Rpp14 and Rpp29, two protein subunits of human ribonuclease P

RNA. 1999 Feb;5(2):153-7. doi: 10.1017/s135583829800185x.

Abstract

In 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 enzyme.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Sequence
  • Base Sequence
  • Cloning, Molecular
  • Endoribonucleases / genetics*
  • Fungal Proteins / genetics
  • Genes, Fungal / genetics
  • HeLa Cells / enzymology*
  • Humans
  • Molecular Sequence Data
  • Precipitin Tests
  • RNA, Catalytic / genetics*
  • Recombinant Proteins / genetics
  • Ribonuclease P
  • Ribonucleoproteins / genetics*
  • Sequence Alignment

Substances

  • Fungal Proteins
  • RNA, Catalytic
  • Recombinant Proteins
  • Ribonucleoproteins
  • Endoribonucleases
  • RPP14 protein, human
  • Ribonuclease P

Associated data

  • GENBANK/AF001176