What's Prokaryotic mRNA Degradation involving multiple enzymes?

Degradation of bacterial mRNAs is initiated by removal of a pyrophosphate from the 5′ terminus. Monophosphorylated mRNAs are degraded during translation in a two-step cycle involving endonucleolytic cleavages, followed by 3′ to 5′ digestion of the resulting fragments. 3′ polyadenylation can facilitate the degradation of mRNA fragments containing secondary structure.