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. 1984 Mar 12;12(5):2367–2379. doi: 10.1093/nar/12.5.2367

A cluster of six tRNA genes in Drosophila mitochondrial DNA that includes a gene for an unusual tRNAserAGY.

D O Clary, D R Wolstenholme
PMCID: PMC318668  PMID: 6324117

Abstract

Genes for URF3, tRNAala, tRNAarg, tRNAasn, tRNAserAGY, tRNAglu, tRNAphe, and the carboxyl terminal segment of the URF5 gene have been identified within a sequenced segment of the mtDNA molecule of Drosophila yakuba. The genes occur in the order given. The URF5 and tRNAphe genes are transcribed in the same direction as replication while the URF3 and remaining five tRNA genes are transcribed in the opposite direction. Considerable differences exist in the relative arrangement of these genes in D. yakuba and mammalian mtDNA molecules. In the tRNAserAGY gene an eleven nucleotide loop, within which secondary structure formation seems unlikely, replaces the dihydrouridine arm, and both the variable loop (six nucleotides) and the T phi C loop (nine nucleotides) are larger than in any other D. yakuba tRNA gene. As available evidence is consistent with AGA codons specifying serine rather than arginine in the Drosophila mitochondrial genetic code, the possibility is considered that the 5'GCU anticodon of the D. yakuba tRNAserAGY gene can recognize AGA as well as AGY codons.

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Selected References

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