Messenger RNA Turnover Processes in Escherichia coli, Bacillus subtilis, and Emerging Studies in Staphylococcus aureus

Table 2

E. coli 3^→5^ exoribonucleases.

Ribonuclease	Gene	Size	tRNA processing mechanism	mRNA stability
PNPase	pnp	80 kDa	ND	yes
Oligo-RNase	orn	38 kDa	ND	yes
RNase D	rnd	42 kDa	Final processing of 3^ terminus	ND
RNase II	rnb	72 kDa	3^ trailer removal	yes
RNase PH	rph	24 kDa	Removal of +4, +3, and +2 residues after the 3^ CCA	ND
RNase R	rnr	95 kDa	ND	yes
RNase T	rnt	23 kDa	Removal of +4, +3, and +1 residues after the 3^ CCA	ND