DNA damage-inducible transcript 4 protein (DDIT4)

Regulates cell growth, proliferation and survival through inhibition of the action of the mammalian target of rapamycin complex 1 (mTORC1). Inhibition of mTORC1 is mediated by a pathway which involves DDIT4/REDD1, AKT1, the TSC1-TSC2 complex and the GTPase RHEB.

Plays an essential role in responses to cellular energy levels and cellular stress, including responses to hypoxia and DNA damage. Regulates p53/TP53-mediated apoptosis in response to DNA damage through its effect on mTORC1 activity.