In T-cells, functions as a regulator of p38 MAPKs by inhibiting p88 phosphorylation and activity. Might affect PCNA interaction with some CDK (cell division protein kinase) complexes; stimulates DNA excision repair in vitro and inhibits entry of cells into S phase. Interacts with MAPK14. Interacts with GADD45GIP1. Interacts with PCNA. By UV irradiation, X-rays, growth arrest and alkylating agents. The induction is mediate by some kinase(s) other than PKC. Belongs to the GADD45 family. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Apoptosis; Cell cycle regulation; DNA repair, damage; Nuclear receptor co-regulator
Biological Process: activation of MAPKKK activity; apoptosis; cell cycle arrest; DNA damage response, signal transduction; DNA damage response, signal transduction by p53 class mediator resulting in cell cycle arrest; DNA repair; positive regulation of apoptosis; positive regulation of JNK cascade; regulation of cyclin-dependent protein kinase activity