The potato mitochondrial initiator methionine tRNA gene and its flanking regions: an illustration of the diversity of mitochondrial genome rearrangements among plant species

The initiator methionine transfer RNA (tRNA(fMet)) gene was identified on a 347 bp Eco RI-Hind III DNA fragment of the potato mitochondrial (mt) genome. The sequence of this gene shows 1 to 7 nucleotide differences with the other plant mt tRNAs(fMet) or tRNA(fMet) genes studied so far. Whereas the t...

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Bibliographic Details
Published in:Plant molecular biology 1993-09, Vol.22 (6), p.1157-1161
Main Authors: Marechal-Drouard, L. (Louis Pasteur Univ., Strasbourg (France). Inst. de Biologie Moleculaire des Plantes), Khamiss, O, Dietrich, A
Format: Article
Language:English
Subjects:
ADN
ARN DE TRANSFERENCIA
ARN DE TRANSFERT
Base Sequence
Biological and medical sciences
DNA
Fundamental and applied biological sciences. Psychology
GENE
Gene Rearrangement
GENES
Genes, Plant
Genes. Genome
Genetic Variation
METHIONINE
METIONINA
MITOCHONDRIA
MITOCHONDRIE
MITOCONDRIA
Molecular and cellular biology
Molecular genetics
Molecular Sequence Data
Nucleic Acid Conformation
NUCLEOTIDE SEQUENCE
Plants - genetics
Pseudogenes
RECOMBINACION
RECOMBINAISON
RECOMBINATION
RNA - chemistry
RNA - genetics
RNA, Mitochondrial
RNA, Transfer, Met - chemistry
RNA, Transfer, Met - genetics
SECUENCIA NUCLEICA
SEQUENCE NUCLEIQUE
SOLANUM TUBEROSUM
Solanum tuberosum - genetics
TRANSFER RNA
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Description
Summary:The initiator methionine transfer RNA (tRNA(fMet)) gene was identified on a 347 bp Eco RI-Hind III DNA fragment of the potato mitochondrial (mt) genome. The sequence of this gene shows 1 to 7 nucleotide differences with the other plant mt tRNAs(fMet) or tRNA(fMet) genes studied so far. Whereas the tRNA(fMet) gene is present as a single copy in the potato mt genome, a tRNA 'pseudogene' corresponding to 60% of a complete tRNA (from the 5' end to the variable region) and located at 105 nucleotides upstream of the tRNA(fMet) gene on the opposite strand was shown to be repeated at least three times. Furthermore, the physical environment of the tRNA(fMet) gene in the mt genome is very different among plants, which suggests that the tRNA(fMet) gene region has often been implicated in recombination events of plant mt genomes leading to important rearrangements in gene order.
ISSN:0167-4412
1573-5028
DOI:10.1007/BF00028985