Abstract
Heterotrimeric G proteins have traditionally been thought to transduce signals at the plasma membrane. In this issue, Slessareva et al. (2006) now show that a G protein alpha subunit acts at the endosome to stimulate a phosphatidylinositol 3-kinase to help yeast respond to mating pheromones.
MeSH terms
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Cell Membrane / genetics
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Cell Membrane / metabolism
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Endosomes / genetics
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Endosomes / metabolism*
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Heterotrimeric GTP-Binding Proteins / genetics
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Heterotrimeric GTP-Binding Proteins / metabolism*
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Models, Biological
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Phosphatidylinositol 3-Kinases / metabolism*
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Protein Binding / physiology
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Reproduction, Asexual / physiology
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Saccharomyces cerevisiae / genetics*
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Sex Attractants / metabolism
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Signal Transduction / physiology*
Substances
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Sex Attractants
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Heterotrimeric GTP-Binding Proteins