Atg4C Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Autophagy Related 4C Cysteine Peptidase | |
|---|---|
| Gene Symbol | ATG4C |
| Full Name | Autophagy Related 4C Cysteine Peptidase |
| Chromosome | 19p13.3 |
| NCBI Gene ID | 84938 |
| OMIM | 604305 |
| Ensembl ID | ENSG00000125743 |
| UniProt ID | Q9Y4P5 |
| Associated Diseases | Parkinson's Disease, Huntington's Disease, Cancer, Cardiomyopathy |
ATG4C (Autophagy Related 4C Cysteine Protease) is a cysteine protease essential for autophagosome formation during macroautophagy. ATG4C is one of four human ATG4 homologs (ATG4A-D) that cleave the microtubule-associated protein 1 light chain 3 (LC3) family proteins, converting them from the pro-LC3 form to the lipidated form that localizes to autophagosomes. Autophagy is a critical cellular process for degrading and recycling damaged organelles, misfolded proteins, and intracellular pathogens.
In neurodegeneration, ATG4C plays a protective role by facilitating the clearance of protein aggregates that characterize diseases like Alzheimer's, Parkinson's, and Huntington's. Reduced ATG4C expression and activity have been associated with impaired autophagy and increased accumulation of toxic protein aggregates. Enhancing ATG4C activity represents a therapeutic strategy for promoting autophagic clearance of neurotoxic proteins.
ATG4C encodes a cysteine protease involved in the autophagy pathway. ATG4C is one of four ATG4 homologs (ATG4A-D) that process LC3 (MAP1LC3A/B) and other Atg8 family proteins. ATG4C cleaves the C-terminal glycine from pro-LC3 to generate LC3-I, which is then conjugated to phosphatidylethanolamine to form LC3-II, the lipidated form that associates with autophagosomal membranes. ATG4C is expressed in various tissues with higher expression in brain and muscle. It is involved in both basal and induced autophagy, playing important roles in cellular homeostasis, stress response, and neurodegeneration.
Moderate expression in most tissues with higher levels in brain, heart, and skeletal muscle. Induced under starvation conditions.
| Disease | Variants | Inheritance | Mechanism |
|---|---|---|---|
| Parkinson's Disease | Splice variants | Risk factor | Impaired autophagy |
| Huntington's Disease | Variants | Modifier | Altered protein clearance |
| Cancer | Variants | Context-dependent | Autophagy regulation |
| Cardiomyopathy | Variants | Risk factor | Autophagy defects |
The study of Atg4C Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.