Dse1 may control cross talk between the pheromone and filamentation pathways in yeast

作者：Draper Edward; Dubrovskyi Oleksii; Bar Eli E; Stone David E^*

来源：Current Genetics, 2009, 55(6): 611-621.

DOI：10.1007/s00294-009-0274-6

• Saccharomyces cerevisiae pheromone response
• Saccharomyces cerevisiae filamentous/invasive growth response
• Dse1
• G beta (Ste4)
• Ste11
• Cross talk

The filamentous/invasive growth pathway is activated by nutrient limitation in the haploid form of the yeast Saccharomyces cerevisiae, whereas exposure to mating-pheromone causes cells to differentiate into gametes. Although these two pathways respond to very different stimuli and generate very different responses, they utilize many of the same signaling components. This implies the need for robust mechanisms to maintain signal fidelity. Dse1 was identified in an allele-specific suppressor screen for proteins that interact with the pheromone-responsive G beta gamma, and found to bind both to a G beta gamma-affinity column, and to the shared MEKK, Ste11. Although overexpression of Dse1 stimulated invasive growth and transcription of both filamentation and mating-specific transcriptional reporters, deletion of DSE1 had no effect on these outputs. In contrast, pheromone hyper-induced transcription of the filamentation reporter in cells lacking Dse1 and in cells expressing a mutant form of G beta that exhibits diminished interaction with Dse1. Thus, the interaction of Dse1 with both G beta and Ste11 may be designed to control cross talk between the pheromone and filamentation pathways.

• 出版日期2009-12