PMID: 30156264

Authors:

Walport LJ, Hopkinson RJ, Chowdhury R, Zhang Y, Bonnici J, Schiller R, Kawamura A, Schofield CJ

Title:

Mechanistic and Structural Studies of KDM-Catalysed Demethylation of Histone 1 Isotype 4 at Lysine 26.

Journal:

FEBS Lett. 2018 Aug 29. doi: 10.1002/1873-3468.13231.

Abstract:

N-Methylation of lysyl residues is widely observed on histone proteins. Using isolated enzymes, we report mechanistic and structural studies on histone lysine demethylase (KDM)-catalysed demethylation of N(epsilon) -methylated lysine 26 on histone 1 isotype 4 (H1.4). The results reveal that methylated H1.4K26 is a substrate for all members of the KDM4 subfamily and that KDM4A-catalysed demethylation of H1.4K26me3 peptide is similarly efficient to that of H3K9me3. Crystallographic studies of an H1.4K26me3:KDM4A complex reveal a conserved binding geometry to that of H3K9me3. In light of the high activity of the KDM4s on this mark, our results suggest JmjC KDM-catalysed demethylation of H1.4K26 may be as prevalent as demethylation on the H3 tail and warrants further investigation in cells. This article is protected by copyright. All rights reserved.