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Curr Opin Struct Biol. 2011 Dec;21(6):750-60. doi: 10.1016/j.sbi.2011.08.003. Epub 2011 Aug 25.

Coordinated methyl-lysine erasure: structural and functional linkage of a Jumonji demethylase domain and a reader domain.

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  • 1Department of Biochemistry, Emory University School of Medicine, 1510 Clifton Road, Atlanta, GA 30322, USA.

Abstract

Both components of chromatin (DNA and histones) are subjected to dynamic postsynthetic covalent modifications. Dynamic histone lysine methylation involves the activities of modifying enzymes (writers), enzymes removing modifications (erasers), and readers of the epigenetic code. Known histone lysine demethylases include flavin-dependent monoamine oxidase lysine-specific demethylase 1 and α-ketoglutarate-Fe(II)-dependent dioxygenases containing Jumonji domains. Importantly, the Jumonji domain often associates with at least one additional recognizable domain (reader) within the same polypeptide that detects the methylation status of histones and/or DNA. Here, we summarize recent developments in characterizing structural and functional properties of various histone lysine demethylases, with emphasis on a mechanism of crosstalk between a Jumonji domain and its associated reader module(s). We further discuss the role of recently identified Tet1 enzyme in oxidizing 5-methylcytosine to 5-hydroxymethylcytosine in DNA.

Copyright © 2011 Elsevier Ltd. All rights reserved.

PMID:
21872465
[PubMed - indexed for MEDLINE]
PMCID:
PMC3232282
Free PMC Article

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