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J Gen Microbiol. 1986 Aug;132(8):2087-97.

Nuclear suppressors of the mitochondrial mutation oxi1-V25 in Saccharomyces cerevisiae. Genetic analysis of the suppressors: absence of complementation between non-allelic mutants.


Ten informational nuclear suppressors of the oxi1- mitochondrial mutation of Saccharomyces cerevisiae are recessive. They are linked to each other, but their allelism is uncertain. Some of them unfavourably affect functions of standard (mit+) mitochondrial genomes. One suppressor severely impairs or entirely prevents mitochondrial functions of the spore clones carrying it. The spectrum of mit- mutations on which these suppressors act is similar to that exhibited by nam3-1. In double heterozygotes namx/NAM3+, NAM+x/nam3-1 the oxi1- (and box3-) mutation is suppressed, yet one of our suppressors (R705) and nam3-1 show independent segregation in tetrads. This indicates that there may be absence of complementation between non-allelic suppressors.

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