LASER couples damage sensing to ESCRT assembly for lysosome repair

Researchers identified a novel mechanism for lysosome repair on June 3, 2026, detailed in a study published in Nature. This process, termed LASER (Lysosome Assembly Sensing and ESCRT Recruitment), involves the conjugation of ATG8 protein to damaged lysosomes. This ATG8 conjugation then initiates the rapid assembly of a protein complex that includes TFG (TRIM-like protein with FYVE domain). The TFG complex's primary role is to orchestrate lysosomal membrane repair by effectively recruiting ESCRT (Endosomal Sorting Complexes Required for Transport) proteins to the specific sites of lysosomal damage. This recruitment is crucial for sealing the membrane breaches and restoring lysosomal integrity. The study demonstrates that this pathway is a fundamental cellular response to lysosomal injury, ensuring the organelle's function and preventing cellular dysfunction.