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Young BP, et al.  (2010) Phosphatidic acid is a pH biosensor that links membrane biogenesis to metabolism. Science 329(5995):1085-8

Abstract: Recognition of lipids by proteins is important for their targeting and activation in many signaling pathways, but the mechanisms that regulate such interactions are largely unknown. Here, we found that binding of proteins to the ubiquitous signaling lipid phosphatidic acid (PA) depended on intracellular pH and the protonation state of its phosphate headgroup. In yeast, a rapid decrease in intracellular pH in response to glucose starvation regulated binding of PA to a transcription factor, Opi1, that coordinately repressed phospholipid metabolic genes. This enabled coupling of membrane biogenesis to nutrient availability.

Status: Published Type: Journal Article | Research Support, N.I.H., Intramural | Research Support, Non-U.S. Gov't PubMed ID: 20798321

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INO1 INO2 INO4 OPI1 PMA1 REG1 SCS2 SPO20 TRK1 VMA2
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