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Tobacco chloroplast tRNA(UUU) gene contains a 2.5-kilobase-pair intron: An open reading frame and a conserved boundary sequence in the intron



Tobacco chloroplast tRNA(UUU) gene contains a 2.5-kilobase-pair intron: An open reading frame and a conserved boundary sequence in the intron



Proceedings of the National Academy of Sciences of the United States of America 82(11): 3557-3561



The nucleotide sequence of a tRNA(Lys)(UUU) gene on tobacco (Nicotiana tabacum) chloroplast DNA has been determined. This gene is located 215 base pairs upstream from the gene for the 32,000-dalton thylakoid membrane protein on the same DNA strand and has a 2526-base-pair intron in the anticodon loop. The intron boundary sequence does not follow the G-U/A-G rule but is similar to those of tobacco chloroplast split genes for tRNA(Gly)(UCC) and ribosomal proteins L2 and S12. The intron contains one major open reading frame of 509 codons. The codon usage in the open reading frame resembles those observed in the genes for tobacco chloroplast proteins so far analyzed. The primary transcript of this tRNA gene is 2.7 kilobases long.

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Accession: 050799492

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PMID: 16593561


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