| General information | Literature | Expression | Regulation | Mutation | Interaction |
|
Basic Information |
|
|---|---|
Gene ID | 9781 |
Name | RNF144A |
Synonymous | RNF144|UBCE7IP4;ring finger protein 144A;RNF144A;ring finger protein 144A |
Definition | E3 ubiquitin-protein ligase RNF144A|UbcM4-interacting protein 4|probable E3 ubiquitin-protein ligase RNF144A|ring finger protein 144|ubiquitin conjugating enzyme 7 interacting protein 4|ubiquitin-conjugating enzyme 7-interacting protein 4 |
Position | 2p25.2 |
Gene type | protein-coding |
|
Title |
Abstract |
| RNF144A, an E3 ubiquitin ligase for DNA-PKcs, promotes apoptosis during DNA damage. | Several ring between ring fingers (RBR) -domain proteins, such as Parkin and Parc, have been shown to be E3 ligases involved in important biological processes. Here, we identify a poorly characterized RBR protein, Ring Finger protein 144A (RNF144A), as the first, to our knowledge, mammalian E3 ubiquitin ligase for DNA-PKcs. We show that DNA damage induces RNF144A expression in a p53-dependent manner. RNF144A is mainly localized in the cytoplasmic vesicles and plasma membrane and interacts with cytoplasmic DNA-dependent protein kinase, catalytic subunit (DNA-PKcs). DNA-PKcs plays a critical role in the nonhomologous end-joining DNA repair pathway and provides prosurvival signaling during DNA damage. We show that RNF144A induces ubiquitination of DNA-PKcs in vitro and in vivo and promotes its degradation. Depletion of RNF144A leads to an increased level of DNA-PKcs and resistance to DNA damaging agents, which is reversed by a DNA-PK inhibitor. Taken together, our data suggest that RNF144A may be involved in p53-mediated apoptosis through down-regulation of DNA-PKcs when cells suffer from persistent or severe DNA damage insults. |