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Hum Mol Genet. 2006 Oct 15;15(20):3012-23. Epub 2006 Sep 7.

Alpha-synuclein acts in the nucleus to inhibit histone acetylation and promote neurotoxicity.

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  • 1Department of Pathology, Brigham and Women's Hospital, Program in Neuroscience, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA 02115, USA.

Abstract

Alpha-synuclein is a neuronal protein implicated genetically in Parkinson's disease. alpha-synuclein localizes to the nucleus and presynaptic nerve terminals. Here we show that alpha-synuclein mediates neurotoxicity in the nucleus. Targeting of alpha-synuclein to the nucleus promotes toxicity, whereas cytoplasmic sequestration is protective in both cell culture and transgenic Drosophila. Toxicity of alpha-synuclein can be rescued by administration of histone deacetylase inhibitors in both cell culture and transgenic flies. Alpha-synuclein binds directly to histones, reduces the level of acetylated histone H3 in cultured cells and inhibits acetylation in histone acetyltransferase assays. Alpha-synuclein mutations that cause familial Parkinson's disease, A30P and A53T, exhibit increased nuclear targeting in cell culture. These findings implicate nuclear alpha-synuclein in promoting nigrostriatal degeneration in Parkinson's disease and encourage exploration of histone deacetylase inhibitors as potential therapies for the disorder.

PMID:
16959795
[PubMed - indexed for MEDLINE]
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