Identification of proteins encoded by avian reoviruses and evidence for post-translational modification

Twelve avian reovirus strain 176 proteins, 10 structural (lambda 1, lambda 2, lambda 3, mu 1, mu 2/mu 2C, sigma 1, sigma 2, sigma 3, and sigma 4), and 2 nonstructural (mu NS and sigma NS) were identified and characterized by electrophoretic analysis of purified virions and infected cell lysates. Three of the identified proteins (mu 1, mu NS, and sigma 4) have not been previously described. In pulse-chase experiments, 10 of the proteins (lambda 1, lambda 2, lambda 3, mu 1, mu 2, mu NS, sigma 1, sigma 2, sigma NS, sigma 3) were shown to be primary translation products, whereas mu 2C was shown to be a post-translational cleavage product of mu 2.