Abstract
Cowpea mild mottle virus (CPMMV) is a flexuous filamentous virus that belongs to the genus Carlavirus (family Betaflexiviridae). The CPMMV genome contains six open reading frames (ORFs), among which the triple gene block (TGB), encoded by ORFs 2 to 4, has been reported to encode movement proteins for different viruses. The subcellular localization of the TGB proteins of CPMMV isolate CPMMV:BR:MG:09:2 was analysed by transient expression of each protein fused to a fluorophore. Overall, the accumulation pattern and interactions among CPMMV TGB proteins (TGBp) were similar to those of their counterparts from the potex-like group. Considering these similarities, we evaluated the potential interactions between the TGB proteins of CPMMV and of potato virus X, which could complement cell-to-cell movement. The TGBp2 and TGBp3 of PVX had an effect on CPMMV TGBp1, directing it to the plasmodesmata, but the reverse was not true.
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Funding
This work was funded by Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) Processo: APQ-01604-14, Brazil. S.L.C. was supported by a scholarship from the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brasil. Parts of this work were funded by the U.K. Biotechnology and Biomedical Sciences Research Council (BBSRC) grant BB/M007200/1 to J.T. Work in the J.T. laboratory is supported by the Scottish Government’s Rural and Environment Science and Analytical Services Division (RESAS).
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Carvalho, S.L., Tilsner, J., Figueira, A.R. et al. Subcellular localization and interactions among TGB proteins of cowpea mild mottle virus. Arch Virol 167, 2555–2566 (2022). https://doi.org/10.1007/s00705-022-05576-7
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DOI: https://doi.org/10.1007/s00705-022-05576-7