Binds to the consensus sequence 5'-AGAGTG-3' and has transcriptional activator activity. Plays a role in apoptosis. Detected only in the brain of 15 dpc, 18 dpc, newborn and P6 mice (at protein level). Expressed during embryonic development and also detected a week after birth. Expression decreases by 14 days after birth and is not detected in the adult (at protein level). Mice display no obvious defects in development, hematopoiesis or T-cell function. Deletion of Axud1, Csnrp2 and Csnrp3 together causes partial neonatal lethality, suggesting that they have redundant functions. Belongs to the AXUD1 family.