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Background: Tubulin acetylation is a hallmark of microtubule stabilization, which may modulate the binding of microtubule-associated proteins. Results: Microtubules are hyperacetylated because of stress-induced cellular signaling upstream of the tubulin acetyltransferase MEC-17/␣TAT1. Conclusion: MEC-17/␣TAT1 is regulated by p300, reactive oxygen species, and AMP-activated protein kinase. Significance: Microtubule hyperacetylation is important for cell adaptation to stress through autophagy induction and for cell survival.

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