A POTATO MITOCHONDRIAL ISOLEUCINE TRANSFER-RNA IS CODED FOR BY A MITOCHONDRIAL GENE POSSESSING A METHIONINE ANTICODON

被引:73
作者
WEBER, F [1 ]
DIETRICH, A [1 ]
WEIL, JH [1 ]
MARECHALDROUARD, L [1 ]
机构
[1] UNIV STRASBOURG 1,CNRS,INST BIOL MOLEC PLANTES,12 RUE GEN ZIMMER,F-67084 STRASBOURG,FRANCE
关键词
D O I
10.1093/nar/18.17.5027
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The nucleotide sequence of a potato mitochondrial tRNAlle has been determined. This tRNA has a lysidine-like minor nucleotide in the first position of the ariticodon (position 34). The corresponding mitochondrial gene has been cloned and sequenced. This gene has a CAT anticodon which corresponds to methionine. The C residue in the anticodon must therefore be post-transcriptionally modified. The mature tRNA has isoleucine-accepting activity but no methionine-accepting activity. This is the first report showing that in plant mitochondria a post-transcriptional modification could change the amino-acid specificity of a tRNA, as compared to that of the corresponding gene. © 1990 Oxford University Press.
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页码:5027 / 5030
页数:4
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