THE WHEAT MITOCHONDRIAL GENOME CONTAINS AN ORF SHOWING SEQUENCE HOMOLOGY TO THE GENE ENCODING THE SUBUNIT 6 OF THE NADH-UBIQUINONE OXIDOREDUCTASE

被引:22
作者
HAOUAZINE, N
DESOUZA, AP
JUBIER, MF
LANCELIN, D
DELCHER, E
LEJEUNE, B
机构
[1] UNIV PARIS 11,BIOL MOLEC VEGETALE LAB,CNRS,UA 1128,BAT 430,F-91405 ORSAY,FRANCE
[2] CNRA,BIOL CELLULAIRE LAB,F-78026 VERSAILLES,FRANCE
关键词
MITOCHONDRIA; NAD6; NADH-UBIQUINONE REDUCTASE; TRITICUM-AESTIVUM;
D O I
10.1007/BF00040599
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
A region of the mitochondrial (mt) DNA of wheat was studied because of its homology with other plant mtDNAs. Sequence analysis revealed an open reading frame encoding a polypeptide of 247 amino acids. Comparison of the sequence of the putative polypeptide with the protein sequence data of the Swiss-Prot library reveals homology with subunit 6 of the NADH-ubiquinone complex of mitochondria from Marchantia polymorpha, Podospora anserina, Chlamydomonas reinhardtii and of chloroplasts from M. polymorpha and Oryza sativa. No similarity was detected when compared with the subunit 6 of animal mitochondria, probably due to the rapid evolution of the sequence. A single 1.2 kb transcript appears in northern RNA blots. We found 15 edited sites of which only 13 give amino acid changes. This is the first report of a mt nad6 gene in higher plants.
引用
收藏
页码:395 / 404
页数:10
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