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Publication Abstract from PubMed

The Schizosaccharomyces pombe Clr6S complex, a class I histone deacetylase complex, functions as a zinc-dependent enzyme to remove acetyl groups from lysine residues in histone tails. We report here the cryo-EM structure of Clr6S alone and a cryo-EM map of Clr6S in complex with a nucleosome. The active center, revealed at near-atomic resolution, includes features important for catalysis-A water molecule coordinated by zinc, the likely nucleophile for attack on the acetyl-lysine bond, and a loop that may position the substrate for catalysis. The cryo-EM map in the presence of a nucleosome reveals multiple Clr6S-nucleosome contacts and a high degree of relative motion of Clr6S and the nucleosome. Such flexibility may be attributed to interaction at a site in the flexible histone tail and is likely important for the function of the deacetylase, which acts at multiple sites in other histone tails.

Class I histone deacetylase complex: Structure and functional correlates.,Wang X, Wang Y, Liu S, Zhang Y, Xu K, Ji L, Kornberg RD, Zhang H Proc Natl Acad Sci U S A. 2023 Jul 25;120(30):e2307598120. doi: , 10.1073/pnas.2307598120. Epub 2023 Jul 17. PMID:37459529^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.