A trans-splicing group I intron and tRNA-hyperediting in the mitochondrial genome of the lycophyte Isoetes engelmannii.
A trans-splicing group I intron and tRNA-hyperediting in the mitochondrial genome of the lycophyte Isoetes engelmannii.
复制标题
DOI:
10.1093/nar/gkp532
复制
发表时间:
2009-08
影响因子:
14.9
通讯作者:
Knoop V
中科院分区:
文献类型:
--
作者:
Grewe F;Viehoever P;Weisshaar B;Knoop V
Plant mitochondrial genomes show much more evolutionary plasticity than those of animals. We analysed the first mitochondrial DNA (mtDNA) of a lycophyte, the quillwort Isoetes engelmannii, which is separated from seed plants by more than 350 million years of evolution. The Isoetes mtDNA is particularly rich in recombination events, and chloroplast as well as nuclear DNA inserts document the incorporation of foreign sequences already in this most ancestral vascular plant lineage. On the other hand, particularly small group II introns and short intergenic regions reveal a tendency of evolution towards a compact mitochondrial genome. RNA editing reaches extreme levels exceeding 100 pyrimidine exchanges in individual mRNAs and, hitherto unobserved in such frequency, also in tRNAs with 18 C-to-U conversions in the tRNA for proline. In total, some 1500 sites of RNA editing can be expected for the Isoetes mitochondrial transcriptome. As a unique molecular novelty, the Isoetes cox1 gene requires trans-splicing via a discontinuous group I intron demonstrating disrupted, but functional, RNAs for yet another class of natural ribozymes.
登录
查看更多内容
影响因子:
10.7
作者:
Chaw, Shu-Miaw;Shih, Arthur Chun-Chieh;Chou, The-Yuan
通讯作者:
Chou, The-Yuan
DOI:
10.1073/pnas.042694899
发表时间:
2002-07-23
影响因子:
11.1
作者:
Adams, KL;Qiu, YL;Palmer, JD
通讯作者:
Palmer, JD
影响因子:
64.5
作者:
CHOQUET, Y;GOLDSCHMIDTCLERMONT, M;ROCHAIX, JD
通讯作者:
ROCHAIX, JD
影响因子:
14.9
作者:
JANKE, A;PAABO, S
通讯作者:
PAABO, S
影响因子:
5.3
作者:
Antes, T;Costandy, H;Miller, D
通讯作者:
Miller, D