Palindromic repetitive elements in the mitochondrial genome of Volvox 1

FEBS Letters

Shiraishi, Hideaki¹  Shimizu, Toshinobu¹  Inoue, Tan¹  Aono, Naoki¹ 

[1] Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan

关键词: Mitochondrial genome;    Group I intron;    Palindromic repetitive sequence;    Molecular evolution of functional RNA;    Volvox;    cob;    apocytochrome b;    cox I;    cytochrome c oxidase subunit I;    ORF;    open reading frame;   

DOI  :  10.1016/S0014-5793(02)02832-6

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Group I introns were found in the cob and cox I genes of Volvox carteri. These introns contain tandem arrays of short palindromic sequences that are related to each other. Inspection of other regions in the mtDNA revealed that similar palindromic repetitive sequences are dispersed in the non-protein coding regions of the mitochondrial genome. Analysis of the group I intron in the cob gene of another member of Volvocaceae, Volvox aureus, has shown that its sequence is highly homologous to its counterpart in V. carteri with the exception of a cluster of palindromic sequences not found in V. carteri. This indicates that the palindromic clusters were inserted into the introns after divergence of the two species, presumably due to frequent insertions of the palindromic elements during evolution of the Volvocaceae. Possible involvement of the palindromic repetitive elements in the molecular evolution of functional RNAs is discussed.

【 授权许可】

Unknown