Switching Partners in a Regulatory Tango

Abstract
The coactivator CBP/p300 cooperates with the enzyme CARM1 to boost the activity of the nuclear hormone receptor transcription factors. But what is the relationship between CBP/p300 and CARM1? As Nishioka and Reinberg explain in their Perspective, new work reveals that CARM1 regulates the availability of CBP/p300 by methylating the KIX domain of this coactivator.