ジャーナル: Nat Commun / 年: 2022 タイトル: In situ structure and dynamics of an alphacoronavirus spike protein by cryo-ET and cryo-EM. 著者: Cheng-Yu Huang / Piotr Draczkowski / Yong-Sheng Wang / Chia-Yu Chang / Yu-Chun Chien / Yun-Han Cheng / Yi-Min Wu / Chun-Hsiung Wang / Yuan-Chih Chang / Yen-Chen Chang / Tzu-Jing Yang / Yu-Xi ...著者: Cheng-Yu Huang / Piotr Draczkowski / Yong-Sheng Wang / Chia-Yu Chang / Yu-Chun Chien / Yun-Han Cheng / Yi-Min Wu / Chun-Hsiung Wang / Yuan-Chih Chang / Yen-Chen Chang / Tzu-Jing Yang / Yu-Xi Tsai / Kay-Hooi Khoo / Hui-Wen Chang / Shang-Te Danny Hsu / 要旨: Porcine epidemic diarrhea (PED) is a highly contagious swine disease caused by porcine epidemic diarrhea virus (PEDV). PED causes enteric disorders with an exceptionally high fatality in neonates, ...Porcine epidemic diarrhea (PED) is a highly contagious swine disease caused by porcine epidemic diarrhea virus (PEDV). PED causes enteric disorders with an exceptionally high fatality in neonates, bringing substantial economic losses in the pork industry. The trimeric spike (S) glycoprotein of PEDV is responsible for virus-host recognition, membrane fusion, and is the main target for vaccine development and antigenic analysis. The atomic structures of the recombinant PEDV S proteins of two different strains have been reported, but they reveal distinct N-terminal domain 0 (D0) architectures that may correspond to different functional states. The existence of the D0 is a unique feature of alphacoronavirus. Here we combined cryo-electron tomography (cryo-ET) and cryo-electron microscopy (cryo-EM) to demonstrate in situ the asynchronous S protein D0 motions on intact viral particles of a highly virulent PEDV Pintung 52 strain. We further determined the cryo-EM structure of the recombinant S protein derived from a porcine cell line, which revealed additional domain motions likely associated with receptor binding. By integrating mass spectrometry and cryo-EM, we delineated the complex compositions and spatial distribution of the PEDV S protein N-glycans, and demonstrated the functional role of a key N-glycan in modulating the D0 conformation.
タイプ: MAXIMUM LIKELIHOOD / ソフトウェア - 名称: RELION (ver. 3.1)
最終 角度割当
タイプ: OTHER / ソフトウェア - 名称: cryoSPARC (ver. 3.1) / 詳細: Non-uniform refinement in CryoSparc3.1
最終 3次元分類
詳細: Non-uniform refinement in CryoSparc3.1
FSC曲線 (解像度の算出)
-
原子モデル構築 1
精密化
空間: REAL / プロトコル: RIGID BODY FIT
得られたモデル
PDB-7w6m: Cryo-EM map of PEDV (Pintung 52) S protein with all three protomers in the D0-down conformation determined in situ on intact viral particles.