Map1Lc3B — Lc3B is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Microtubule-Associated Protein 1 Light Chain 3 Beta | ||
|---|---|---|
| Gene Symbol | MAP1LC3B | |
| Full Name | Microtubule-associated proteins 1A/1B light chain 3B | |
| Chromosome | 16q24.2 | NCBI Gene ID> |
| 81631 | ||
| OMIM | 609605 | |
| Ensembl ID | ENSG00000140941 | |
| UniProt ID | Q9GZQ8 | |
| Associated Diseases | Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, Lysosomal Storage Disorders | |
MAP1LC3B — LC3B is involved in biological pathways relevant to neurodegenerative diseases. It plays important roles in neuronal function, cellular signaling, or stress response mechanisms.
Dysregulation or mutations in this gene/protein contribute to the pathogenesis of Alzheimer's disease, Parkinson's disease, and related neurodegenerative disorders.
MAP1LC3B encodes microtubule-associated protein 1 light chain 3 beta (LC3B), a key protein in the autophagy pathway. LC3B is essential for autophagosome formation and serves as a reliable marker for autophagy activity. The protein undergoes post-translational modifications crucial for its function:
During autophagy, LC3-I is conjugated to phosphatidylethanolamine (PE) by the ATG7 (E1-like) and ATG3 (E2-like) enzymes, generating LC3-II. LC3-II localizes to the autophagosome membrane and is involved in:
MAP1LC3B is ubiquitously expressed with high levels in:
Expression is regulated by:
| Disease | Variants | Inheritance | Mechanism |
|---|---|---|---|
| Alzheimer's Disease | G120A | Risk factor | Impaired autophagic flux, accumulation of LC3-positive aggregates |
| Parkinson's Disease | A53T | Risk factor | Defective mitophagy, accumulation of damaged mitochondria |
| Huntington's Disease | - | Modifier | Reduced autophagy leads to mutant huntingtin accumulation |
| Lysosomal Storage Disorders | - | Modifier | Impaired autophagosome-lysosome fusion |
Therapeutic approaches targeting MAP1LC3B/autophagy include:
The study of Map1Lc3B — Lc3B 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.