metabolism |
distinct roles of RNase E and RNase G in mRNA decay and tRNA processing, overview |
Escherichia coli |
additional information |
neither the native nor N-terminal extended form of RNase G can restore the growth defect associated with either the rne-1 or rneD1018 alleles, encoding RNase E, even when expressed at very high protein levels. In contrast, two distinct spontaneously derived single amino acid substitutions within the predicted RNase H domain of RNase G, generating the rng-219 and rng-248 alleles, result in complementation of the growth defect associated with various RNase E mutants. Complementation of the growth defect associated with RNase E-deficient strains is dependent on the intracellular level of the Rng-219 and Rng-248 proteins |
Escherichia coli |
physiological function |
RNase G is involved in the maturation of the 5' terminus of 16S rRNA, the processing of a few tRNAs, and the initiation of decay of a limited number of mRNAs but is not required for cell viability and cannot substitute for RNase E under normal physiological conditions |
Escherichia coli |