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  • 1
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    The gene for ribosomal protein S10 is present in mitochondria of pea and potato but absent from those of Arabidopsis and Oenothera (1995)
    Springer
    Details
    Publication Date: 1995-05-01
    Print ISSN: 0172-8083
    Electronic ISSN: 1432-0983
    Topics: Biology
    Published by Springer
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  • 2
    Electronic Resource
    Electronic Resource
    Promiscuous mitochondrial group II intron sequences in plant nuclear genomes (1994)
    Springer
    Journal of molecular evolution 39 (1994), S. 144-150 
    Details
    ISSN: 1432-1432
    Keywords: Tobacco ; Glycanase genes ; Oxygen-evolving enhancer protein gene ; Sequence transfer ; Endosymbiont theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Gene translocations from the organelles to the nucleus are postulated by the endosymbiont hypothesis. We here report evidence for sequence insertions in the nuclear genomes of plants that are derived from noncoding regions of the mitochondrial genome. Fragments of mitochondrial group II introns are identified in the nuclear genomes of tobacco and a bean species. The duplicated intron sequences of 75–140 bp are derived from cis- and trans-splicing introns of genes encoding subunits 1 and 5 of the NADH dehydrogenase. The mitochondrial sequences are inserted in the vicinities of a lectin gene, different glucanase genes and a gene encoding a subunit of photosystem II. Sequence similarities between the nuclear and mitochondrial copies are in the range of 80 to 97%, suggesting recent transfer events that occurred in the basic glucanase genes before and in the lectin gene after the gene duplications in the evolution of the nuclear gene families. Overlapping regions of the same introns are in two instances also involved in intramitochondrial sequence duplications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00163803
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The gene for ribosomal protein S10 is present in mitochondria of pea and potato but absent from those of Arabidopsis and Oenothera (1995)
    Springer
    Current genetics 27 (1995), S. 559-564 
    Details
    ISSN: 1432-0983
    Keywords: RNA editing ; Group-II intron ; Gene transfer ; Evolution ; tRNA genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00314448
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  • 4
    Electronic Resource
    Electronic Resource
    Interorganellar gene transfer in bryophytes: the functional nad7 gene is nuclear encoded in Marchantia polymorpha (1997)
    Springer
    Molecular genetics and genomics 256 (1997), S. 589-592 
    Details
    ISSN: 1617-4623
    Keywords: Key words Gene transfer ; NADH: ubiquinone oxidoreductase ; Liverwort ; Signal peptide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The nad7 gene, encoding subunit 7 of NADH dehydrogenase, is mitochondrially encoded in seed plants. In the liverwort, Marchantia polymorpha, only a pseudogene is located in the mitochondrial genome. We have now identified the functional nad7 gene copy in the nuclear genome of Marchantia, coding for a polypeptide of 468 amino acids. The nuclear-encoded nad7 has lost the two group II introns present in the mitochondrial pseudogene copy. Instead, a typical nuclear intron is found to split an exon encoding the presumptive mitochondrial targeting signal peptide and the mature subunit 7 of NADH dehydrogenase. These results suggest that RNA-mediated gene transfer from the mitochondrial into the nuclear genome occurs not only in seed plants but also in bryophytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00008616
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  • 5
    Electronic Resource
    Electronic Resource
    A tripartite group II intron in mitochondria of an angiosperm plant (1997)
    Springer
    Molecular genetics and genomics 255 (1997), S. 269-276 
    Details
    ISSN: 1617-4623
    Keywords: Key words Group II introns ; Plant mitochondria ; Arabidopsis ; Oenothera ; Trans-splicing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In mitochondria of flowering plants the nad5 open reading frame is assembled from five exons via two conventional cis-splicing and two trans-splicing events. Trans-splicing between exons c and d in wheat, petunia and Arabidopsis involves a bipartite group II intron structure, while in Oenothera a large portion of intron domains I–IV is missing from the major genomic locus. This intron region has been lost downstream of exon c and is now found in a distant genomic region. Intragenomic recombination across an 11 nucleotide sequence has separated these intron parts, which now have to be reassembled from three independent RNA precursors. This organisation coexists with highly substoichiometric copy numbers of the bipartite intron arrangement, consistent with an evolutionary origin of the tripartite intron by genomic disruption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380050497
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