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Sequences of initiator and elongator methionine tRNAs in bean mitochondria

Localization of the corresponding genes on maize and wheat mitochondrial genomes

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Summary

Two bean mitochondria methionine transfer RNAs, purified by RPC-5 chromatography and two-dimensional gel electrophoresis, have been sequenced usingin vitro post-labeling techniques.

One of these tRNAsMet has been identified by formylation using anE. coli enzyme as the mitochondrial tRNAF Met. It displays strong structural homologies with prokaryotic and chloroplast tRNAF Met sequences (70.1–83.1%) and with putative initiator tRNAm Met genes described for wheat, maize andOenothera mitochondrial genomes (88.3–89.6%).

The other tRNAMet, which is the mitochondrial elongator tRNAF Met, shows a high degree of sequence homology (93.3–96%& with chloroplast tRNAm Met, but a weak homology (40.7%) with a sequenced maize mitochondrial putative elongator tRNAm Met gene.

Bean mitochondrial tRNAF Met and tRNAm Met were hybridized to Southern blots of the mitochondrial genomes of wheat and maize, whose maps have been recently published (15, 22), in order to locate the position of their genes.

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Authors and Affiliations

  1. Institut de Biologie Moléculaire et Cellulaire, Université Louis Pasteur, 15 Rue Descartes, 67084, Strasbourg Cedex, France

    Laurence Marechal, Pierre Guillemaut, Jean-Michel Grienenberger, Geneviève Jeannin & Jacques-Henry Weil

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  1. Laurence Marechal
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  2. Pierre Guillemaut
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  3. Jean-Michel Grienenberger
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  4. Geneviève Jeannin
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  5. Jacques-Henry Weil
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Marechal, L., Guillemaut, P., Grienenberger, JM. et al. Sequences of initiator and elongator methionine tRNAs in bean mitochondria. Plant Mol Biol 7, 245–253 (1986). https://doi.org/10.1007/BF00752898

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  • DOI: https://doi.org/10.1007/BF00752898

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