ATG4 autophagy related 4 homolog B (S. cerevisiae)
AUT like 1 cysteine endopeptidase
AUT-like 1 cysteine endopeptidase
Autophagy related cysteine endopeptidase 1
Autophagy related protein 4 homolog B
Autophagy-related cysteine endopeptidase 1
Autophagy-related protein 4 homolog B
Cysteine protease ATG4B
FunctionCysteine protease required for autophagy, which cleaves the C-terminal part of either MAP1LC3, GABARAPL2 or GABARAP, allowing the liberation of form I. A subpopulation of form I is subsequently converted to a smaller form (form II). Form II, with a revealed C-terminal glycine, is considered to be the phosphatidylethanolamine (PE)-conjugated form, and has the capacity for the binding to autophagosomes.
Tissue specificityMainly expressed in the skeletal muscle, followed by brain, heart, liver and pancreas.
Sequence similaritiesBelongs to the peptidase C54 family.