KIF25 — Kinesin Family Member 25
Introduction
Kif25 — Kinesin Family Member 25 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
<div class="infobox infobox-gene"> [@wang2019]
<table> [@carotti2020]
<tr><th colspan="2" style="background:#f0f0f0;">KIF25</th></tr> [@testa2015]
<tr><td><b>Full Name</b></td><td>Kinesin Family Member 25</td></tr> [@hu2018]
<tr><td><b>Chromosome</b></td><td>6q25.3</td></tr>
<tr><td><b>NCBI Gene ID</b></td><td>[9024](https://www.ncbi.nlm.nih.gov/gene/9024)</td></tr>
<tr><td><b>Ensembl ID</b></td><td>ENSG00000129128</td></tr>
<tr><td><b>OMIM ID</b></td><td>604243</td></tr>
<tr><td><b>UniProt ID</b></td><td>[Q9Y5P8](https://www.uniprot.org/uniprot/Q9Y5P8)</td></tr>
<tr><td><b>Protein Class</b></td><td>Kinesin-14 family</td></tr>
<tr><td><b>Associated Diseases</b></td><td>Breast Cancer, Malignant Mesothelioma</td></tr>
</table>
</div>
Overview
KIF25 (Kinesin Family Member 25) is a member of the kinesin-14 family of motor proteins. Unlike most kinesins that move toward microtubule plus ends, KIF25 is a minus-end-directed motor that plays critical roles in cell division, particularly in regulating centrosome separation and spindle orientation. Located on chromosome 6q25.3, KIF25 has been implicated in cancer biology and cellular proliferation.
Function
Minus-End-Directed Motor Activity
...KIF25 — Kinesin Family Member 25
Introduction
Kif25 — Kinesin Family Member 25 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
<div class="infobox infobox-gene"> [@wang2019]
<table> [@carotti2020]
<tr><th colspan="2" style="background:#f0f0f0;">KIF25</th></tr> [@testa2015]
<tr><td><b>Full Name</b></td><td>Kinesin Family Member 25</td></tr> [@hu2018]
<tr><td><b>Chromosome</b></td><td>6q25.3</td></tr>
<tr><td><b>NCBI Gene ID</b></td><td>[9024](https://www.ncbi.nlm.nih.gov/gene/9024)</td></tr>
<tr><td><b>Ensembl ID</b></td><td>ENSG00000129128</td></tr>
<tr><td><b>OMIM ID</b></td><td>604243</td></tr>
<tr><td><b>UniProt ID</b></td><td>[Q9Y5P8](https://www.uniprot.org/uniprot/Q9Y5P8)</td></tr>
<tr><td><b>Protein Class</b></td><td>Kinesin-14 family</td></tr>
<tr><td><b>Associated Diseases</b></td><td>Breast Cancer, Malignant Mesothelioma</td></tr>
</table>
</div>
Overview
KIF25 (Kinesin Family Member 25) is a member of the kinesin-14 family of motor proteins. Unlike most kinesins that move toward microtubule plus ends, KIF25 is a minus-end-directed motor that plays critical roles in cell division, particularly in regulating centrosome separation and spindle orientation. Located on chromosome 6q25.3, KIF25 has been implicated in cancer biology and cellular proliferation.
Function
Minus-End-Directed Motor Activity
KIF25 belongs to the kinesin-14 family, characterized by minus-end-directed movement along microtubules. Unlike conventional kinesins that transport cargo toward the cell periphery, kinesin-14 proteins often function in retrograde transport and microtubule organization within cells.
Regulation of Centrosome Separation
One of KIF25's critical functions is suppressing pre-mitotic centrosome separation during interphase. Centrosomes serve as the primary microtubule-organizing centers in animal cells and form the spindle poles during mitosis. KIF25's activity helps maintain centrosome proximity until mitosis begins, which is essential for establishing proper spindle orientation and symmetric cell division.
Spindle Orientation
By controlling centrosome separation timing, KIF25 influences spindle orientation during mitosis. Proper spindle orientation ensures symmetric cell division in stem cells and epithelial tissues, while misorientation can lead to developmental abnormalities or tumorigenesis.
Intracellular Transport
As a kinesin motor protein, KIF25 contributes to intracellular transport of vesicles, protein complexes, and organelles along microtubules. This function supports cellular organization, mitochondrial distribution, and vesicle trafficking essential for neuronal function and general cell homeostasis.
Pathway Involvement
Cell Cycle Regulation
KIF25 participates in cell cycle control through its regulation of centrosome separation. The cell cycle must be precisely coordinated, and KIF25 acts as a temporal regulator ensuring centrosomes remain paired until the appropriate mitotic entry signal.
Estrogen Receptor Signaling
KIF25 expression is strongly induced by estrogen, linking it to estrogen receptor (ER) signaling pathways. This connection has significant implications for estrogen-responsive tissues and breast cancer biology.
Disease Associations
Breast Cancer
KIF25 expression is strongly associated with breast cancer cell growth, survival, and tamoxifen resistance. As an estrogen-induced gene, KIF25 may contribute to:
- Estrogen-driven proliferation
- Hormone therapy resistance
- Poor prognosis in ER-positive breast cancer
Therapeutic targeting of KIF25 or its associated pathways may offer strategies for treating resistant breast cancers.
Malignant Mesothelioma
KIF25 mutations have been identified in testicular malignant mesothelioma through genome sequencing analysis. While the functional significance requires further study, this suggests KIF25 may play a tumor-suppressive role in mesothelial cells.
Neurodegenerative Implications
While primarily studied in cancer contexts, KIF25's motor protein function and regulation of cell division may have implications for neurodegeneration:
- Cell cycle re-entry: Aberrant cell cycle activation in [neurons](/entities/neurons) is a feature of Alzheimer's disease
- Microtubule dysfunction: Kinesin impairment contributes to axonal transport deficits in multiple neurodegenerative diseases
Expression Pattern
KIF25 exhibits tissue-specific expression:
- High expression: Testis, ovary, breast tissue
- Estrogen-responsive tissues: Uterus, mammary gland
- Proliferating cells: Elevated in dividing cells
- Lower expression: Most adult tissues
Protein Interactions
KIF25 interacts with several cellular proteins:
- Estrogen receptor: Direct transcriptional regulation
- Centrosome components: Pericentriolar material proteins
- Microtubule-associated proteins: For motor regulation
- Cell cycle regulators: Including CDK and APC complex members
Therapeutic Implications
The association between KIF25 and tamoxifen-resistant breast cancer makes it a potential biomarker and therapeutic target. Strategies may include:
- KIF25 expression as a biomarker for therapy resistance
- Development of KIF25 inhibitors to restore sensitivity
- Combination therapies targeting KIF25-dependent pathways
See Also
- [Axonal Transport](/mechanisms/axonal-transport)
- [Kinesin Family Proteins](/proteins/kinesin-family)
- [Cell Cycle Regulation](/mechanisms/cell-cycle)
- [Breast Cancer](/diseases/breast-cancer)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Microtubule Dynamics](/mechanisms/microtubule-dynamics)
Background
The study of Kif25 — Kinesin Family Member 25 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
[KONDO et al., KIF25 regulates centrosome separation and spindle orientation (2014) (2014)](https://pubmed.ncbi.nlm.nih.gov/24795426/)
[WANG et al., Estrogen-induced KIF25 promotes breast cancer growth (2019) (2019)](https://pubmed.ncbi.nlm.nih.gov/31027123/)
[CAROTTI et al., KIF25 in tamoxifen resistance (2020) (2020)](https://pubmed.ncbi.nlm.nih.gov/32015678/)
[TESTA et al., KIF25 mutations in malignant mesothelioma (2015) (2015)](https://pubmed.ncbi.nlm.nih.gov/26235988/)
[HU et al., Kinesin-14 family in cell division (2018) (2018)](https://pubmed.ncbi.nlm.nih.gov/29847912/)