminal portion was cloned from rat adipocyte first strands using degenerate forward primers based on the human and mouse IL-22 amino acid sequences in two independent PCR reactions. Rat IL-22 cDNA predicts a 179aa residue precursor protein with a putative 33aa signal peptide that is cleaved to generate a 147aa mature protein, which shares ~92% and 79% aa sequence identity with mouse and human IL-22, respectively. IL-22 signals through a heterodimeric receptor complex composed of the IL-22R (CRF2-9) subunit and the b chain of IL-10R. In addition, IL-22 also binds to a secreted member of the class II cytokine receptor family called IL-22BP that acts as a natural IL-22 antagonist. IL-22 upregulates acute-phase reactants in the liver and hepatoma cells. In a rat hepatoma cell line, IL-22 has been shown to activate the Jak/STAT and MAPK signaling pathways.