E3 ubiquitin ligase RNF157 (RNF157)

E3 ubiquitin ligase that ubiquitinates APBB1 for its degradation by the proteasome and so prevents apoptosis and promotes survival of neurons (PubMed:25342469). Has a dual role in neurons as it's also required for dendrite growth and maintenance for which its ligase activity isn't critical (PubMed:25342469).

May act as a scaffold molecule to modulate this procedure (PubMed:25342469). Acts as a downstream effector of the interconnected PI3K and MAPK signaling pathways and so participates in the regulation of the cell cycle (PubMed:28655764).