PubMed:10024167 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PubMed/sourceid/10024167","sourcedb":"PubMed","sourceid":"10024167","source_url":"http://www.ncbi.nlm.nih.gov/pubmed/10024167","text":"Rpp14 and Rpp29, two protein subunits of human ribonuclease P.\nIn HeLa cells, the tRNA processing enzyme ribonuclease P (RNase P) consists of an RNA molecule associated with at least eight protein subunits, hPop1, Rpp14, Rpp20, Rpp25, Rpp29, Rpp30, Rpp38, and Rpp40. Five of these proteins (hPop1p, Rpp20, Rpp30, Rpp38, and Rpp40) have been partially characterized. Here we report on the cDNA cloning and immunobiochemical analysis of Rpp14 and Rpp29. Polyclonal rabbit antibodies raised against recombinant Rpp14 and Rpp29 recognize their corresponding antigens in HeLa cells and precipitate catalytically active RNase P. Rpp29 shows 23% identity with Pop4p, a subunit of yeast nuclear RNase P and the ribosomal RNA processing enzyme RNase MRP. Rpp14, by contrast, exhibits no significant homology to any known yeast gene. Thus, human RNase P differs in the details of its protein composition, and perhaps in the functions of some of these proteins, from the yeast 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