The Heterotrimeric G-Protein GanB([alpha])-SfaD([beta])-GpgA([gamma]) Is a Carbon Source Sensor Involved in Early cAMP-Dependent Germination in Aspergillus nidulans

From: Genetics | Date: September 1, 2005| Author: | Copyright information

ABSTRACT

The role of heterotrimeric G-proteins in cAMP-dependent germination of conidia was investigated in the filamentous ascomycete Aspergillus nidulans. We demonstrate that the Gα-subunit GanB mediates a rapid and transient activation of cAMP synthesis in response to glucose during the early period of germination. Moreover, deletion of individual G-protein subunits resulted in defective trehalose mobilization and altered germination kinetics, indicating that GanB(α)-SfaD(β)-GpgA(γ) constitutes a functional heterotrimer and controls cAMP/PKA signaling in response to ...

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