ジャーナル: Nat Commun / 年: 2016 タイトル: Multiple capsid-stabilizing interactions revealed in a high-resolution structure of an emerging picornavirus causing neonatal sepsis. 著者: Shabih Shakeel / Brenda M Westerhuis / Ausra Domanska / Roman I Koning / Rishi Matadeen / Abraham J Koster / Arjen Q Bakker / Tim Beaumont / Katja C Wolthers / Sarah J Butcher / 要旨: The poorly studied picornavirus, human parechovirus 3 (HPeV3) causes neonatal sepsis with no therapies available. Our 4.3-Å resolution structure of HPeV3 on its own and at 15 Å resolution in ...The poorly studied picornavirus, human parechovirus 3 (HPeV3) causes neonatal sepsis with no therapies available. Our 4.3-Å resolution structure of HPeV3 on its own and at 15 Å resolution in complex with human monoclonal antibody Fabs demonstrates the expected picornavirus capsid structure with three distinct features. First, 25% of the HPeV3 RNA genome in 60 sites is highly ordered as confirmed by asymmetric reconstruction, and interacts with conserved regions of the capsid proteins VP1 and VP3. Second, the VP0 N terminus stabilizes the capsid inner surface, in contrast to other picornaviruses where on expulsion as VP4, it forms an RNA translocation channel. Last, VP1's hydrophobic pocket, the binding site for the antipicornaviral drug, pleconaril, is blocked and thus inappropriate for antiviral development. Together, these results suggest a direction for development of neutralizing antibodies, antiviral drugs based on targeting the RNA-protein interactions and dissection of virus assembly on the basis of RNA nucleation.
The movie frames were aligned initially by motion_corr. CTF deteremined using CTFFIND3. Particles picked using Ethan. 2D and 3D classification (with icosahedral symmetry imposed) done in Relion. Final reconstruction in Relion.
CTF補正
詳細: Each micrograph
最終 再構成
想定した対称性 - 点群: C1 (非対称) / アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 10.36 Å / 解像度の算出法: OTHER ソフトウェア - 名称: Ethan, CTFFIND3, Eman1, Eman2, Auto3DEM, Relion, ResMap 使用した粒子像数: 41845