ISSN:
1573-5028
Keywords:
plant mitochondrial genome
;
potato
;
tRNAf Met
;
tRNA pseudogene
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The initiator methionine transfer RNA (tRNAf Met) gene was identified on a 347 bpEco 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 tRNAsf Met or tRNAf Met genes studied so far. Whereas the tRNAf Met 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 tRNAf Met gene on the opposite strand was shown to be repeated at least three times. Furthermore, the physical environment of the tRNAf Met gene in the mt genome is very different among plants, which suggests that the tRNAf Met gene region has often been implicated in recombination events of plant mt genomes leading to important rearrangements in gene order.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00028985
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