title: Molecular dynamics analysis of conformational change of paramyxovirus F protein during the initial steps of membrane fusion.
abstract: The fusion of paramyxovirus to the cell membrane is mediated by fusion protein (F protein) present in the virus envelope, which undergoes a dramatic conformational change during the process. Unlike hemagglutinin in orthomyxovirus, this change is not mediated by an alteration of environmental pH, and its cause remains unknown. Steered molecular dynamics analysis leads us to suggest that the conformational modification is mediated only by stretching mechanical forces once the transmembrane fusion peptide of the protein is anchored to the cell membrane. Such elongating forces will generate major secondary structure rearrangement in the heptad repeat A region of the F protein; from β-sheet conformation to an elongated coil and then spontaneously to an α-helix. In addition, it is proposed that the heptad repeat A region adopts a final three-helix coiled coil and that this structure appears after the formation of individual helices in each monomer.
authors.affiliation: Centro de Biología Molecular Severo Ochoa (CSIC/UAM), C/ Nicolás Cabrera, 1, Cantoblanco, 28049 Madrid, Spain.
authors.forename: Fernando
authors.initials: F
authors.lastname: Martín-García
authors.forename: Jesús Ignacio
authors.initials: JI
authors.lastname: Mendieta-Moreno
authors.forename: Jesús
authors.initials: J
authors.lastname: Mendieta
authors.forename: Paulino
authors.initials: P
authors.lastname: Gómez-Puertas
mesh_terms: D008561:Membrane Fusion; D056004:Molecular Dynamics Simulation; D010252:Paramyxoviridae / Q000502:physiology*; D017433:Protein Structure, Secondary; D014760:Viral Fusion Proteins / Q000737:chemistry*; D053586:Virus Internalization
chemical_list: D014760:Viral Fusion Proteins