Interleukin-22 receptor subunit alpha-2 (IL22RA2) is a soluble member of the type II cytokine receptor family. Through binding to IL22,IL22RA2 prevents the interaction of IL22 with the functional IL22-R complex and blocks the activity of IL22 (in vitro). IL22RA2 may play an important role as an IL22 antagonist in the regulation of inflammatory responses. Alternative splicing results in multiple transcript variants encoding distinct isoforms.