We expressed a maize CC-NBS-LRR protein in Nicotiana benthamiana by injecting the Agrobacterium strain GV3101 with a maize CNL protein into the leaves, cell death was observed after 3 days without the presence of the cognate pathogen effector, Does this happen often?
Jiankun Li Similar events have been reported before. Look at:
The TIR-NB-LRR Gene SNC1 Is Regulated at the Transcript Level by Multiple Factors | Molecular Plant-Microbe Interactions® (apsnet.org)
Both overexpression and suppression of an Oryza sativa NB-LRR-like gene OsLSR result in autoactivation of immune response and thiamine accumulation | Scientific Reports (nature.com)