RNF139 Polyclonal antibody

The RNF139 gene (ring-finger protein 139), also known as TRC8 (translocation in renal carcinoma from chromosome 8), was first identified from a family with 3;8 chromosomal translocation and hereditary renal cell carcinoma and thyroid cancer (PMID:22689053). RNF139 encodes an endoplasmic reticulum (ER) protein with 10 transmembrane segments that contain a sterol-sensing domain and a RING finger motif encoding an E3 ubiquitin ligase (PMID: 19706601). Northern blot and dot blot show that RNF139 is highly expressed in the testis, placenta, and adrenal gland and is expressed at lower levels in the heart, brain, liver, skeletal muscle, and pancreas (PMID: 9689122). It is reported that TRC8 suppresses tumorigenesis by targeting heme oxygenase-1 (HO-1), an antioxidant enzyme highly expressed in various cancers, for ubiquitination and degradation (PMID:22689053). TRC8 is also involved in cholesterol and fatty acid biosynthesis that are transcriptionally regulated by the sterol response element binding proteins (SREBPs) (PMID:17016439). Acetylation, phosphorylation, and autoubiquitination are common post-translational modifications of FNF139 protein.