ジャーナル: Nat Struct Mol Biol / 年: 2013 タイトル: Electron microscopy structure of human APC/C(CDH1)-EMI1 reveals multimodal mechanism of E3 ligase shutdown. 著者: Jeremiah J Frye / Nicholas G Brown / Georg Petzold / Edmond R Watson / Christy R R Grace / Amanda Nourse / Marc A Jarvis / Richard W Kriwacki / Jan-Michael Peters / Holger Stark / Brenda A Schulman / 要旨: The anaphase-promoting complex/cyclosome (APC/C) is a ~1.5-MDa multiprotein E3 ligase enzyme that regulates cell division by promoting timely ubiquitin-mediated proteolysis of key cell-cycle ...The anaphase-promoting complex/cyclosome (APC/C) is a ~1.5-MDa multiprotein E3 ligase enzyme that regulates cell division by promoting timely ubiquitin-mediated proteolysis of key cell-cycle regulatory proteins. Inhibition of human APC/C(CDH1) during interphase by early mitotic inhibitor 1 (EMI1) is essential for accurate coordination of DNA synthesis and mitosis. Here, we report a hybrid structural approach involving NMR, electron microscopy and enzymology, which reveal that EMI1's 143-residue C-terminal domain inhibits multiple APC/C(CDH1) functions. The intrinsically disordered D-box, linker and tail elements, together with a structured zinc-binding domain, bind distinct regions of APC/C(CDH1) to synergistically both block the substrate-binding site and inhibit ubiquitin-chain elongation. The functional importance of intrinsic structural disorder is explained by enabling a small inhibitory domain to bind multiple sites to shut down various functions of a 'molecular machine' nearly 100 times its size.
内容: 0.8 mM [U-100% 13C; U-100% 15N] F-box only protein 5, 90% H2O/10% D2O 溶媒系: 90% H2O/10% D2O
試料
濃度: 0.8 mM / 構成要素: F-box only protein 5 / Isotopic labeling: [U-100% 13C; U-100% 15N]
試料状態
イオン強度: 50 / pH: 7 / 圧: ambient / 温度: 298 K
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NMR測定
NMRスペクトロメーター
タイプ
製造業者
モデル
磁場強度 (MHz)
Spectrometer-ID
Bruker Avance
Bruker
AVANCE
800
1
Bruker Avance
Bruker
AVANCE
600
2
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解析
NMR software
名称
バージョン
開発者
分類
CYANA
2.1
Guntert, MumenthalerandWuthrich
構造決定
CYANA
2.1
Guntert, MumenthalerandWuthrich
精密化
精密化
手法: torsion angle dynamics / ソフトェア番号: 1
NMR constraints
NOE constraints total: 931 / NOE intraresidue total count: 211 / NOE long range total count: 256 / NOE medium range total count: 0 / NOE sequential total count: 83 / Protein chi angle constraints total count: 0 / Protein other angle constraints total count: 0 / Protein phi angle constraints total count: 19 / Protein psi angle constraints total count: 19
代表構造
選択基準: lowest energy
NMRアンサンブル
Average torsion angle constraint violation: 0.1997 ° / コンフォーマー選択の基準: target function / 計算したコンフォーマーの数: 100 / 登録したコンフォーマーの数: 20 / Maximum lower distance constraint violation: 0.0093 Å / Maximum torsion angle constraint violation: 0.86 ° / Maximum upper distance constraint violation: 0.21 Å / Torsion angle constraint violation method: Talos program
NMR ensemble rms
Distance rms dev: 0.046 Å / Distance rms dev error: 0.004 Å