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The chloroplast tRNALys(UUU) gene from mustard (Sinapis alba) contains a class II intron potentially coding for a maturase-related polypeptide

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Summary

The trnK gene endocing the tRNALys (UUU) has been located on mustard (Sinapis alba) chloroplast DNA, 263 by upstream of the psbA gene on the same strand. The nucleotide sequence of the trnK gene and its flanking regions as well as the putative transcription start and termination sites are shown. The 5′ end of the transcript lies 121 by upstream of the 5′ tRNA coding region and is preceded by procaryotic-type “−10” and “−35” sequence elements, while the 3′ end maps 2.77 kb downstream to a DNA region with possible stem-loop secondary structure. The anticodon loop of the tRNALys is interrupted by a 2,574 by intron containing a long open reading frame, which codes for 524 amino acids. Based on conserved stem and loop structures, this intron has characteristic features of a class II intron. A region near the carboxyl terminus of the derived polypeptide appears structurally related to maturases.

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Abbreviations

bp:

base pairs

psbA:

gene coding for the Mr 32,000 herbicide binding photosystem II protein

COI:

cytochrome c oxidase subunit I

trnK:

gene coding for chloroplast tRNALys

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Authors and Affiliations

  1. Arbeitsgruppe Pflanzliche Zellphysiologie, Ruhr-Universität Bochum, Universitätsstrasse 150, D-4630, Bochum, Germany

    Heike Neuhaus & Gerhard Link

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  1. Heike Neuhaus
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Neuhaus, H., Link, G. The chloroplast tRNALys(UUU) gene from mustard (Sinapis alba) contains a class II intron potentially coding for a maturase-related polypeptide. Curr Genet 11, 251–257 (1987). https://doi.org/10.1007/BF00355398

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  • DOI: https://doi.org/10.1007/BF00355398

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