Binds to the consensus sequence 5'-AGAGTG-3' and has transcriptional activator activity. May play a role in apoptosis. Highest expression detected in thymus, brain and ovary. Low levels detected in naive T-cells. Mice display no obvious defects in development, hematopoiesis or T-cell function. Deletion of Axud1, Csrnp2 and Csrnp3 together causes partial neonatal lethality, suggesting that they have redundant functions. Belongs to the AXUD1 family.