Download MendeleyPlant "helper" immune receptors are Ca 2+ -permeable nonselective cation channels.
Jacob, P., Kim, N.H., Wu, F., El-Kasmi, F., Chi, Y., Walton, W.G., Furzer, O.J., Lietzan, A.D., Sunil, S., Kempthorn, K., Redinbo, M.R., Pei, Z.M., Wan, L., Dangl, J.L.(2021) Science 373: 420-425
- PubMed: 34140391
- DOI: https://doi.org/10.1126/science.abg7917
- Primary Citation of Related Structures:
7L7V, 7L7W - PubMed Abstract:
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.
Organizational Affiliation:
Department of Biology and Howard Hughes Medical Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
