JB170 is a potent and highly specific PROTAC-mediated AURORA-A (Aurora Kinase) degrader (DC50=28 nM) by linking Alisertib, to the Cereblon-binding molecule Thalidomide. JB170 preferentially binds AURORA-A (EC50=193 nM) over AURORA-B (EC50=1.4 µM). JB170-mediated S-phase arrest is caused specifically by AURORA-A depletion. JB170 has excellent ability to inhibit non-catalytic function of AURORA-A kinase.