Wheat's immune proteins form a never-before-seen eight-unit ring to fight disease
Islam T
Plant Signaling
Every loaf of sourdough started as wheat that survived a pathogen assault, and this discovery maps one of the molecular tools behind that survival: an eight-protein ring that tells infected cells to die before disease can spread.
Plants have an immune system, and like ours, it depends on proteins that detect invaders and trigger a defense. Scientists found that wheat uses a special immune protein that gathers eight copies of itself into a ring, then signals the infected cell to self-destruct before disease can spread further. This controlled sacrifice cuts off the pathogen's food supply and keeps the rest of the plant healthy.
Key Findings
A wheat immune protein called Wheat Autoimmunity 3 assembles into an eight-unit (octameric) complex, a configuration not previously observed in any plant immune receptor.
The octameric complex acts as a resistosome, triggering programmed cell death in infected tissue to physically block pathogen spread.
The discovery reveals structural plasticity in plant immunity, showing that NLR immune receptors can adopt fundamentally different shapes to achieve the same defensive goal.
chevron_right Technical Summary
Scientists discovered that a wheat immune protein assembles into an eight-unit ring structure to trigger targeted cell death and halt disease spread. This configuration, called an octameric resistosome, had never been seen in plants before, revealing unexpected flexibility in how plants mount their defenses.
Abstract Preview
Original paper
The octameric shift in plant immune signaling.
Nucleotide-binding leucine-rich repeat (NLR) receptors are ubiquitous intracellular sensors. Guo et al. recently revealed that the wheat CCG10-NLR, Wheat Autoimmunity 3, forms a previously undescri...
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