PPARγ3 mRNA: a distinct PPARγ mRNA subtype transcribed from an independent promoter

Abstract
PPARγ is a member of the peroxisome proliferator activated receptors (PPAR) subfamily of nuclear receptors. So far two PPARγ isoforms, PPARγ1 and PPARγ2, were known in mammals. We describe the structure of a novel human PPARγ subtype, PPARγ3. The PPARγ3 mRNA is transcribed from a novel promoter localized 5′ of exon A2. PPARγ3 mRNA expression was restricted to adipose tissue and large intestine. Similar to human PPARγ1 and -2, PPARγ3 is activated by thiazolidinediones and prostaglandin J derivatives and binds with high affinity to a PPRE.