Chitin-binding proteins override host plant's resistance to fungal infection

phys.org | 10/7/2019 | Staff
DebraSDebraS (Posted by) Level 3
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VnaChtBP protects fungus against degradation by plant chitinases. Micrographs of Trichoderma viride germinating spores, preincubated at room temperature for 2 h with 3 μM VnaChtBP followed by the addition of xylem sap (chitinase at 19 U/mg of total protein) from Verticillium nonalfalfae-infected hop, were taken 24 h after treatment. Credit: Helena Volk, Kristina Marton, Marko Flajšman, et al.

An insoluble complex carbohydrate, chitin makes up fungal walls and plays a significant role in the interaction between fungal pathogens and their plant hosts. Plant cells harbor immune receptors that perceive chitin and work to stop fungal infection. However, fungal plant pathogens then release chitin-binding proteins that perturb the chitin-triggered immunity.

Plant-Microbe - Interactions - Article - Studies - Proteins

A recent Molecular Plant-Microbe Interactions article studies one of these chitin-binding proteins from a soilborne fungus (Verticillium nonalfalfae) that causes vascular wilt in plants. This fungus binds a particular protein (VnaChtBP) to chitin in...
(Excerpt) Read more at: phys.org
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