6NQA

Active state Dot1L bound to the H2B-Ubiquitinated nucleosome, 1-to-1 complex

6NQA の概要

• エントリーDOI: 10.2210/pdb6nqa/pdb
• EMDBエントリー: 0468 0480 9384
• 分子名称: 601 DNA Strand 1, 601 DNA Strand 2, Histone H4, ... (9 entities in total)
• 機能のキーワード: ubiquitin, nucleosome, methyltransferase, structural protein-transferase-dna complex, structural protein/transferase/dna
• 由来する生物種: synthetic construct; 詳細
• タンパク質・核酸の鎖数: 12
• 化学式量合計: 254982.29

構造登録者

Worden, E.J.,Hoffmann, N.A.,Wolberger, C. (登録日: 2019-01-19, 公開日: 2019-02-20, 最終更新日: 2024-10-16)

主引用文献

Worden, E.J.,Hoffmann, N.A.,Hicks, C.W.,Wolberger, C.
Mechanism of Cross-talk between H2B Ubiquitination and H3 Methylation by Dot1L.
Cell, 176:1490-1501.e12, 2019

PubMed Abstract: Methylation of histone H3 K79 by Dot1L is a hallmark of actively transcribed genes that depends on monoubiquitination of H2B K120 (H2B-Ub) and is an example of histone modification cross-talk that is conserved from yeast to humans. We report here cryo-EM structures of Dot1L bound to ubiquitinated nucleosome that show how H2B-Ub stimulates Dot1L activity and reveal a role for the histone H4 tail in positioning Dot1L. We find that contacts mediated by Dot1L and the H4 tail induce a conformational change in the globular core of histone H3 that reorients K79 from an inaccessible position, thus enabling this side chain to insert into the active site in a position primed for catalysis. Our study provides a comprehensive mechanism of cross-talk between histone ubiquitination and methylation and reveals structural plasticity in histones that makes it possible for histone-modifying enzymes to access residues within the nucleosome core.

PubMed: 30765112
DOI: 10.1016/j.cell.2019.02.002

実験手法

ELECTRON MICROSCOPY (3.54 Å)