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Nucleotide sequence of the split tRNA LeuUAA gene from Vicia faba chloroplasts: evidence for structural homologies of the chloroplast tRNALeu intron with the intron from the autosplicable Tetrahymena ribosomal RNA precursor

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Summary

The gene encoding the tRNA LeuUAA from broad bean chloroplasts has been located on a 5.1 kbp long BamHI fragment by analysis of the DNA sequence of an XbaI subfragment. This gene is 536 bp long and is split in the anticodon region. The 451 bp long intron shows high sequence homology over about 100 bp from each end with the corresponding regions of the maize chloroplast tRNA LeuUAA intron. These conserved sequences are probably involved in the splicing reaction, for they can be folded into a secondary structure which is very similar to the postulated structure of the intron from the autosplicable ribosomal RNA precursor of Tetrahymena. Very little sequence conservation is found in the 5′-and 3′-flanking regions of the broad bean and maize chloroplast tRNA LeuUAA genes.

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Communicated by J. Schell

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Bonnard, G., Michel, F., Weil, J.H. et al. Nucleotide sequence of the split tRNA LeuUAA gene from Vicia faba chloroplasts: evidence for structural homologies of the chloroplast tRNALeu intron with the intron from the autosplicable Tetrahymena ribosomal RNA precursor. Molec. Gen. Genet. 194, 330–336 (1984). https://doi.org/10.1007/BF00383536

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