KPC1, FP1477, E3 ubiquitin-protein ligase RNF123, Kip1 ubiquitination-promoting complex protein 1, RING finger protein 123, RNF123
Catalytic subunit of the KPC complex that acts as E3 ubiquitin-protein ligase. Required for poly-ubiquitination and proteasome-mediated degradation of CDKN1B during G1 phase of the cell cycle.