- EMDB-7294: Cryo-EM Structure of Hepatitis B virus T=4 capsid in complex with... -
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基本情報
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データベース: EMDB / ID: EMD-7294
タイトル
Cryo-EM Structure of Hepatitis B virus T=4 capsid in complex with the fluorescent allosteric modulator HAP-TAMRA
マップデータ
A Hepatitis B virus capsid with T=4 symmetry, bound to HAP-TAMRA. HAP-TAMRA is a fluorescent probe derived from the Heteroaryldihydropyrimidine (HAP) class of capsid-directed antivirals.
試料
Hepatitis B virus T=4 capsid != Hepatitis B virus genotype D subtype adw
Hepatitis B virus T=4 capsid
ウイルス: Hepatitis B virus genotype D subtype adw (ウイルス)
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI067417
米国
引用
ジャーナル: Elife / 年: 2018 タイトル: Hepatitis B virus core protein allosteric modulators can distort and disrupt intact capsids. 著者: Christopher John Schlicksup / Joseph Che-Yen Wang / Samson Francis / Balasubramanian Venkatakrishnan / William W Turner / Michael VanNieuwenhze / Adam Zlotnick / 要旨: Defining mechanisms of direct-acting antivirals facilitates drug development and our understanding of virus function. Heteroaryldihydropyrimidines (HAPs) inappropriately activate assembly of ...Defining mechanisms of direct-acting antivirals facilitates drug development and our understanding of virus function. Heteroaryldihydropyrimidines (HAPs) inappropriately activate assembly of hepatitis B virus (HBV) core protein (Cp), suppressing formation of virions. We examined a fluorophore-labeled HAP, HAP-TAMRA. HAP-TAMRA induced Cp assembly and also bound pre-assembled capsids. Kinetic and spectroscopic studies imply that HAP-binding sites are usually not available but are bound cooperatively. Using cryo-EM, we observed that HAP-TAMRA asymmetrically deformed capsids, creating a heterogeneous array of sharp angles, flat regions, and outright breaks. To achieve high resolution reconstruction (<4 Å), we introduced a disulfide crosslink that rescued particle symmetry. We deduced that HAP-TAMRA caused quasi-sixfold vertices to become flatter and fivefold more angular. This transition led to asymmetric faceting. That a disordered crosslink could rescue symmetry implies that capsids have tensegrity properties. Capsid distortion and disruption is a new mechanism by which molecules like the HAPs can block HBV infection.
#200 - 2016年8月 正二十面体型ウイルスの準対称性 (Quasisymmetry in Icosahedral Viruses) 類似性 (1)
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マップ
ファイル
ダウンロード / ファイル: emd_7294.map.gz / 形式: CCP4 / 大きさ: 209.3 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
A Hepatitis B virus capsid with T=4 symmetry, bound to HAP-TAMRA. HAP-TAMRA is a fluorescent probe derived from the Heteroaryldihydropyrimidine (HAP) class of capsid-directed antivirals.