Capping proteins regulate fungal development, DON-toxisome formation and virulence in Fusarium graminearum.

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ID: 64817
2019
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Abstract
Deoxynivalenol (DON) is an important trichothecene mycotoxin produced by the cereal pathogen Fusarium graminearum. DON is synthesized in organized endoplasmic reticulum structures called toxisomes. However, the mechanism for toxisome formation and the components of toxisomes are not yet fully understood. In a previous study, we found that myosin I (FgMyo1)-actin cytoskeleton participated in toxisome formation. In the current study, we identified two new components of toxisomes, the actin capping proteins (CAPs) FgCapA and FgCapB. These two CAPs form a heterodimer in F. graminearum, and physically interact with FgMyo1 and Tri1. The deletion mutants ΔFgcapA and ΔFgcapB and the double deletion mutant ΔΔFgcapA/B dramatically reduced hyphal growth, asexual and sexual reproduction and endocytosis. More importantly, the deletion mutants markedly disrupted toxisome formation and DON production, and attenuated virulence in planta. Collectively, these results suggest that the actin CAPs are associated with toxisome formation and contribute to the virulence and development of F. graminearum.
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tang2019cappingmolecular Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Tang, Guangfei;Chen, Ahai;Dawood, Dawood H;Liang, Jingting;Chen, Yun;Ma, Zhonghua;
Journal molecular plant pathology
Year 2019
DOI
10.1111/mpp.12887
URL
Keywords
virulence actin cytoskeleton fusarium graminearum capping protein deoxynivalenol (don) toxisome

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