Dcp2 mediated decapping of mRNAs is a key step in 5'-3' transcript decay. Using NMR-based analysis, it is now shown that the cap is recognized by two distinct regions in the regulatory and catalytic domains of Dcp2. This argues that cap recognition involves these regions coming together, in a step promoted by the regulatory factor Dcp1, thus leading to catalysis.
- Stephen N Floor
- Brittnee N Jones
- John D Gross