Map1Lc3A 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.
:: infobox .infobox-gene [1]
Symbol: MAP1LC3A [2]
Full Name: Microtubule Associated Protein 1 Light Chain 3 Alpha [3]
Chromosomal Location: 20q11.22 [4]
NCBI Gene ID: 9455 [5]
OMIM: 609453 [6]
Ensembl ID: ENSG00000101460 [7]
UniProt: Q9Y488 [8]
Proteins: LC3A [9]
Associated Diseases: Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, ALS
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MAP1LC3A (Microtubule-Associated Protein 1 Light Chain 3 Alpha) encodes LC3A, a fundamental protein in the autophagy pathway. LC3A is a member of the LC3/GABARAP family, which are ubiquitin-like proteins essential for autophagosome formation and cargo recruitment. The MAP1LC3A gene produces multiple isoforms through alternative splicing, with LC3A being widely expressed in neural tissue. This protein plays critical roles in neuronal homeostasis, protein quality control, and cellular stress responses—all processes central to neurodegenerative disease pathogenesis.
LC3A undergoes post-translational processing to become functional. The precursor LC3 is first cleaved by ATG4B to generate LC3-I, which is then conjugated to phosphatidylethanolamine (PE) by the ATG7/ATG3 system to form LC3-II (lipidated LC3). LC3-II is directly integrated into the expanding autophagosome membrane, where it serves multiple essential functions:
The LC3/GABARAP family includes:
These proteins have overlapping but distinct functions in autophagy.
LC3A exhibits tissue-specific expression:
LC3A and autophagy are implicated in AD through multiple mechanisms:
Research shows decreased LC3A expression in AD brain tissue, correlating with cognitive decline.
LC3A is central to PD pathogenesis:
The study of Map1Lc3A 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.
Kuma A, Komatsu M, Mizushima N. "Autophagy-independent function of MAP1LC3 family proteins." Autophagy (2018). Autophagy. 2018. ↩︎
Boland B, Yu WH, Corti O, et al. "Promoting the clearance of neurotoxic proteins in neurodegenerative disorders." Nature Reviews Neurology (2018). Nature Reviews Neurology. 2018. ↩︎
Nixon RA. "The role of autophagy in neurodegenerative disease." Nature Medicine (2013). Nature Medicine. 2013. ↩︎
Cheng J, Laird AE, Mauczuk K, et al. "Autophagy regulation by LC3 family proteins in neurodegenerative diseases." Cell Death & Disease (2022). Cell Death & Disease. 2022. ↩︎
Lee JH, Yu WH, Kumar A, et al. "Lysosomal proteolysis inhibition causes selective accumulation of autophagosomes in Alzheimer's disease." Nature (2010). Nature. 2010. ↩︎
Yamamoto A, Simonsen A. "The impairment of autophagy as a pathological mechanism in Alzheimer's disease." Molecular and Cellular Neurosciences (2011). Molecular and Cellular Neurosciences. 2011. ↩︎
Song P, Li S, Wu H, et al. "LRRK2 and autophagic dysfunction in Parkinson's disease." Neurobiology of Disease (2022). Neurobiology of Disease. 2022. ↩︎
Cai Q, Zakaria HM, Lee JG. "Spatial parkin entanglement in mitochondrial quality control." Trends in Neurosciences (2014). Trends in Neurosciences. 2014. ↩︎
Ashkenazi A, Bento CF, Ricketts T, et al. "Polyglutamine disease: when aggregation goes awry." Neuron (2017). Neuron. 2017. ↩︎