Nucleotide sequences of yeast genes for tRNA(2), tRNA(2) and tRNA(1): homology blocks occur in the vicinity of different tRNA genes
- PMID: 16453416
- PMCID: PMC553037
- DOI: 10.1002/j.1460-2075.1982.tb01162.x
Nucleotide sequences of yeast genes for tRNA(2), tRNA(2) and tRNA(1): homology blocks occur in the vicinity of different tRNA genes
Abstract
Three members of a collection of pBR322-yeast DNA recombinant plasmids containing yeast tRNA genes have been analyzed and sequenced. Each plasmid carries a single tRNA gene: pY44, tRNA(2); pY41, tRNA(2); pY7, tRNA(1). All three genes are intronless and terminate in a cluster of Ts in the non-coding strand. The sequence information here and previously determined sequences allow an extensive comparison of the regions flanking several yeast tRNA genes. This analysis has revealed novel features in tRNA gene arrangement. Blocks of homology in the flanking regions were found between the tRNA genes of an isoacceptor family but, more interestingly, also between genes coding for tRNAs of different amino-acid specificities. Particularly, three examples are discussed in which sequence elements in the neighborhood of different tRNA genes have been conserved to a high degree and over long distances.
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