Transcription factor. Plays a crucial role in cell survival and RAD51 foci formation in response to methylating DNA damage. Involved in regulating the activity of ATM in the absence of DNA damage. May play a role in stabilizing ATM. Binds to the DYNLL1 promoter and activates its transcription. Interacts via its C-terminus with ATM. Interacts with DYNLL1; this interaction inhibits ATMIN transcriptional activity and hence may play a role in a feedback loop whereby DYNLL1 inhibits transactivation of its own promoter by ATMIN. Nuclear, in discrete foci during G1 phase. Ubiquitously expressed in normal tissues and cancer cell lines with highest levels in placenta and skeletal muscle. Extended N-terminus. Truncated N-terminus.