National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
T32GM119999
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM133498
米国
National Institutes of Health/National Cancer Institute (NIH/NCI)
F99CA253730
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM139514
米国
National Institutes of Health/National Cancer Institute (NIH/NCI)
R01CA010305
米国
引用
ジャーナル: Nat Chem Biol / 年: 2023 タイトル: Structural basis of paralog-specific KDM2A/B nucleosome recognition. 著者: Cathy J Spangler / Aleksandra Skrajna / Caroline A Foley / Anh Nguyen / Gabrielle R Budziszewski / Dalal N Azzam / Eyla C Arteaga / Holly C Simmons / Charlotte B Smith / Nathaniel A Wesley / ...著者: Cathy J Spangler / Aleksandra Skrajna / Caroline A Foley / Anh Nguyen / Gabrielle R Budziszewski / Dalal N Azzam / Eyla C Arteaga / Holly C Simmons / Charlotte B Smith / Nathaniel A Wesley / Emily M Wilkerson / Jeanne-Marie E McPherson / Dmitri Kireev / Lindsey I James / Stephen V Frye / Dennis Goldfarb / Robert K McGinty / 要旨: The nucleosome acidic patch is a major interaction hub for chromatin, providing a platform for enzymes to dock and orient for nucleosome-targeted activities. To define the molecular basis of acidic ...The nucleosome acidic patch is a major interaction hub for chromatin, providing a platform for enzymes to dock and orient for nucleosome-targeted activities. To define the molecular basis of acidic patch recognition proteome wide, we performed an amino acid resolution acidic patch interactome screen. We discovered that the histone H3 lysine 36 (H3K36) demethylase KDM2A, but not its closely related paralog, KDM2B, requires the acidic patch for nucleosome binding. Despite fundamental roles in transcriptional repression in health and disease, the molecular mechanisms governing nucleosome substrate specificity of KDM2A/B, or any related JumonjiC (JmjC) domain lysine demethylase, remain unclear. We used a covalent conjugate between H3K36 and a demethylase inhibitor to solve cryogenic electron microscopy structures of KDM2A and KDM2B trapped in action on a nucleosome substrate. Our structures show that KDM2-nucleosome binding is paralog specific and facilitated by dynamic nucleosomal DNA unwrapping and histone charge shielding that mobilize the H3K36 sequence for demethylation.
解像度: 1.98→88.09 Å / Cor.coef. Fo:Fc: 0.966 / Cor.coef. Fo:Fc free: 0.94 / SU B: 4.623 / SU ML: 0.128 / 交差検証法: THROUGHOUT / ESU R: 0.191 / ESU R Free: 0.173 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD / 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
Rfactor
反射数
%反射
Selection details
Rfree
0.23701
2914
5 %
RANDOM
Rwork
0.18285
-
-
-
obs
0.18552
55260
97.42 %
-
溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK