1887

Abstract

The Newcastle disease virus (NDV) matrix (M) protein is a highly basic and nucleocytoplasmic shuttling viral protein. Previous study has demonstrated that the N-terminal 100 aa of NDV M protein are somewhat acidic overall, but the remainder of the polypeptide is strongly basic. In this study, we investigated the role of the N-terminal basic residues in the subcellular localization of M protein and in the replication and pathogenicity of NDV. We found that mutation of the basic residue arginine (R) to alanine (A) at position 42 disrupted M’s nuclear localization. Moreover, a recombinant virus with R42A mutation in the M protein reduced viral replication in DF-1 cells and attenuated the virulence and pathogenicity of the virus in chickens. This is the first report to show that a basic residue mutation in the NDV M protein abrogates its nuclear localization and attenuates viral replication and pathogenicity.

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2014-05-01
2020-01-22
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