The primary structure of the coat protein (CP) gene was examined for pathogenic strain MS-1 and vaccine strain VIROG-43M of the cucumber green mottle mosaic virus (CGMMV). In CP amino acid composition, strains MS-1 and VIROG-43M are typical representatives of CGMMV: their CPs have 98-100% homology to CPs of other tobamoviruses of the group. The CP gene has the same nucleotide composition in pathogenic MS-1 and vaccine VIROG-43M, indicating that strain attenuation is not determined by this gene. The CP amino acid sequences of the two Russian strains are fully identical to the CP sequences of two Greek strains, GR-3 and GR-5. However, the nucleotide sequences of their genes differ in 13 bp, testifying to the difference between the Russian and Greek strains.
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