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Research article2005Peer reviewedOpen access

Localization of Poa semilatent virus cysteine-rich protein in peroxisomes is dispensable for its ability to suppress RNA silencing

Yelina, NE; Erokhina, TN; Lukhovitskaya, NI; Minina, EA; Schepetilnikov, MV; Lesemann, DE; Schiemann, J; Solovyev, AG; Morozov, SY


Subcellular localization of the Poa semilatent virus cysteine-rich gammab protein was studied by using different approaches. In infected tissue, gammab was detected mainly in the P30 fraction as monomers, dinners and oligomers. Green fluorescent protein-fused gammab was found to localize in punctate bodies in the cytoplasm. Colocalization with marker proteins demonstrated that these bodies represent peroxisomes. Immunoelectron microscopy revealed that gammab was localized in the peroxisomal matrix and that localization of gammab in peroxisomes required the C-terminal signal tripeptide SKL. An SKL-deletion mutant exhibited a diffuse localization. but retained the protein's ability to suppress RNA silencing, determine infection phenotype and support virus systemic spread. These data indicate that gammab functions are not associated with the protein's localization to peroxisomes.

Published in

Journal of General Virology
2005, Volume: 86, pages: 479-489

    UKÄ Subject classification

    Cell Biology
    Biochemistry and Molecular Biology

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