KIF13B

KIF13B

Introduction

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">KIF13B</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>KIF13B</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Kinesin Family Member 13B</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>8p21.3</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>[25803](https://www.ncbi.nlm.nih.gov/gene/25803)</td>
</tr>
<tr>
<td class="label">OMIM ID</td>
<td>[607349](https://www.omim.org/entry/607349)</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000102743</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>[Q9N2U8](https://www.uniprot.org/uniprot/Q9N2U8)</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>[Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease), [Schizophrenia](/diseases/schizophrenia), [Neurodegeneration](/diseases/neurodegeneration)</td>
</tr>
</table>

Kif13B is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

KIF13B

Introduction

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">KIF13B</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>KIF13B</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Kinesin Family Member 13B</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>8p21.3</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>[25803](https://www.ncbi.nlm.nih.gov/gene/25803)</td>
</tr>
<tr>
<td class="label">OMIM ID</td>
<td>[607349](https://www.omim.org/entry/607349)</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000102743</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>[Q9N2U8](https://www.uniprot.org/uniprot/Q9N2U8)</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>[Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease), [Schizophrenia](/diseases/schizophrenia), [Neurodegeneration](/diseases/neurodegeneration)</td>
</tr>
</table>

Kif13B is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

KIF13B (Kinesin Family Member 13B) is a member of the kinesin-3 family of motor proteins that facilitate intracellular vesicle trafficking along microtubule filaments. Unlike conventional kinesins that move toward microtubule plus ends, KIF13B participates in diverse cellular processes including endocytic pathway regulation, synaptic vesicle transport, dendrite morphogenesis, and membrane protein trafficking. In the nervous system, KIF13B plays critical roles in neuronal development, synapse formation, and the trafficking of proteins implicated in neurodegenerative diseases.

Molecular Function

Motor Protein Activity

KIF13B functions as a microtubule-based motor protein with the following characteristics:

• ATP-dependent movement: KIF13B hydrolyzes ATP to generate force for movement along microtubule tracks, typically moving toward the plus end of microtubules
• Processive motility: The protein can take numerous steps along the microtubule track without dissociating, making it efficient for long-range transport
• Cargo binding: KIF13B contains specific domains that recognize and bind to diverse cargo molecules, including vesicles, protein complexes, and membrane organelles

Domain Structure

KIF13B contains several key structural domains:

• N-terminal motor domain: Catalyzes ATP hydrolysis and microtubule binding
• Coiled-coil regions: Mediate dimerization and cargo binding
• FHA domain (Forkhead-associated): Protein-protein interactions
• C-terminal tail: Regulates cargo binding and localization

Phosphatidylinositol Binding

A unique feature of KIF13B is its ability to bind phosphatidylinositol-4,5-bisphosphate (PIP2), which:

• Targets KIF13B to specific membrane compartments
• Regulates its activity in response to phosphoinositide signaling
• Links KIF13B function to membrane trafficking pathways

Cellular Functions

Endocytic Pathway Regulation

KIF13B plays a central role in regulating the endocytic pathway:

• Early endosome trafficking: KIF13B transports cargo from the plasma membrane to early endosomes
• Endocytic recycling: The protein facilitates the return of internalized receptors and membranes to the plasma membrane
• Endolysosomal transport: KIF13B participates in trafficking between endosomal compartments

Neuronal Functions

In [neurons](/entities/neurons), KIF13B performs several critical functions:

Synaptic Vesicle Trafficking

Dendrite Morphogenesis

Synapse Formation

• Postsynaptic density proteins
• Neurotransmitter receptors
• Adhesion molecules

Disease Associations

Alzheimer's Disease

KIF13B has been implicated in Alzheimer's disease pathogenesis through several mechanisms:

• [Amyloid precursor protein](/entities/app-protein) (APP) trafficking: KIF13B mediates the axonal transport of APP, influencing its proteolytic processing and [amyloid-beta](/proteins/amyloid-beta) production[@kifb2011]
• Endocytic pathway alterations: Changes in KIF13B function may contribute to the endocytic deficits observed in AD neurons
• [Tau](/proteins/tau) pathology connection: KIF13B-mediated transport may be affected by tau aggregation, which disrupts microtubule-based transport

Parkinson's Disease

In Parkinson's disease, KIF13B is associated with:

• Synaptic vesicle transport: Impairment of KIF13B-mediated transport may contribute to synaptic dysfunction in PD
• [Alpha-synuclein](/proteins/alpha-synuclein) trafficking: KIF13B may participate in the intracellular trafficking of alpha-synuclein
• Mitochondrial quality control: KIF13B function may intersect with mitophagy pathways affected in PD

Schizophrenia

KIF13B has been genetically linked to schizophrenia:

• Genetic association studies: Polymorphisms in the KIF13B gene have been associated with schizophrenia risk
• Neuronal development: Altered KIF13B function may affect neural circuit formation during development
• Synaptic dysfunction: Changes in KIF13B-mediated trafficking may contribute to synaptic deficits observed in schizophrenia

Intellectual Disability

Biallelic mutations in KIF13B have been associated with:

• Developmental delay
• Intellectual disability
• Neurodevelopmental disorders

Expression Pattern

KIF13B exhibits high expression in the nervous system:

• Brain regions: Cerebral [cortex](/brain-regions/cortex), [hippocampus](/brain-regions/hippocampus), olfactory bulb, basal ganglia
• Cellular localization: Primarily neuronal, with expression in both axons and dendrites
• Developmental expression: Highest during embryonic development and early postnatal periods

Protein Interactions

KIF13B interacts with several key proteins:

• APP (Amyloid Precursor Protein): KIF13B directly transports APP along axons[@kifb2011]
• RAB proteins: Collaborates with RAB5 and RAB11 in endocytic trafficking
• MINT1/X11: Scaffold protein that links KIF13B to synaptic proteins
• DISC1: Disrupted in Schizophrenia 1 protein, implicated in neuronal development

Therapeutic Implications

Drug Target Potential

KIF13B represents a potential therapeutic target for:

• Neurodegenerative diseases: Modulating KIF13B activity could restore proper trafficking in AD and PD
• Neurodevelopmental disorders: Understanding KIF13B function may inform treatments for schizophrenia

Research Challenges

• Developing specific KIF13B modulators
• Understanding tissue-specific functions
• Identifying downstream effectors

See Also

• [Kinesin proteins](/proteins/kinesin-family-members)
• [Axonal transport](/mechanisms/axonal-transport)
• [Endocytic pathway](/mechanisms/endocytic-trafficking)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)

Background

The study of Kif13B 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.

External Links

• [PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
• [Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
• [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data

References