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Human RNase P: a tRNA-processing enzyme and transcription factor Jarrous N; Reiner RNucleic Acids Res 2007[]; 35 (11): 3519-24Ribonuclease P (RNase P) has been hitherto well known as a catalytic ribonucleoprotein that processes the 5' leader sequence of precursor tRNA. Recent studies, however, reveal a new role for nuclear forms of RNase P in the transcription of tRNA genes by RNA polymerase (pol) III, thus linking transcription with processing in the regulation of tRNA gene expression. However, RNase P is also essential for the transcription of other small noncoding RNA genes, whose precursor transcripts are not recognized as substrates for this holoenzyme. Accordingly, RNase P can act solely as a transcription factor for pol III, a role that seems to be conserved in eukarya.|Cell Nucleus/enzymology[MESH]|Humans[MESH]|Protein Subunits/analysis/physiology[MESH]|RNA Polymerase III/metabolism[MESH]|RNA Processing, Post-Transcriptional[MESH]|RNA, Transfer/biosynthesis/*genetics/metabolism[MESH]|Ribonuclease P/analysis/*physiology[MESH]|Saccharomyces cerevisiae Proteins/physiology[MESH]|Transcription Factors/*physiology[MESH]|Transcription, Genetic[MESH] |
