UBA domain found in E3 ubiquitin-protein ligase RING finger protein 31 and similar proteins
RNF31, also called HOIL-1-interacting protein (HOIP), or zinc in-between-RING-finger ubiquitin-associated domain protein, together with HOIL-1 and SHARPIN, forms the E3-ligase complex (also known as linear-ubiquitin-chain assembly complex LUBAC) that regulates NF-kappaB activity and apoptosis. RNF31 contains a central ubiquitin-associated (UBA) domain that is responsible for the interaction with the N-terminal ubiquitin-like domain (UBL) of HOIL-1L. In addition, RNF31 can interact with the atypical mammalian orphan receptor DAX-1, trigger DAX-1 ubiquitination and stabilization, and participate in repressing steroidogenic gene expression.
Jiyao W et al.(2023). "The conserved domain database in 2023.",