Rffl: Proteins and Enzymes

RFFL, also known as Rififylin, RING finger and FYVE-like domain-containing protein 1, FYVE-RING finger protein, Sakura, Fring, Caspases-8 and -10-associated RING finger protein 2, CARP-2, Caspase regulator CARP2, RING finger protein 189 and RING finger protein 34-like, is a novel modulator of NF-kB activation. RFFL possesses E3 ubiquitin protein ligase activity and has been shown to regulate the levels of CASP8 and CASP10 by targeting them for proteasomal degradation. RFFL also possesses anti-apoptotic activity and may bind phosphatidylinositol phosphates. RFFL is a membrane bound cytoplasmic protein that is expressed ubiquitously. RFFL can be detected in spleen, thymus, prostate, testis, ovary, small intestine, colon and peripheral blood leukocytes and is rapidly degraded after stimulation with TNFSF10, and probably by caspases. Multiple transcript variants have been detected for this protein.