Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Government of the United States of America - Macromolecular Crystallography Laboratory, Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Institut Pasteur Korea - Respiratory Viruses Research Laboratory, Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Government of the United States of America - Protein Interactions Section, Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Government of the United States of America - Division of Viral Products, Government of the United States of America - Protein Interactions Section, Government of the United States of America - Protein Interactions Section, Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Government of the United States of America - Division of Viral Products, Government of the United States of America - Division of Viral Products, Institut Pasteur Korea - Respiratory Viruses Research Laboratory, Government of the United States of America - Division of Viral Products, Government of the United States of America - Macromolecular Crystallography Laboratory, Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Government of the United States of America - Protein Interactions Section and Fudan University - Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS)