NAD+ depletion by catalytic TIR domains triggers a distinct form of regulated necrosis in mammalian cells.
Proteins containing Toll/interleukin-1 receptor (TIR) domains with catalytic NADase activity have recently emerged as major regulators of innate immunity in both bacteria and plants. In humans, however, only a single protein-SARM1-exhibits TIR-dependent NADase activity. Initially reported to act as a negative regulator...