Evolutionary aspects of "chloroplast-like" trnN and trnH expression in higher-plant mitochondria.
Curr Genet
; 32(5): 358-60, 1997 Nov.
Article
em En
| MEDLINE
| ID: mdl-9371887
ABSTRACT
Two identical "chloroplast-like" tRNAAsn genes, trnN1 and trnN2, have been identified in the potato (Solanum tuberosum) mitochondrial genome. The flanking sequences of trnN1 are unrelated to the corresponding authentic potato chloroplast regions, whilst those of trnN2 are very similar to the chloroplast sequences. The trnN1 copy is present in the mitochondrial genome of various plants whereas the second copy, trnN2, is absent from all the other plant genomes studied so far. Interestingly, both trnN copies are expressed in potato mitochondria. Sequences flanking the chloroplast-like tRNAHis gene (trnH), present as a single copy in the potato mitochondrial DNA, are unrelated to the corresponding chloroplast sequences, whereas chloroplast-derived sequences have been maintained in the vicinity of the maize chloroplast-like mitochondrial trnH gene. However, both the potato and the maize trnH are expressed in mitochondria.
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Base de dados:
MEDLINE
Assunto principal:
Solanum tuberosum
/
DNA Mitocondrial
/
Genes de Plantas
/
DNA de Plantas
Idioma:
En
Revista:
Curr Genet
Ano de publicação:
1997
Tipo de documento:
Article
País de afiliação:
França