FRAMESHIFT SUPPRESSION IN SACCHAROMYCES CEREVISIAE VI. COMPLETE GENETIC MAP OF TWENTY-FIVE SUPPRESSOR GENES

Richard F. Gaber ¹, Lorilee Mathison ¹, Irv Edelman ¹, and Michael R. Culbertson ¹

¹ Laboratory of Molecular Biology, University of Wisconsin, Madison, Wisconsin 53706

Five previously unmapped frameshift suppressor genes have been located on the yeast genetic map. In addition, we have further characterized the map positions of two suppressors whose approximate locations were determined in an earlier study. These results represent the completion of genetic mapping studies on all 25 of the known frameshift suppressor genes in yeast.—The approximate location of each suppressor gene was initially determined through the use of a set of mapping strains containing 61 signal markers distributed throughout the yeast genome. Standard meiotic linkage was assayed in crosses between strains carrying the suppressors and the mapping strains. Subsequent to these approximate linkage determinations, each suppressor gene was more precisely located in multi-point crosses. The implications of these mapping results for the genomic distribution of frameshift suppressor genes, which include both glycine and proline tRNA genes, are discussed.

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