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A phospho-regulated ensemble signal motif of α-TAT1 drives dynamic microtubule acetylation

Abstract : Spatiotemporal patterns of microtubule modifications such as acetylation underlie diverse cellular functions. While the molecular identity of the acetylating agent, α-tubulin N-acetyltransferase 1 (α-TAT1), as well as the functional consequences of microtubule acetylation have been revealed, the molecular mechanisms that regulate multi-tasking α-TAT1 action for dynamic acetylation remain obscure. Here we identified a signal motif in the intrinsically disordered C-terminus of α-TAT1, which comprises three functional elements - nuclear export, nuclear import and cytosolic retention. Their balance is tuned via phosphorylation by serine-threonine kinases to determine subcellular localization of α-TAT1. While the phosphorylated form binds to 14-3-3 adapters and accumulates in the cytosol for maximal substrate access, the non-phosphorylated form is sequestered inside the nucleus, thus keeping microtubule acetylation minimal. As cancer mutations have been reported to this motif, the unique ensemble regulation of α-TAT1 localization may hint at a role of microtubule acetylation in aberrant physiological conditions.
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Preprints, Working Papers, ...
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https://hal-pasteur.archives-ouvertes.fr/pasteur-03096546
Contributor : Marie Lemesle <>
Submitted on : Tuesday, January 5, 2021 - 8:39:06 AM
Last modification on : Friday, January 8, 2021 - 3:27:23 AM
Long-term archiving on: : Wednesday, April 7, 2021 - 9:20:53 AM

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Abhijit Deb Roy, Evan Gross, Gayatri Pillai, Shailaja Seetharaman, Sandrine Etienne-Manneville, et al.. A phospho-regulated ensemble signal motif of α-TAT1 drives dynamic microtubule acetylation. 2021. ⟨pasteur-03096546⟩

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