PMID: 8950187Nov 11, 1996Paper

Analysis of the interaction between bovine mitochondrial 28 S ribosomal subunits and mRNA

Biochimica Et Biophysica Acta
M A FarwellL L Spremulli

Abstract

The small subunit of the bovine mitochondrial ribosome forms a tight complex with mRNAs. This [28 S:mRNA] complex forms as readily on circular mRNAs as on linear mRNAs indicating that a free 5' end on the mRNA is not required for the interaction observed. The effects of monovalent cations on the equilibrium association constant and on the forward and reverse rate constants governing this interaction have been determined. Monovalent cations have a strong effect on the forward rate constant. Increasing the KCl concentration from 1 mM to 100 mM reduces kon by nearly 100-fold. Monovalent cations have only a small effect on the reverse rate constant, koff'. Analysis of these data indicates that the rate laws governing the formation and dissociation of the [28 S:mRNA] complex cannot be deduced from the chemical equation. This observation suggests that there are "hidden intermediates' in the formation and dissociation of this complex. The implications of these observations are discussed in terms of a model for the interaction between the mitochondrial 28 S subunit and mRNAs.

References

Oct 25, 1992·Nucleic Acids Research·M Puttaraju, M D Been
Jan 1, 1992·Critical Reviews in Biochemistry and Molecular Biology·M Kozak
Sep 1, 1991·Proceedings of the National Academy of Sciences of the United States of America·H KosekiM Taniguchi
Jun 26, 1990·Biochemistry·C O Gualerzi, C L Pon
Sep 30, 1987·Biochemical and Biophysical Research Communications·L Spremulli, B L Kraus
Sep 11, 1993·Nucleic Acids Research·M PuttarajuM D Been
May 1, 1994·Molecular Biology Reports·H J Pel, L A Grivell
Nov 1, 1993·Trends in Biochemical Sciences·J Lagúnez-Otero
Dec 5, 1995·Proceedings of the National Academy of Sciences of the United States of America·K LuoH F Lodish

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Citations

Dec 8, 2009·Biochemical and Biophysical Research Communications·Brooke E ChristianLinda L Spremulli
Dec 3, 1999·Biochemical and Biophysical Research Communications·E Cavdar KocL L Spremulli

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