Download MendeleyThe Matrix protein M1 from influenza C virus induces tubular membrane invaginations in an in vitro cell membrane model.
Saletti, D., Radzimanowski, J., Effantin, G., Midtvedt, D., Mangenot, S., Weissenhorn, W., Bassereau, P., Bally, M.(2017) Sci Rep 7: 40801-40801
- PubMed: 28120862
- DOI: https://doi.org/10.1038/srep40801
- Primary Citation of Related Structures:
5M1M - PubMed Abstract:
Matrix proteins from enveloped viruses play an important role in budding and stabilizing virus particles. In order to assess the role of the matrix protein M1 from influenza C virus (M1-C) in plasma membrane deformation, we have combined structural and in vitro reconstitution experiments with model membranes. We present the crystal structure of the N-terminal domain of M1-C and show by Small Angle X-Ray Scattering analysis that full-length M1-C folds into an elongated structure that associates laterally into ring-like or filamentous polymers. Using negatively charged giant unilamellar vesicles (GUVs), we demonstrate that M1-C full-length binds to and induces inward budding of membrane tubules with diameters that resemble the diameter of viruses. Membrane tubule formation requires the C-terminal domain of M1-C, corroborating its essential role for M1-C polymerization. Our results indicate that M1-C assembly on membranes constitutes the driving force for budding and suggest that M1-C plays a key role in facilitating viral egress.
Organizational Affiliation:
Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS UMR168, 75005, Paris, France.
