Interaction between Cucumber mosaic virus 2b protein and plant catalase induces a specific necrosis in association with proteasome activity.

ABSTRACT:

Key message

Cucumber mosaic virus (CMV) can induce a specific necrosis on Arabidopsis through the interaction between the CMV 2b protein and host catalase, in which the ubiquitin-proteasome pathway may be involved. We previously reported that the CMV 2b protein, the viral RNA silencing suppressor, interacted with the H₂O₂ scavenger catalase (CAT3), leading to necrosis on CMV-inoculated Arabidopsis leaves. We here confirmed that CMV could more abundantly accumulate in the CAT3-knockout mutant (cat3), and that CAT3 makes host plants a little more tolerant to CMV. We also found that the necrosis severity is not simply explained by a high level of H₂O₂ given by the lack of CAT3, because the recombinant CMV, CMV-N, induced much milder necrosis

SUBMITTER: Murota K 

PROVIDER: S-EPMC5206265 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature