THE GENE FOR RIBOSOMAL-PROTEIN S10 IS PRESENT IN MITOCHONDRIA OF PEA AND POTATO BUT ABSENT FROM THOSE OF ARABIDOPSIS AND OENOTHERA

被引:33
作者
KNOOP, V
EHRHARDT, T
LATTIG, K
BRENNICKE, A
机构
[1] Institut für Genbiologische Forschung GmbH, Berlin, D-14195
关键词
RNA EDITING; GROUP-II INTRON; GENE TRANSFER; EVOLUTION; TRANSFER-RNA GENES;
D O I
10.1007/BF00314448
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
A novel group II intron has been identified in the pea (Pisum sativum) mitochondrial genome. The gene harbouring this intron is identified as rps10 (encoding protein S10 of the small ribosomal subunit) by similarity to its known homologues in bacteria and in the mitochondrion of the liverwort Marchantia polymorpha. The rps10 gene is transcribed in pea, the intron is removed, and RNA editing in the rps10 reading frame increases similarity to its homologue in the M. polymorpha mitochondrion. Contrary to the situation in bacteria and Marchantia, rps10 is not part of a ribosomal-protein gene cluster in pea. It is flanked upstream by the genes trnF and trnP, encoding phenylalanine- and proline-accepting tRNAs, and downstream by cox1, encoding subunit 1 of the cytochrome-c-oxidase. Southern hybridization shows that sequences homologous to rps10 exist in potato mitochondria but not in mitochondria of Oenothera berteriana and Arabidopsis thaliana. The pea rps10 intron is homologous to introns in rrn26 and cox3 in the Marchantia mitochondrial genome, while the Marchantia rps10 gene lacks an intron.
引用
收藏
页码:559 / 564
页数:6
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