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Creators/Authors contains: "Sunil, Sruthi"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, New Phytologist)
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    Plant nucleotide-binding leucine-rich repeat receptors (NLRs) regulate immunity and cell death. In Arabidopsis , a subfamily of “helper” NLRs is required by many “sensor” NLRs. Active NRG1.1 oligomerized, was enriched in plasma membrane puncta, and conferred cytoplasmic calcium ion (Ca 2+ ) influx in plant and human cells. NRG1.1-dependent Ca 2+ influx and cell death were sensitive to Ca 2+ channel blockers and were suppressed by mutations affecting oligomerization or plasma membrane enrichment. Ca 2+ influx and cell death mediated by NRG1.1 and ACTIVATED DISEASE RESISTANCE 1 (ADR1), another helper NLR, required conserved negatively charged N-terminal residues. Whole-cell voltage-clamp recordings demonstrated that Arabidopsis helper NLRs form Ca 2+ -permeable cation channels to directly regulate cytoplasmic Ca 2+ levels and consequent cell death. Thus, helper NLRs transduce cell death signals directly. 
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