Abstract
Rhodotorucine A, a lipopeptide mating pheromone, is secreted from mating type A cells of Rhodosporidium toruloides and induces sexual differentiation of the opposite mating type a cells. Genome of A-type cells contains three homologous genes (RHA1, RHA2, and RHA3) encoding rhodotorucine A. Genomic Southern blot analysis using RHA1 DNA as a probe showed that RHA1 strongly hybridize with A-type genomic DNA but weakly with a-type, suggesting that the sequences of RHA genes were dissimilar in the opposite a-type genome. The range of dissimilar regions in a-type genome was searched using RHA-flanking DNA segments as probes. The result suggests that a-type genome lacks sequences coding for rhodotorucine A and its 5′ upstream but contains its 3′ non-coding sequences. The absence of mating pheromone genes in the opposite mating type genome suggests that the expression of mating-type-specific genes in R. toruloides is not controlled trans-criptionally, as shown in the yeast Saccharomyces cerevisiae.
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Akada, R., Kai, J., Yamashita, I. et al. Genomic organization of multiple genes coding for rhodotorucine A, a lipopeptide mating pheromone of the basidiomycetous yeast Rhodosporidium toruloides . Arch. Microbiol. 152, 484–487 (1989). https://doi.org/10.1007/BF00446934
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DOI: https://doi.org/10.1007/BF00446934