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The goal of these experiments was to determine the steps in virus assembly that are defective at the nonpermissive temperature in temperature-sensitive (ts) matrix (M) protein mutants of vesicular stomatitis virus. It has been proposed that mutations in M protein either reduce the binding affinity for nucleocapsids or lead to aggregation, reducing the amount of M protein available for virus assembly...
During budding of vesicular stomatitis virus (VSV), the viral matrix (M) protein binds the viral nucleocapsid to the host plasma membrane and condenses the nucleocapsid into the tightly coiled nucleocapsid–M protein (NCM) complex observed in virions. In infected cells, the viral M protein exists mostly as a soluble molecule in the cytoplasm, and a small amount is bound to the plasma membrane. Despite...