The protein component of bacterial ribonuclease P flickers the metal ion response to the substrate shape preference of the ribozyme.

نویسندگان

  • Tomoaki Ando
  • Terumichi Tanaka
  • Yo Kikuchi
چکیده

The substrate shape specificity of the Escherichia coli ribonuclease P (RNase P) ribozyme depends on the concentration of magnesium ion. At 10 mM or more, it can cleave a hairpin substrate as well as a cloverleaf pre-transfer RNA (tRNA). The results showed, however, that the holo enzyme cleaved the hairpin substrate at low concentrations of magnesium ion. Considering that the homologous E. coli tRNAs are resistant to internal cleavage by the RNase P, the phenomena suggest that this catalytic activity might take part in the removing the mis-folded RNAs in the cell.

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عنوان ژورنال:
  • Bioscience, biotechnology, and biochemistry

دوره 67 10  شماره 

صفحات  -

تاریخ انتشار 2003