- EMDB-5829: Architecture of a dsDNA viral capsid in complex with its maturati... -
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データベース: EMDB / ID: EMD-5829
タイトル
Architecture of a dsDNA viral capsid in complex with its maturation protease
マップデータ
Prohead-1 with protease (before sharpening). A negative temperature factor of -300 A2 or -700 A2 should be applied to better visualize the features of the scaffolding domains or the coat subunit shell, respectively.
ジャーナル: Structure / 年: 2014 タイトル: Architecture of a dsDNA viral capsid in complex with its maturation protease. 著者: David Veesler / Reza Khayat / Srinath Krishnamurthy / Joost Snijder / Rick K Huang / Albert J R Heck / Ganesh S Anand / John E Johnson / 要旨: Most double-stranded DNA (dsDNA) viruses, including bacteriophages and herpesviruses, rely on a staged assembly process of capsid formation. A viral protease is required for many of them to ...Most double-stranded DNA (dsDNA) viruses, including bacteriophages and herpesviruses, rely on a staged assembly process of capsid formation. A viral protease is required for many of them to disconnect scaffolding domains/proteins from the capsid shell, therefore priming the maturation process. We used the bacteriophage HK97 as a model system to decipher the molecular mechanisms underlying the recruitment of the maturation protease by the assembling procapsid and the influence exerted onto the latter. Comparisons of the procapsid with and without protease using single-particle cryoelectron microscopy reconstructions, hydrogen/deuterium exchange coupled to mass spectrometry, and native mass spectrometry demonstrated that the protease interacts with the scaffolding domains within the procapsid interior and stabilizes them as well as the whole particle. The results suggest that the thermodynamic consequences of protease packaging are to shift the equilibrium between isolated coat subunit capsomers and procapsid in favor of the latter by stabilizing the assembled particle before making the process irreversible through proteolysis of the scaffolding domains.
ダウンロード / ファイル: emd_5829.map.gz / 形式: CCP4 / 大きさ: 300.3 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Prohead-1 with protease (before sharpening). A negative temperature factor of -300 A2 or -700 A2 should be applied to better visualize the features of the scaffolding domains or the coat subunit shell, respectively.