Abstract：
: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 Gbetagamma, and found to bind both to a Gbetagamma-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 Gbeta that exhibits diminished interaction with Dse1. Thus, the interaction of Dse1 with both Gbeta and Ste11 may be designed to control cross talk between the pheromone and filamentation pathways.
journal_name
Curr Genetjournal_title
Current geneticsauthors
Draper E,Dubrovskyi O,Bar EE,Stone DEdoi
10.1007/s00294-009-0274-6subject
Has Abstractpub_date
2009-12-01 00:00:00pages
611-21issue
6eissn
0172-8083issn
1432-0983journal_volume
55pub_type
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