Ferroptosis regulation by the NGLY1/NFE2L1 pathway

Ferroptosis is an oxidative form of nonapoptotic cell death whose transcriptional regulation is poorly understood. Cap'n'collar (CNC) transcription factors including nuclear factor erythroid-2-related factor 1 (NFE2L1/NRF1) and NFE2L2 (NRF2) are important regulators of oxidative stress responses. NFE2L1 abundance and function are regulated posttranslationally by N-glycosylation. Functional maturation of NFE2L1 requires deglycosylation by cytosolic peptide:N-glycanase 1 (NGLY1). We find that NGLY1 and NFE2L1 work in a common pathway to enhance ferroptosis resistance, independent of NFE2L2, by promoting expression of the key antiferroptotic enzyme glutathione peroxidase 4 (GPX4). Enhanced ferroptosis sensitivity in NFE2L1-knockout cells can be reverted by expression of an NFE2L1 mutant containing eight asparagine-to-aspartate protein sequence substitutions, which mimic NGLY1-catalyzed protein sequence editing. These results suggest that ferroptosis sensitivity may be regulated by NGLY1-catalyzed NFE2L1 deglycosylation. These results highlight a role for the disease-associated NGLY1/NFE2L1 pathway in ferroptosis regulation.

Automated summary

The cytosolic peptide: N-glycanase 1 (NGLY1) and nuclear factor erythroid-2-related factor 1 (NFE2L1/NRF1) work together to enhance the resistance of ferroptosis, a form of nonapoptotic cell death induced by oxidative stress. This is achieved by promoting the expression of glutathione peroxidase 4 (GPX4), an enzyme that plays a key role in protecting cells from ferroptosis. These findings suggest that NGLY1-catalyzed deglycosylation of NFE2L1 may regulate ferroptosis sensitivity.