National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI081726
米国
引用
ジャーナル: Nat Commun / 年: 2020 タイトル: Structural morphing in a symmetry-mismatched viral vertex. 著者: Qianglin Fang / Wei-Chun Tang / Pan Tao / Marthandan Mahalingam / Andrei Fokine / Michael G Rossmann / Venigalla B Rao / 要旨: Large biological structures are assembled from smaller, often symmetric, sub-structures. However, asymmetry among sub-structures is fundamentally important for biological function. An extreme form of ...Large biological structures are assembled from smaller, often symmetric, sub-structures. However, asymmetry among sub-structures is fundamentally important for biological function. An extreme form of asymmetry, a 12-fold-symmetric dodecameric portal complex inserted into a 5-fold-symmetric capsid vertex, is found in numerous icosahedral viruses, including tailed bacteriophages, herpesviruses, and archaeal viruses. This vertex is critical for driving capsid assembly, DNA packaging, tail attachment, and genome ejection. Here, we report the near-atomic in situ structure of the symmetry-mismatched portal vertex from bacteriophage T4. Remarkably, the local structure of portal morphs to compensate for symmetry-mismatch, forming similar interactions in different capsid environments while maintaining strict symmetry in the rest of the structure. This creates a unique and unusually dynamic symmetry-mismatched vertex that is central to building an infectious virion.
#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)
-
集合体
登録構造単位
a: Major capsid protein b: Major capsid protein c: Major capsid protein d: Major capsid protein e: Major capsid protein f: Major capsid protein g: Major capsid protein h: Major capsid protein i: Major capsid protein j: Major capsid protein k: Major capsid protein l: Major capsid protein m: Major capsid protein n: Major capsid protein o: Major capsid protein p: Major capsid protein q: Major capsid protein r: Major capsid protein s: Major capsid protein t: Major capsid protein u: Major capsid protein v: Major capsid protein w: Major capsid protein x: Major capsid protein y: Major capsid protein z: Major capsid protein A: Major capsid protein B: Major capsid protein C: Major capsid protein D: Major capsid protein E: Portal protein F: Portal protein G: Portal protein H: Portal protein I: Portal protein J: Portal protein K: Portal protein L: Portal protein M: Portal protein N: Portal protein O: Portal protein P: Portal protein