A direct interaction between DCP1 and XRN1 couples mRNA decapping to 5' exonucleolytic degradation.
Braun, J.E., Truffault, V., Boland, A., Huntzinger, E., Chang, C.T., Haas, G., Weichenrieder, O., Coles, M., Izaurralde, E.(2012) Nat Struct Mol Biol 19: 1324-1331
- PubMed: 23142987 
- DOI: 10.1038/nsmb.2413
- Primary Citation of Related Structures:  
2LYD - PubMed Abstract: 
The removal of the mRNA 5' cap structure by the decapping enzyme DCP2 leads to rapid 5'→3' mRNA degradation by XRN1, suggesting that the two processes are coordinated, but the coupling mechanism is unknown. DCP2 associates with the decapping activators EDC4 and DCP1 ...