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Nucleic Acids Res. 1989 Jun 26;17(12):4535-9.

Substitution of an invariant nucleotide at the base of the highly conserved '530-loop' of 15S rRNA causes suppression of yeast mitochondrial ochre mutations.

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  • 1Section of Genetics and Development, Cornell University, Ithaca, NY 14853-2703.

Abstract

We have determined the nucleotide sequence alteration in the 15S rRNA gene of a Saccharomyces cerevisiae strain carrying the previously described mitochondrial ochre suppressor, MSUI. The suppressor contains an A residue at position 633 of the yeast mitochondrial sequence, in place of the wild-type G. This position, located in the highly conserved region forming the stem of the '530-loop', corresponds to G517 of the Escherichia coli 16S rRNA and is occupied by G in all other known small rRNA sequences. This finding strongly supports the previous conclusions of others that the 530-loop region plays an important role in enhancing translational accuracy.

PMID:
2473436
[PubMed - indexed for MEDLINE]
PMCID:
PMC318012
Free PMC Article
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