By Prof. Dr. Walter Eschrich (auth.), K. Esser, U. Lüttge, J. W. Kadereit, W. Beyschlag (eds.)
With one quantity every year, this sequence retains scientists and complex scholars educated of the newest advancements and ends up in all parts of the plant sciences.
The current quantity contains studies on genetics, mobilephone biology, body structure, comparative morphology, systematics, ecology and plants science.
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Additional info for Progress in Botany: Genetics Physiology Systematics Ecology
Example text
1994). All new integration sites are preceded by an IBS-like motif, thus indicating an RNA-mediated transposition pathway. This data shows that transposition follows a pathway at least slightly different from homing, leading to a duplication of the intron separated by genomic sequences of different lengths. Homologous recombination between the two intron copies finally results in the formation of sub-genomic circles. Therefore, mobile group-II introns increase the instability of mtDNA. It was initially presumed that the intron lariat is able to reverse splice into transcripts with a sufficient IBS-like motif (Fig.
Acknowledgements. We thank Dr. Udo Schmidt for critical comments on the manuscript and Roslin Bensman for her careful help with the English. Introns, Splicing and Mobility 29 References Arlt H, Steglich G, Perryman R, Guiard B, Neupert W, Langer T (1998) The formation of respiratory chain complexes in mitochondria is under the proteolytic control of the m-AAA protease. EMBO J 17:4837-4847 Atkin AL, Altamura N, Leeds P, Culbertson MR (1995) The majority of yeast UPFI colocalizes with polyribosomes in the cytoplasm.
Mitochondrial biogenesis, mitochondrial import, assembly). It has even been suggested that their participation in splicing was acquired secondarily (Lambowitz and Perlman 1990, 1999). In yeast and bacteria, the intron-encoded maturase activity appears to be highly specific for its own intron (Moran et al. 1994; Saldanha et al. 1999); however, the situation seems to be different in the plastids of higher plants. Chloroplasts of higher plants contain up to 20 group-II introns. However, only the intron within the tnrK gene coding for 22 Genetics transfer RNA LysuUU contains the only chloroplast reading frame with homology to maturase-like proteins of group-II introns (Neuhaus and Link 1987).