Negatively regulates stress-induced JNK activation and apoptosis by promoting MAP2K7 phosphorylation and inhibiting its ability to activate JNK. Following prolonged stress, anti-apoptotic effect stops because of degradation of RASSF7 protein via the ubiquitin-proteasome pathway. Required for the activation of AURKB and chromosomal congression during mitosis where it stimulates microtubule polymerization. Interacts with MAP2K7 and GTP-bound NRAS. Colocalizes with gamma-tubulin. Polyubiquitinated and degraded by the proteasome upon prolonged stress stimuli.