IDENTIFICATION OF THE ENTIRE SET OF TRANSFERRED CHLOROPLAST DNA-SEQUENCES IN THE MITOCHONDRIAL GENOME OF RICE

被引:65
作者
NAKAZONO, M
HIRAI, A
机构
[1] NAGOYA UNIV,SCH AGR SCI,GRAD DIV BIOCHEM REGULAT,NAGOYA 46401,JAPAN
[2] UNIV TOKYO,FAC AGR,RADIAT GENET LAB,TOKYO 113,JAPAN
来源
MOLECULAR & GENERAL GENETICS | 1993年 / 236卷 / 2-3期
关键词
ORYZA-SATIVA; MITOCHONDRIAL DNA; CHLOROPLAST DNA; INTERORGANELLAR DNA TRANSFER; INTRAMITOCHONDRIAL RECOMBINATION;
D O I
10.1007/BF00277131
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 entire set of transferred chloroplast DNA sequences in the mitochondrial genome of rice (Oryza sativa cv. Nipponbare) was identified using clone banks that cover the chloroplast and mitochondrial genomes. The mitochondrial fragments that were homologous to chloroplast DNA were mapped and sequenced. The nucleotide sequences around the termini of integrated chloroplast sequences in the rice mtDNA revealed no common sequences or structures that might enhance the transfer of DNA. Sixteen chloroplast sequences, ranging from 32 bases to 6.8 kb in length, were found to be dispersed throughout the rice mitochondrial genome. The total length of these sequences is equal to approximately 6% (22 kb) of the rice mitochondrial genome and to 19% of the chloroplast genome. The transfer of segments of chloroplast DNA seems to have occurred at different times, both before and after the divergence of rice and maize. The mitochondrial genome appears to have been rearranged after the transfer of chloroplast sequences as a result of recombination at these sequences. The rice mitochondrial DNA contains nine intact tRNA genes and three tRNA pseudogenes derived from the chloroplast genome.
引用
收藏
页码:341 / 346
页数:6
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