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KMID : 0613819970070040322
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Journal of Life Science
1997 Volume.7 No. 4 p.322 ~ p.328
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Mating-type-specific inhibition of phosphorylation by sexual pheromone (Rh. A) on heterobasidiomycetous yeast Rhodosporidium toruloides.
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Abstract
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Two phosphorylated proteins having molecular weights of 57kD and 72kD were detected from the slubilized membrane protein fraction of mating type a cells of Rhodosporidium toruloides which belongs to heterobasidiomycetous yeast. The phosphorylation of the protein was inhibited by a sexual pheromone, Rhodotorucine A (Rh. A), which is secreted from mating type a cells. On the other hand, counterpart mating type A cells and M-39 strain which is a styerile mutant derived from a cells, had also the same two phosphorylated proteins, However, the phosphorylation of the protein from A cells, and M-39 strain were not inhibited by the Rh. A. It suggests that inhibition of the phosphorylation reaction by the Rh. A in mating type a cells is a mating-type-specific reaction that relate to transduction mechanism of sexual pheromone signaling
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