2OQ6

Crystal structure of JMJD2A complexed with histone H3 peptide trimethylated at Lys9

2OQ6 の概要

• エントリーDOI: 10.2210/pdb2oq6/pdb
• 関連するPDBエントリー: 2OQ7 2OS2 2OT7 2OX0
• 分子名称: JmjC domain-containing histone demethylation protein 3A, synthetic peptide, NICKEL (II) ION, ... (6 entities in total)
• 機能のキーワード: double-stranded beta helix, demethylase, oxygenase, sgc, structural genomics, structural genomics consortium, oxidoreductase
• 由来する生物種: Homo sapiens (human); 詳細
• 細胞内の位置: Nucleus: O75164
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 90975.00

構造登録者

Pilka, E.S.,Ng, S.S.,Kavanagh, K.L.,McDonough, M.A.,Savitsky, P.,von Delft, F.,Arrowsmith, C.H.,Weigelt, J.,Edwards, A.,Sundstrom, M.,Schofield, C.J.,Oppermann, U.,Structural Genomics Consortium (SGC) (登録日: 2007-01-31, 公開日: 2007-03-13, 最終更新日: 2023-12-27)

主引用文献

Ng, S.S.,Kavanagh, K.L.,McDonough, M.A.,Butler, D.,Pilka, E.S.,Lienard, B.M.,Bray, J.E.,Savitsky, P.,Gileadi, O.,von Delft, F.,Rose, N.R.,Offer, J.,Scheinost, J.C.,Borowski, T.,Sundstrom, M.,Schofield, C.J.,Oppermann, U.
Crystal structures of histone demethylase JMJD2A reveal basis for substrate specificity.
Nature, 448:87-91, 2007

PubMed Abstract: Post-translational histone modification has a fundamental role in chromatin biology and is proposed to constitute a 'histone code' in epigenetic regulation. Differential methylation of histone H3 and H4 lysyl residues regulates processes including heterochromatin formation, X-chromosome inactivation, genome imprinting, DNA repair and transcriptional regulation. The discovery of lysyl demethylases using flavin (amine oxidases) or Fe(II) and 2-oxoglutarate as cofactors (2OG oxygenases) has changed the view of methylation as a stable epigenetic marker. However, little is known about how the demethylases are selective for particular lysyl-containing sequences in specific methylation states, a key to understanding their functions. Here we reveal how human JMJD2A (jumonji domain containing 2A), which is selective towards tri- and dimethylated histone H3 lysyl residues 9 and 36 (H3K9me3/me2 and H3K36me3/me2), discriminates between methylation states and achieves sequence selectivity for H3K9. We report structures of JMJD2A-Ni(II)-Zn(II) inhibitor complexes bound to tri-, di- and monomethyl forms of H3K9 and the trimethyl form of H3K36. The structures reveal a lysyl-binding pocket in which substrates are bound in distinct bent conformations involving the Zn-binding site. We propose a mechanism for achieving methylation state selectivity involving the orientation of the substrate methyl groups towards a ferryl intermediate. The results suggest distinct recognition mechanisms in different demethylase subfamilies and provide a starting point to develop chemical tools for drug discovery and to study and dissect the complexity of reversible histone methylation and its role in chromatin biology.

PubMed: 17589501
DOI: 10.1038/nature05971

実験手法

X-RAY DIFFRACTION (2 Å)