The complete nucleotide sequence of an attenuated Pepper mild mottle virus (PMMoV C-1421) RNA genome has been determined. There were two differences from the type isolate in Japan (PMMoV-J). The mutations were located in the middle of the 126-kDa protein (126 K) gene; one mutation influenced amino acid substitution at 649th Val to Ala (V649A), and the other was silent. The analyses using the reverse genetic system of PMMoV-J revealed that symptom attenuation on pepper related to V649A. Accumulations of 126 K and coat protein (CP) in V649A mutant-infected pepper were lower than those of PMMoV-J in immunoblotting. These results suggest that V649A substitution in 126 K affects the accumulation of 126 K leading to a limitation of CP accumulation.
Archives of Virology – Springer Journals
Published: Apr 1, 2002
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