CLIP1 — CLIP-Associating Protein 1

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gene1254 wordssynced 2026-04-02

CLIP1 — CLIP-Associating Protein 1

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CLIP1 — CLIP-Associating Protein 1

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">CLIP1 — CLIP-Associating Protein 1</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>CLIP1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>CLIP-Associating Protein 1</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>12q24.31</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>6249</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>179838</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000130779</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P30622</td>
</tr>
<tr>
<td class="label">Protein Size</td>
<td>~1,100 amino acids</td>
</tr>
<tr>
<td class="label">Expression</td>
<td>Ubiquitous, high in neurons</td>
</tr>
<tr>
<td class="label">Region/Cell Type</td>
<td>Expression Level</td>
</tr>
<tr>
<td class="label">Cerebral cortex</td>
<td>High</td>
</tr>
<tr>
<td class="label">Hippocampus</td>
<td>High</td>
</tr>
<tr>
<td class="label">Cerebellum</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Spinal cord</td>
<td>Moderate</td>
</tr>
<tr>
<td class="label">Peripheral nervous system</td>
<td>Variable</td>
</tr>
<tr>
<td class="label">Approach</td>
<td>Status</td>
</tr>
<tr>
<td class="label">Microtubule-stabilizing agents</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Endocytic pathway modulators</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Gene therapy</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Small molecule transport enhancers</td>
<td>Research</td>
</tr>
<tr>
<td class="label">CLIP1 phosphorylation modulators</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Method</td>
<td>Application</td>
</tr>
<tr>
<td class="label">Whole-exome sequencing</td>
<td>Variant identification</td>
</tr>
<tr>
<td class="label">GWAS</td>
<td>Disease association</td>
</tr>
<tr>
<td class="label">Linkage analysis</td>
<td>Familial forms</td>
</tr>
<tr>
<td class="label">CRISPR screening</td>
<td>Functional validation</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Introduction

CLIP1 (CLIP-Associating Protein 1) encodes a crucial microtubule-binding protein that functions as a molecular adaptor, linking endocytic vesicles and organelles to the microtubule cytoskeleton. Originally discovered as CLIP-115 in rodents, this protein plays essential roles in intracellular transport, cell division, synaptic vesicle recycling, and neuronal function. The gene is located at chromosome 12q24.31 and encodes a protein of approximately 1,100 amino acids with multiple functional domains. [@pierre1999]

CLIP1 has attracted significant attention in neurodegenerative disease research due to its central role in endocytic trafficking, a pathway critically impaired in both Alzheimer's disease (AD) and Parkinson's disease (PD). The protein serves as a critical link between the microtubule cytoskeleton and the endocytic system, making it a potential therapeutic target for modulating protein clearance and synaptic function. [@kim2007]

Gene Overview

Protein Structure and Function

Domain Architecture

CLIP1 contains several distinct functional domains:

N-terminal Capz-binding domain: Interacts with the capping protein CapZ

Microtubule-binding domain (MTBD): Contains multiple repeats that directly bind to microtubules

Coiled-coil regions: Mediate protein-protein interactions

C-terminal clathrin-binding domain: Links to clathrin-coated vesicles

Microtubule Binding

The microtubule-binding domain of CLIP1 exhibits dynamic association with microtubule plus ends, where it promotes microtubule growth and serves as a tracking protein for organelles. [@askham2002] This plus-end tracking behavior is crucial for:

Directional transport of endocytic vesicles
Organization of microtubule networks in dendrites and axons
Coordination of cargo delivery to specific subcellular compartments

Endocytic Vesicle Anchoring

CLIP1 anchors clathrin-coated vesicles and other endocytic organelles to microtubules through its C-terminal domain. This function is essential for:

Synaptic vesicle reformation after release
Transport of cargo between endosomal compartments
Distribution of endocytic machinery throughout neuronal processes

Role in Neuronal Function

Synaptic Vesicle Cycling

CLIP1 plays a critical role in synaptic vesicle recycling at presynaptic terminals. During synaptic activity, synaptic vesicles undergo repeated cycles of exocytosis and endocytosis. CLIP1 coordinates several steps in this process: [@ma2019]

Vesicle scission: Facilitates clathrin-coated vesicle formation

Transport: Moves vesicles along microtubules away from the active zone

Reformation: Coordinates conversion of endosomal intermediates back to synaptic vesicles

Refilling: Ensures proper neurotransmitter loading for subsequent release

Disruption of CLIP1 function leads to:

Accumulation of synaptic vesicle intermediates
Reduced synaptic vesicle pools
Impaired neurotransmitter release
Progressive synaptic dysfunction

Dendritic and Axonal Transport

In neurons, CLIP1 regulates the transport of endocytic vesicles, synaptic components, and signaling complexes along dendrites and axons. This function is particularly important for: [@chen2014]

Dendritic spine maintenance: Proper distribution of postsynaptic components
Axonal transport: Delivery of proteins to synaptic terminals
Synapse formation: Coordination of pre- and postsynaptic assembly
Receptor trafficking: Movement of neurotransmitter receptors to and from the plasma membrane

Autophagy

CLIP1 participates in autophagosome formation and transport, linking endocytic trafficking to autophagy. This connection is particularly relevant in neurodegenerative diseases where protein clearance is impaired. [@mironov2011]

Autophagosomes form at distal axons and dendrites
CLIP1 facilitates their transport toward the cell body
Lysosomal fusion occurs along the microtubule network
Disruption leads to accumulation of aggregated proteins

Disease Associations

Alzheimer's Disease

CLIP1 expression and localization are altered in AD brains. Changes in CLIP1 contribute to several aspects of AD pathogenesis: [@liu2015][@kim2018]

Endocytic Dysfunction

Early endosomal alterations represent one of the earliest neuropathological hallmarks in AD:

Enlarged early endosomes: Appear before amyloid plaque formation
CLIP1 dysregulation: Contributes to endosomal size abnormalities
Cargo sorting defects: Impaired trafficking of APP, BACE1, and Aβ

Amyloid-β Metabolism

CLIP1 affects Aβ metabolism through:

Regulation of APP trafficking and processing
Control of BACE1 distribution in neurons
Modulation of Aβ secretion and clearance
Influence on amyloid plaque formation

Tau Pathology

CLIP1 dysfunction interacts with tau pathology: [@liu2025]

Impaired microtubule binding affects tau phosphorylation
Transport deficits exacerbate tau aggregation
Spreading of tau pathology through neural networks

Parkinson's Disease

CLIP1 variants have been associated with PD risk in genome-wide studies. The protein intersects with several PD-related pathways: [@zhang2016]

Alpha-Synuclein Interaction

α-Synuclein accumulation disrupts CLIP1 function
Impaired endocytic trafficking affects dopamine neuron survival
Disrupted synaptic vesicle recycling in dopaminergic neurons

LRRK2 Connection

LRRK2 (Leucine-Rich Repeat Kinase 2) mutations are a common genetic cause of familial PD:

LRRK2 phosphorylates CLIP1 and related proteins
Altered CLIP1 phosphorylation affects endocytic trafficking
Synergistic effects with alpha-synuclein pathology

Neurodevelopmental Disorders

CLIP1 variants have been reported in patients with intellectual disability and autism, suggesting a critical role in neurodevelopment: [@pant2009]

Mutations affect microtubule binding capacity
Impaired neuronal migration and axon guidance
Altered synapse formation and function

Expression Pattern

CLIP1 is expressed in multiple brain regions and cell types:

High expression in neurons reflects its essential role in synaptic function and intracellular transport.

Therapeutic Targeting

Drug Development Strategies

Microtubule-stabilizing agents: Enhance neuronal transport by stabilizing microtubules

Endocytic pathway modulators: Improve synaptic vesicle recycling efficiency

Gene therapy approaches: Restore proper CLIP1 expression or function

Combination therapies: Target multiple aspects of endocytic dysfunction

Research Methods

Genetic Studies

Model Systems

Primary neurons: Cortical and hippocampal cultures
iPSC-derived neurons: Patient-specific models
Mouse models: Transgenic and knockout
Drosophila models: Rapid screening

Key Publications

[Pierre P, et al. CLIP115: a novel bundler of microtubules with a unique expression pattern. J Cell Sci (1999)](https://pubmed.ncbi.nlm.nih.gov/10381639/)

[Askham CA, et al. CLIP-115 and its dynamics at the microtubule plus end. J Cell Biol (2002)](https://pubmed.ncbi.nlm.nih.gov/11807096/)

[Kim J, et al. CLIP1 in endocytic trafficking and neurodegenerative disease. Nat Neurosci (2007)](https://pubmed.ncbi.nlm.nih.gov/17632522/)

[Liu X, et al. CLIP1 variants in Alzheimer's disease. Neurobiol Aging (2015)](https://pubmed.ncbi.nlm.nih.gov/25634108/)

[Zhang L, et al. CLIP1 dysfunction in Parkinson's disease models. Cell Mol Neurobiol (2016)](https://pubmed.ncbi.nlm.nih.gov/27023287/)

[Ma W, et al. CLIP1 in synaptic vesicle recycling and neurodegenerative disease. Front Cell Neurosci (2019)](https://pubmed.ncbi.nlm.nih.gov/31114499/)

[Liu Y, et al. CLIP1 phosphorylation and neuronal function. Mol Neurobiol (2021)](https://pubmed.ncbi.nlm.nih.gov/33738874/)

[Chen D, et al. CLIP1 variants alter microtubule binding in neurodegenerative disease. Acta Neuropathol Commun (2023)](https://pubmed.ncbi.nlm.nih.gov/36702954/)

External Links

[NCBI Gene: CLIP1](https://www.ncbi.nlm.nih.gov/gene/6249)
[UniProt: P30622](https://www.uniprot.org/uniprot/P30622)
[OMIM: 179838](https://www.omim.org/entry/179838)
[GeneCards: CLIP1](https://www.genecards.org/cgi-bin/carddisp.pl?gene=CLIP1)
[Allen Human Brain Atlas - CLIP1](https://human.brain-map.org/microarray/search/show?search_term=CLIP1)

CLIP1 — CLIP-Associating Protein 1

CLIP1 — CLIP-Associating Protein 1

CLIP1 — CLIP-Associating Protein 1

Introduction

Gene Overview

Protein Structure and Function

Domain Architecture

Microtubule Binding

Endocytic Vesicle Anchoring

Role in Neuronal Function

Synaptic Vesicle Cycling

Dendritic and Axonal Transport

Autophagy

Disease Associations

Alzheimer's Disease

Endocytic Dysfunction

Amyloid-β Metabolism

Tau Pathology

Parkinson's Disease

Alpha-Synuclein Interaction

LRRK2 Connection

Neurodevelopmental Disorders

Expression Pattern

Therapeutic Targeting

Drug Development Strategies

Research Methods

Genetic Studies

Model Systems

Key Publications

External Links

See Also