4Z66

Nucleosome disassembly by RSC and SWI/SNF is enhanced by H3 acetylation near the nucleosome dyad axis

4Z66 の概要

• エントリーDOI: 10.2210/pdb4z66/pdb
• 分子名称: Histone H3.2, Histone H4, Histone H2A, ... (7 entities in total)
• 機能のキーワード: dyad axis, structural protein-dna complex, structural protein/dna
• 由来する生物種: Xenopus laevis (African clawed frog); 詳細
• 細胞内の位置: Nucleus: P84233 P62799 P02281
• タンパク質・核酸の鎖数: 10
• 化学式量合計: 176779.18

構造登録者

Dechassa, M.L.,Luger, K.,Chatterjee, N.,North, J.A.,Manohar, M.,Prasad, R.,Ottessen, J.J.,Poirier, M.G.,Bartholomew, B. (登録日: 2015-04-03, 公開日: 2015-10-14, 最終更新日: 2024-10-23)

主引用文献

Chatterjee, N.,North, J.A.,Dechassa, M.L.,Manohar, M.,Prasad, R.,Luger, K.,Ottesen, J.J.,Poirier, M.G.,Bartholomew, B.
Histone Acetylation near the Nucleosome Dyad Axis Enhances Nucleosome Disassembly by RSC and SWI/SNF.
Mol.Cell.Biol., 35:4083-4092, 2015

PubMed Abstract: Signaling associated with transcription activation occurs through posttranslational modification of histones and is best exemplified by lysine acetylation. Lysines are acetylated in histone tails and the core domain/lateral surface of histone octamers. While acetylated lysines in histone tails are frequently recognized by other factors referred to as "readers," which promote transcription, the mechanistic role of the modifications in the lateral surface of the histone octamer remains unclear. By using X-ray crystallography, we found that acetylated lysines 115 and 122 in histone H3 are solvent accessible, but in biochemical assays they appear not to interact with the bromodomains of SWI/SNF and RSC to enhance recruitment or nucleosome mobilization, as previously shown for acetylated lysines in H3 histone tails. Instead, we found that acetylation of lysines 115 and 122 increases the predisposition of nucleosomes for disassembly by SWI/SNF and RSC up to 7-fold, independent of bromodomains, and only in conjunction with contiguous nucleosomes. Thus, in combination with SWI/SNF and RSC, acetylation of lateral surface lysines in the histone octamer serves as a crucial regulator of nucleosomal dynamics distinct from the histone code readers and writers.

PubMed: 26416878
DOI: 10.1128/MCB.00441-15

実験手法

X-RAY DIFFRACTION (2.5 Å)