Nuclear Magnetic Resonance Analysis of the Acetylation Pattern of the Neuronal Tau Protein

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Abstract

Lysine acetylation of the neuronal Tau protein was described as a novel mechanism of posttranslational regulation of Tau functions with important outcomes in microtubule binding and aggregation processes related to Alzheimer's disease. Here, we unravel at a per-residue resolution the acetylation pattern of full-length Tau by the Creb-binding protein (CBP) acetyltransferase using high-resolution nuclear magnetic resonance spectroscopy. Our study gives a quantitative overview of CBP-mediated acetylation and examines the catalytic proficiency because the nonenzymatic reaction with acetyl-coenzyme A occurs in vitro. Furthermore, we have investigated with this characterized acetylated Tau the effect of acetylation on Tau fibrillization in a heparin-induced aggregation assay and on heparin binding.

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