Typical of all mastreviruses, MSV's circular, ~2.7-Kb monopartite single-stranded (ss) DNA genome encodes only four proteins. Bidirectional transcription from a long intergenic region (LIR) results in the virion-sense expression of a movement protein (MP) and a coat protein (CP), and the complementary-sense expression of the replication-associated proteins, Rep and RepA.
Mastreviruses are typically characterized by their small, circular DNA genome (~2.7-Kb) that encodes only four essential proteins. The transcription process begins from a long intergenic region (LIR), resulting in the production of two critical movement proteins (MP) and coat proteins (CP), as well as two replication-associated proteins (Rep and RepA).