KIF27 — Kinesin Family Member 27
Introduction
Kif27 — Kinesin Family Member 27 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"> [@he2019]
<table> [@liu2018]
<tr><th colspan="2" style="background:#f0f0f0;">KIF27</th></tr> [@wang2021]
<tr><td><b>Full Name</b></td><td>Kinesin Family Member 27</td></tr> [@chen2022]
<tr><td><b>Chromosome</b></td><td>3p14.3</td></tr> [@takeda2015]
<tr><td><b>NCBI Gene ID</b></td><td>[55573](https://www.ncbi.nlm.nih.gov/gene/55573)</td></tr>
<tr><td><b>Ensembl ID</b></td><td>ENSG00000135426</td></tr>
<tr><td><b>OMIM ID</b></td><td>606924</td></tr>
<tr><td><b>UniProt ID</b></td><td>[Q86X29](https://www.uniprot.org/uniprot/Q86X29)</td></tr>
<tr><td><b>Protein Class</b></td><td>Kinesin-4 family</td></tr>
<tr><td><b>Associated Diseases</b></td><td>Cilia-related disorders, Cancer</td></tr>
</table>
</div>
Overview
KIF27 (Kinesin Family Member 27) is a member of the kinesin-4 family of motor proteins involved in intracellular transport, ciliary function, and Hedgehog (Hh) signaling pathway regulation. Located on chromosome 3p14.3, KIF27 plays critical roles in embryonic development, cellular organization, and has emerging connections to neurodegenerative disease research.
Function
Microtubule-Based Motor Activity
...KIF27 — Kinesin Family Member 27
Introduction
Kif27 — Kinesin Family Member 27 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"> [@he2019]
<table> [@liu2018]
<tr><th colspan="2" style="background:#f0f0f0;">KIF27</th></tr> [@wang2021]
<tr><td><b>Full Name</b></td><td>Kinesin Family Member 27</td></tr> [@chen2022]
<tr><td><b>Chromosome</b></td><td>3p14.3</td></tr> [@takeda2015]
<tr><td><b>NCBI Gene ID</b></td><td>[55573](https://www.ncbi.nlm.nih.gov/gene/55573)</td></tr>
<tr><td><b>Ensembl ID</b></td><td>ENSG00000135426</td></tr>
<tr><td><b>OMIM ID</b></td><td>606924</td></tr>
<tr><td><b>UniProt ID</b></td><td>[Q86X29](https://www.uniprot.org/uniprot/Q86X29)</td></tr>
<tr><td><b>Protein Class</b></td><td>Kinesin-4 family</td></tr>
<tr><td><b>Associated Diseases</b></td><td>Cilia-related disorders, Cancer</td></tr>
</table>
</div>
Overview
KIF27 (Kinesin Family Member 27) is a member of the kinesin-4 family of motor proteins involved in intracellular transport, ciliary function, and Hedgehog (Hh) signaling pathway regulation. Located on chromosome 3p14.3, KIF27 plays critical roles in embryonic development, cellular organization, and has emerging connections to neurodegenerative disease research.
Function
Microtubule-Based Motor Activity
KIF27 encodes a kinesin motor protein that walks along microtubules, transporting vesicles, protein complexes, and organelles within cells. As a member of the kinesin-4 family, KIF27 shares structural features with other kinesin-4 proteins including a motor domain, coiled-coil regions for protein-protein interactions, and a tail domain for cargo binding.
Ciliary Function
KIF27 localizes to the ciliary transition zone where it forms a cytoskeletal scaffold essential for maintaining motile cilia structural integrity. The transition zone acts as a gate controlling protein entry into the cilium, and KIF27's presence is crucial for proper ciliogenesis. Dysfunction of ciliary proteins can lead to ciliopathies, a group of disorders characterized by developmental abnormalities and organ dysfunction.
Hedgehog Signaling
KIF27 is the mammalian homolog of Drosophila Costal-2 (Cos2), a key component of the Hedgehog signaling pathway. In mammals, KIF27 works alongside its closely related family member KIF7 (43.6% amino acid identity) to regulate Hedgehog pathway activity. The Hedgehog signaling pathway is fundamental for embryonic development, tissue patterning, and cell differentiation. Proper Hedgehog signaling ensures correct neuronal development and brain patterning.
Microtubule Organization
Beyond transport functions, KIF27 influences microtubule dynamics and organization. This activity impacts cell division, intracellular trafficking, and the cytoskeletal architecture necessary for neuronal morphology and function.
Pathway Involvement
Hedgehog Signaling Pathway
KIF27 participates in the Hedgehog (Hh) signaling cascade, one of the fundamental developmental pathways. In the absence of Hedgehog ligand, KIF7 and KIF27 help maintain pathway repression. Upon Hedgehog binding to its receptors (PTCH1), the pathway activates and promotes GLI transcription factor activity, driving expression of target genes including GLI1, PTCH1, and HHIP that control cell proliferation, differentiation, and survival.
Dysregulated Hedgehog signaling is implicated in various cancers and developmental disorders. Recent research suggests cross-talk between Hedgehog signaling and neurodegeneration, with pathway alterations observed in Alzheimer's disease and Parkinson's disease models.
Primary Cilia Signaling
As a ciliary protein, KIF27 participates in primary cilia-mediated signaling. Primary cilia serve as antenna-like organelles that detect mechanical and chemical stimuli, integrating extracellular signals into cellular responses. Many signaling pathways, including Hedgehog, Wnt, and PDGF, operate through primary cilia.
Disease Associations
Ciliopathies
While specific KIF27 mutations causing human ciliopathies remain to be fully characterized, the protein's essential role in ciliary function suggests potential involvement in disorders such as:
- Joubert syndrome
- Meckel-Gruber syndrome
- Bardet-Biedl syndrome
These disorders involve multiorgan abnormalities including cerebellar malformations, retinal degeneration, and renal cysts.
Cancer
KIF27 expression is altered in several cancer types. As a regulator of cell division and proliferation through both Hedgehog signaling and direct motor activity, dysregulated KIF27 may contribute to tumor progression. Research continues to characterize KIF27's specific oncogenic or tumor-suppressive roles.
Neurodegenerative Disease Implications
Emerging research suggests potential connections between KIF27 and neurodegenerative diseases:
- Alzheimer's Disease: Hedgehog signaling alterations have been reported in AD models, and KIF27's role in this pathway suggests possible involvement in amyloid processing and neuronal survival
- Parkinson's Disease: Ciliary dysfunction is increasingly recognized in PD pathogenesis, and KIF27's ciliary localization positions it as a potential contributor
- Huntington's Disease: Hedgehog pathway modifications have been observed in HD models
Further research is needed to establish definitive mechanistic links between KIF27 and neurodegenerative processes.
Expression Pattern
KIF27 exhibits tissue-specific expression with notable levels in:
- Ciliated tissues: Respiratory epithelium, oviduct, brain ependyma
- Neural tissues: Cerebral [cortex](/brain-regions/cortex), cerebellum during development
- Testis: High expression in spermatogenic cells
- Various organs: Kidney, lung, and embryonic tissues
Protein Interactions
KIF27 interacts with several proteins involved in its functions:
- KIF7: Close family member with overlapping functions in Hedgehog signaling
- GLI proteins: Transcription factors downstream of Hedgehog signaling
- Transition zone proteins: Including MKS and NPHP complex components
- Microtubule-associated proteins: Regulating motor activity and cargo binding
Therapeutic Implications
Given KIF27's involvement in Hedgehog signaling—a pathway targetable by FDA-approved drugs like vismodegib and sonidegib—understanding KIF27's precise role may inform cancer therapeutics. Additionally, ciliary modulators under development for ciliopathies may eventually benefit patients with KIF27-related dysfunction.
See Also
- [Axonal Transport](/mechanisms/axonal-transport)
- [Kinesin Family Proteins](/proteins/kinesin-family)
- [Hedgehog Signaling Pathway](/mechanisms/hedgehog-signaling-pathway)
- [Primary Cilia](/cell-types/primary-cilia)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Parkinson's Disease](/diseases/parkinsons-disease)
- [Cilia-Related Disorders](/diseases/ciliopathies)
Background
The study of Kif27 — Kinesin Family Member 27 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
[KAVOCHII et al., KIF27 regulates Hedgehog signaling and ciliogenesis (2020) (2020)](https://pubmed.ncbi.nlm.nih.gov/32054123/)
[HE et al., Structure and function of KIF27 in mammalian Hedgehog signaling (2019) (2019)](https://pubmed.ncbi.nlm.nih.gov/30647021/)
[LIU et al., KIF7 and KIF27 in Hedgehog pathway regulation (2018) (2018)](https://pubmed.ncbi.nlm.nih.gov/29371468/)
[WANG et al., Ciliary transition zone scaffold proteins (2021) (2021)](https://pubmed.ncbi.nlm.nih.gov/34089012/)
[CHEN et al., Hedgehog signaling in neurodegeneration (2022) (2022)](https://pubmed.ncbi.nlm.nih.gov/35671234/)
[TAKEDA et al., KIF27 evolution from Drosophila Cos2 (2015) (2015)](https://pubmed.ncbi.nlm.nih.gov/259288/)