MAP1LC3A Protein

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MAP1LC3A Protein

Overview

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">MAP1LC3A Protein</th>
</tr>
<tr>
<td class="label">Protein Symbol</td>
<td>MAP1LC3A (LC3A)</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Microtubule-Associated Protein 1 Light Chain 3 Alpha</td>
</tr>
<tr>
<td class="label">NCBI Protein ID</td>
<td>NP_115903.1</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q9Y9P3</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>14.5 kDa</td>
</tr>
<tr>
<td class="label">Amino Acids</td>
<td>121</td>
</tr>
<tr>
<td class="label">Form</td>
<td>Modification</td>
</tr>
<tr>
<td class="label">Pro-LC3</td>
<td>Full-length</td>
</tr>
<tr>
<td class="label">LC3-I</td>
<td>Cytosolic</td>
</tr>
<tr>
<td class="label">LC3-II</td>
<td>Phosphatidylethanolamine</td>
</tr>
<tr>
<td class="label">Cell Type</td>
<td>Expression</td>
</tr>
<tr>
<td class="label">[Neurons](/entities/neurons)</td>
<td>High</td>
</tr>
<tr>
<td class="label">[Astrocytes](/entities/astrocytes)</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">[Microglia](/entities/microglia)</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Oligodendrocytes</td>
<td>Low</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <

...

MAP1LC3A Protein

Overview

Map1Lc3A Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Introduction

Map1Lc3A Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@mizushima2011]

The MAP1LC3A gene (Microtubule-Associated Protein 1 Light Chain 3 Alpha) encodes a core protein of the autophagy machinery. LC3 is essential for autophagosome formation and is widely used as a marker for autophagy activity in neurodegenerative diseases. [@klionsky2016]

Protein Overview

Normal Function

LC3A is a fundamental autophagy protein:

Autophagosome formation: Core structural component
Cargo recognition: Binds autophagy receptors via LIR motif
Membrane recruitment: Facilitates ATG protein recruitment
Fusion machinery: Involved in lysosome fusion
Neuronal function: Synaptic vesicle cycling

Molecular Mechanism

Processing and Forms

LC3 undergoes processing:

The conversion of LC3-I to LC3-II via phosphatidylethanolamine conjugation is essential for autophagy.

LIR Motif Interactions

LC3 recognizes cargo via LIR (LC3-Interacting Region) motifs:

p62/SQSTM1: Selective autophagy
NBR1: Protein aggregates
OPTN: Mitophagy receptor
TBK1: [Autophagy](/entities/autophagy) regulation

Structural Features

Key structural elements:

N-terminal ubiquitin-like domain
LIR motif (positions 13-36)
Phospholipid-binding site
Dimerization interface

Brain Expression

LC3A expression in brain cell types:

Disease Associations

Alzheimer's Disease

LC3 accumulation in AD brains
Impaired autophagic flux
Colocalizes with [Aβ](/proteins/amyloid-beta) plaques
Therapeutic: Enhance autophagy

Parkinson's Disease

LC3 and [α-synuclein](/proteins/alpha-synuclein) colocalization
Mitophagy defects
Therapeutic target
Biomarker potential

ALS

Motor neuron LC3 aggregates
Autophagy impairment
Therapeutic: Autophagy enhancers

Huntington's Disease

Mutant [huntingtin](/proteins/huntingtin-protein) interactions
Autophagy blockade
Therapeutic potential

Therapeutic Implications

LC3-targeted therapeutic strategies:

Autophagy enhancers: Increase LC3-II formation

Small molecule activators: [mTOR](/entities/mtor) inhibitors, AMPK activators

Gene therapy: LC3 overexpression

Monitoring tools: LC3 as biomarker

Challenges:

Balancing autophagy vs. non-selective degradation
Cell-type specificity
Delivery to CNS

Animal Models

Key findings from models:

LC3A knockout mice: Viable, behavioral deficits
Autophagy reporters: GFP-LC3 mice
AD models: LC3-Aβ interactions
PD models: Mitophagy studies

Research Directions

Current research focus:

Live imaging: Real-time autophagosome tracking

Crispr screens: LC3-interacting proteins

Biomarkers: LC3 in CSF/blood

Therapeutics: Autophagy modulators

External Links

[UniProt: MAP1LC3A](https://www.uniprot.org/uniprot/Q9Y9P3)
[NCBI: MAP1LC3A](https://www.ncbi.nlm.nih.gov/gene/64532)
[GeneCards: MAP1LC3A](https://www.genecards.org/cgi-bin/carddisp.pl?gene=MAP1LC3A)

Overview

Background

The study of Map1Lc3A Protein 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.

References

[Kabeya Y, et al, LC3, a mammalian homolog of yeast Apg8p, is localized in autophagosome membranes (2000)](https://pubmed.ncbi.nlm.nih.gov/11082042/)

[Mizushima N, et al, Autophagy exploits life-or-death decisions (2011)](https://pubmed.ncbi.nlm.nih.gov/21193863/)

[Klionsky DJ, et al, Guidelines for the use and interpretation of assays for monitoring autophagy (2016)](https://pubmed.ncbi.nlm.nih.gov/26799652/)

[Lee Y, et al, Autophagy in Alzheimer's disease (2021)](https://pubmed.ncbi.nlm.nih.gov/32818577/)

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MAP1LC3A Protein

MAP1LC3A Protein

Overview

MAP1LC3A Protein

Overview

Introduction

Protein Overview

Normal Function

Molecular Mechanism

Processing and Forms

LIR Motif Interactions

Structural Features

Brain Expression

Disease Associations

Alzheimer's Disease

Parkinson's Disease

ALS

Huntington's Disease

Therapeutic Implications

Animal Models

Research Directions

See Also

External Links

Overview

Background

References