psammaplin a

Psammaplin A, a marine metabolite, functions as a robust inhibitor of HDAC and DNA methyltransferases, displaying notable potency and selectivity as a DAC1 inhibitor, with an IC50 value of 0.9 nM. It exhibits antimicrobial effects against Gram-positive bacteria and inhibits both DNA synthesis and DNA gyrase activity, also demonstrating antitumor activity[1][2].