| KIF1B Protein | |
|---|---|
| Gene | [KIF1B](/genes/kif1b) |
| UniProt ID | [O60393](https://www.uniprot.org/uniprot/O60393) |
| PDB Structures | 3GJX, 4BM8, 5JD7 |
| Molecular Weight | ~204 kDa |
| Subcellular Localization | Cytoplasm, neuronal axons |
| Protein Family | Kinesin-3 family (KIF1) |
KIF1B Protein is a neuronal motor protein encoded by the KIF1B gene. It is essential for neuronal viability and function, mediating anterograde transport of synaptic vesicles, mitochondria, and other cargo along microtubules in neurons. This page describes its structure, normal nervous system function, role in neurodegenerative disease, and potential as a therapeutic target.
KIF1B belongs to the kinesin-3 family (KIF1), distinct from conventional kinesins in that it functions as a monomer and exhibits processive movement along microtubules. It was the first identified causative gene for axonal Charcot-Marie-Tooth disease (CMT2A), linking axonal transport defects to hereditary neuropathy. Research has also implicated KIF1B dysfunction in Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis (ALS).
KIF1B is a monomeric motor protein belonging to the kinesin-3 family:
Unlike conventional kinesins, KIF1B functions as a monomer and is processive, moving long distances along microtubules without dissociating.
KIF1B is essential for neuronal viability and function:
The protein is expressed predominantly in neuronal tissues and localizes to both axons and dendrites.
| Interactor | Interaction Type | Function |
|---|---|---|
| APP | Direct binding | Amyloid precursor protein transport |
| Mitochondria | Membrane association | Mitochondrial transport |
| Synaptic Vesicles | Cargo binding | Synaptic vesicle transport |
| MAP1B | Complex formation | Microtubule anchoring |
| 14-3-3 Proteins | Phosphorylation-dependent | Regulation of motor activity |
Zhao et al. [KIF1B mutations cause Charcot-Marie-Tooth disease type 2A](https://doi.org/10.1016/S0092-8674(01). Cell. 2001. ↩︎
Chen et al. KIF1B in Alzheimer's disease pathogenesis. Acta Neuropathologica Communications. 2023. ↩︎
Park et al. KIF1B and mitochondrial transport in Parkinson's disease. Movement Disorders. 2020. ↩︎
Morfini et al. Axonal transport defects in neurodegenerative disease. Nature Reviews Neurology. 2022. ↩︎