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. 1993 Feb 11;21(3):671–679. doi: 10.1093/nar/21.3.671

Characterization of ribonuclease P RNAs from thermophilic bacteria.

J W Brown 1, E S Haas 1, N R Pace 1
PMCID: PMC309168  PMID: 7680125

Abstract

The catalytic RNA component of bacterial RNase P is responsible for the removal of 5' leader sequences from precursor tRNAs. As part of an on-going phylogenetic comparative characterization of bacterial RNase P, the genes encoding RNase P RNA from the thermophiles Thermotoga maritima, Thermotoga neapolitana, Thermus aquaticus, and a mesophilic relative of the latter, Deinococcus radiodurans, have been cloned and sequenced. RNAs transcribed from these genes in vitro are catalytically active in the absence of other components. Active holoenzymes have been reconstituted from the T.aquaticus and T.maritima RNAs and the protein component of RNase P from Escherichia coli. The RNase P RNAs of T.aquaticus and T.martima, synthesized in vitro, were characterized biochemically and shown to be inherently resistant to thermal disruption. Several features of these RNAs suggest mechanisms contributing to thermostability. The new sequences provide correlations that refine the secondary structure model of bacterial RNase P RNA.

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Selected References

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