E3 ubiquitin-protein ligase RNF26 (RNF26)

E3 ubiquitin-protein ligase that plays a key role in endosome business by keeping vesicles in the perinuclear cloud (PubMed:27368102). Acts as a stage for perinuclear positioning of the endosomal system by mediating ubiquitination of SQSTM1 (PubMed:27368102).

Ubiquitinated SQSTM1 attracts specific vesicle-associated adapters, forming a molecular bridge that restrains cognate vesicles in the perinuclear area and organizes the endosomal pathway for efficient cargo transport (PubMed:27368102). Also acts as a regulator of type I interferon production in response to viral infection by mediating the formation of'Lys-11'-linked polyubiquitin chains on TMEM173/STING, leading to stabilize TMEM173/STING (PubMed:25254379).