4V2W

JMJD2A COMPLEXED WITH NI(II), NOG AND HISTONE H3K27me3 PEPTIDE (16-35)

4V2W の概要

• エントリーDOI: 10.2210/pdb4v2w/pdb
• 関連するPDBエントリー: 4V2V
• 分子名称: LYSINE-SPECIFIC DEMETHYLASE 4A, HISTONE H3.1T, NICKEL (II) ION, ... (8 entities in total)
• 機能のキーワード: jmjd2a, oxidoreductase, non-heme, iron, 2-oxoglutarate, dioxygenase, oxygenase, double-stranded beta helix, dsbh, facial triad, demethylase, histone, jmjc domain, metal binding protein, epigenetic and transcription regulation, chromatin regulator, hydroxylation
• 由来する生物種: HOMO SAPIENS (HUMAN); 詳細
• タンパク質・核酸の鎖数: 3
• 化学式量合計: 91413.37

構造登録者

Chowdhury, R.,Zafred, D.,Schofield, C.J. (登録日: 2014-10-15, 公開日: 2014-11-26, 最終更新日: 2024-01-10)

主引用文献

Williams, S.T.,Walport, L.J.,Hopkinson, R.J.,Madden, S.K.,Chowdhury, R.,Schofield, C.J.,Kawamura, A.
Studies on the Catalytic Domains of Multiple Jmjc Oxygenases Using Peptide Substrates.
Epigenetics, 9:1596-, 2014

PubMed Abstract: The JmjC-domain-containing 2-oxoglutarate-dependent oxygenases catalyze protein hydroxylation and N(ϵ)-methyllysine demethylation via hydroxylation. A subgroup of this family, the JmjC lysine demethylases (JmjC KDMs) are involved in histone modifications at multiple sites. There are conflicting reports as to the substrate selectivity of some JmjC oxygenases with respect to KDM activities. In this study, a panel of modified histone H3 peptides was tested for demethylation against 15 human JmjC-domain-containing proteins. The results largely confirmed known N(ϵ)-methyllysine substrates. However, the purified KDM4 catalytic domains showed greater substrate promiscuity than previously reported (i.e., KDM4A was observed to catalyze demethylation at H3K27 as well as H3K9/K36). Crystallographic analyses revealed that the N(ϵ)-methyllysine of an H3K27me3 peptide binds similarly to N(ϵ)-methyllysines of H3K9me3/H3K36me3 with KDM4A. A subgroup of JmjC proteins known to catalyze hydroxylation did not display demethylation activity. Overall, the results reveal that the catalytic domains of the KDM4 enzymes may be less selective than previously identified. They also draw a distinction between the N(ϵ)-methyllysine demethylation and hydroxylation activities within the JmjC subfamily. These results will be of use to those working on functional studies of the JmjC enzymes.

PubMed: 25625844
DOI: 10.4161/15592294.2014.983381

実験手法

X-RAY DIFFRACTION (1.81 Å)