UNIGE document Scientific Article
previous document  unige:1885  next document
add to browser collection

Control of cellular physiology by TM9 proteins in yeast and Dictyostelium

Birke, Raphael
Letourneur, François
Mösch, Hans-Ulrich
show hidden authors show all authors [1 - 9]
Published in Journal of Biological Chemistry. 2008, vol. 283, no. 11, p. 6764-72
Abstract TM9 proteins constitute a well defined family, characterized by the presence of a large variable extracellular domain and nine putative transmembrane domains. This family is highly conserved throughout evolution and comprises three members in Dictyostelium discoideum and Saccharomyces cerevisiae and four in humans and mice. In Dictyostelium, previous analysis demonstrated that TM9 proteins are implicated in cellular adhesion. In this study, we generated TM9 mutants in S. cerevisiae and analyzed their phenotype with particular attention to cellular adhesion. S. cerevisiae strains lacking any one of the three TM9 proteins were severely suppressed for adhesive growth and filamentous growth under conditions of nitrogen starvation. In these mutants, expression of the FLO11-lacZ reporter gene was strongly reduced, whereas expression of FRE(Ty1)-lacZ was not, suggesting that TM9 proteins are implicated at a late stage of nutrient-controlled signaling pathways. We also reexamined the phenotype of Dictyostelium TM9 mutant cells, focusing on nutrient-controlled cellular functions. Although the initiation of multicellular development and autophagy was unaltered in Dictyostelium TM9 mutants, nutrient-controlled secretion of lysosomal enzymes was dysregulated in these cells. These results suggest that in both yeast and amoebae, TM9 proteins participate in the control of specific cellular functions in response to changing nutrient conditions.
Keywords AnimalsAutophagyCell AdhesionDictyostelium/metabolismFungal Proteins/genetics/metabolism/physiologyGene Expression RegulationGene Expression Regulation, FungalLysosomes/metabolismMembrane Proteins/genetics/physiologyModels, BiologicalMutationPlasmids/metabolismSaccharomyces cerevisiae/metabolismSignal TransductionSpecies Specificity
PMID: 18178563
Full text
Article (Author postprint) (742 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Supplemental data - I (382 Kb) - public document Free access
Supplemental data - II (7 Kb) - public document Free access
Other version: http://www.jbc.org/cgi/content/full/283/11/6764
Research group Phagocytose (140)
(ISO format)
FROQUET, Romain Bruno et al. Control of cellular physiology by TM9 proteins in yeast and Dictyostelium. In: Journal of Biological Chemistry, 2008, vol. 283, n° 11, p. 6764-72. https://archive-ouverte.unige.ch/unige:1885

129 hits



Deposited on : 2009-06-04

Export document
Format :
Citation style :