NEK7 Gene
Overview
Mermaid diagram (expand to render)
NEK7 (NIMA-related kinase 7) is a serine/threonine kinase belonging to the NEK (Never in Mitosis A-related kinase) family. NEK7 has emerged as a critical mediator of [NLRP3](/genes/nlrp3) inflammasome activation, positioning it at the intersection of innate immunity and neuroinflammation. In the central nervous system, NEK7-dependent NLRP3 activation in [microglia](/cell-types/microglia) drives the release of pro-inflammatory cytokines [IL-1beta](/genes/il1b) and [IL-18](/genes/il18), contributing to neuronal damage in [Alzheimer's disease](/diseases/alzheimers-disease), [Parkinson's disease](/diseases/parkinsons-disease), and other neurodegenerative conditions.
<div class="infobox infobox-gene"> [@shi2016]
<div class="infobox-header">NEK7</div> [@sharif2019]
<table> [@heneka2013]
<tr><td class="infobox-label">Full Name</td><td>NIMA-related kinase 7</td></tr> [@gordon2018]
<tr><td class="infobox-label">Gene Symbol</td><td>NEK7</td></tr> [@ising2019]
<tr><td class="infobox-label">Chromosomal Location</td><td>1q31.3</td></tr> [@xu2021]
<tr><td class="infobox-label">NCBI Gene ID</td><td>[140609](https://www.ncbi.nlm.nih.gov/gene/140609)</td></tr> [@schmidburgk2016]
<tr><td class="infobox-label">Ensembl ID</td><td>[ENSG00000151414](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000151414)</td></tr>
<tr><td class="infobox-label">UniProt ID</td><td>[Q8TDX2](https://www.uniprot.org/uniprot/Q8TDX2)</td></tr>
<tr><td class="infobox-label">Protein</td><td>[NEK7 Protein](/proteins/nek7-protein)</td></tr>
<tr><td class="infobox-label">Associated Diseases</td><td>[Alzheimer's disease](/diseases/alzheimers-disease), [Parkinson's disease](/diseases/parkinsons-disease), [ALS](/diseases/amyotrophic-lateral-sclerosis), [Multiple Sclerosis](/diseases/multiple-sclerosis)</td></tr>
</table>
</div>
Function
NEK7 is a 34 kDa serine/threonine kinase that plays dual roles in cell biology:
Mitotic Functions
NEK7 participates in mitotic spindle assembly and cytokinesis. It is activated by [NEK9](/genes/nek9) during mitosis and phosphorylates downstream targets required for proper centrosome separation and bipolar spindle formation. NEK7 and the closely related [NEK6](/genes/nek6) share approximately 87% sequence identity in their kinase domains and have partially overlapping roles in cell division.
NLRP3 Inflammasome Activation
The most disease-relevant function of NEK7 is its role as an essential upstream mediator of [NLRP3](/genes/nlrp3) inflammasome assembly. NEK7 directly binds the leucine-rich repeat (LRR) domain and nucleotide-binding domain (NBD) of NLRP3 through its C-terminal kinase domain. This interaction is required for NLRP3 oligomerization, [ASC](/genes/pycard) speck formation, and subsequent [caspase-1](/genes/casp1) activation.
Key mechanistic details include:
- NEK7 acts downstream of potassium efflux, a common signal triggered by diverse NLRP3 stimuli (ATP, nigericin, particulate matter, mitochondrial reactive oxygen species)
- The NEK7-NLRP3 interaction is cell cycle-dependent: during interphase NEK7 is available for NLRP3 binding, but during mitosis it is sequestered for spindle functions — explaining why inflammasome activation is suppressed in dividing cells
- NEK7 kinase activity is dispensable for NLRP3 activation; the interaction is structural rather than catalytic
- Cryo-EM structures reveal that NEK7 bridges adjacent NLRP3 protomers in the inflammasome disc, facilitating oligomerization
Other Immune Functions
NEK7 also regulates mitochondrial homeostasis and [reactive oxygen species](/mechanisms/oxidative-stress) (ROS) production. Loss of NEK7 reduces mitochondrial [ROS](/entities/reactive-oxygen-species) generation, which itself is an upstream NLRP3 activating signal, creating a feed-forward loop in neuroinflammation.
Disease Associations
Alzheimer's Disease
[NLRP3 inflammasome](/entities/nlrp3-inflammasome) activation is a central driver of neuroinflammation in [Alzheimer's disease](/diseases/alzheimers-disease). [Amyloid-beta](/proteins/amyloid-beta) fibrils and oligomers activate NLRP3 in [microglia](/cell-types/microglia-neuroinflammation) through NEK7-dependent mechanisms:
- Aβ phagocytosis causes lysosomal damage and potassium efflux, triggering NEK7-NLRP3 complex formation
- NEK7-dependent IL-1β release promotes [tau](/proteins/tau) hyperphosphorylation through activation of kinases including [CDK5](/genes/cdk5) and [GSK3β](/genes/gsk3b)
- Genetic deletion of Nek7 in mouse microglia reduces Aβ-induced inflammasome activation and attenuates cognitive decline in AD mouse models
- NEK7 expression is elevated in postmortem AD brain tissue, particularly in plaque-associated microglia
Parkinson's Disease
In [Parkinson's disease](/diseases/parkinsons-disease), NEK7-NLRP3 signaling is activated by:
- Aggregated [α-synuclein](/proteins/alpha-synuclein) fibrils released from degenerating [dopaminergic neurons](/cell-types/dopaminergic-neurons)
- Mitochondrial dysfunction-derived ROS and oxidized mitochondrial DNA
- [LRRK2](/genes/lrrk2) gain-of-function mutations that enhance NLRP3 priming
- NEK7 knockdown in BV2 microglia reduces α-synuclein-induced IL-1β secretion by approximately 80%
Amyotrophic Lateral Sclerosis
Inflammasome activation contributes to motor neuron death in [ALS](/diseases/amyotrophic-lateral-sclerosis). [SOD1](/entities/sod1)-mutant microglia show enhanced NEK7-NLRP3 complex formation. [TDP-43](/genes/tardbp) aggregates also trigger NLRP3 through mechanisms involving mitochondrial damage and NEK7 recruitment.
Multiple Sclerosis
NEK7-dependent NLRP3 activation in microglia and infiltrating macrophages promotes demyelination in experimental autoimmune encephalomyelitis (EAE) models. IL-1β released through this pathway damages [oligodendrocytes](/cell-types/oligodendrocytes) and disrupts the [blood-brain barrier](/mechanisms/blood-brain-barrier).
Expression
NEK7 is ubiquitously expressed but shows notable enrichment in:
- Microglia: Highest CNS expression, consistent with inflammasome function
- [Astrocytes](/entities/astrocytes): Moderate expression; [astrocytic](/cell-types/astrocytes) NEK7 may contribute to A1 reactive astrocyte polarization
- [Neurons](/entities/neurons): Low expression; neuronal NEK7 primarily functions in cell cycle-related processes during development
- Peripheral immune cells: High expression in monocytes and macrophages
Allen Human Brain Atlas data shows NEK7 expression across all brain regions with enrichment in white matter tracts and areas with high microglial density.
Therapeutic Targeting
NEK7 represents an attractive therapeutic target for neuroinflammatory diseases:
- Small molecule inhibitors: Disrupting the NEK7-NLRP3 protein-protein interaction could selectively block inflammasome activation without affecting other innate immune pathways
- Antisense oligonucleotides: NEK7-targeting ASOs reduce inflammasome activation in preclinical models
- Downstream targets: [MCC950](/therapeutics/mcc950) (NLRP3 inhibitor) blocks the pathway downstream of NEK7 and has shown efficacy in AD and PD mouse models
- Combination approaches: NEK7 inhibition combined with anti-amyloid or anti-[tau](/proteins/tau) therapies may provide synergistic neuroprotection
See Also
- [NLRP3](/genes/nlrp3) — inflammasome sensor protein
- [PYCARD (ASC)](/genes/pycard) — inflammasome adaptor protein
- [Caspase-1](/genes/casp1) — inflammasome effector protease
- [IL-1β](/genes/il1b) — pro-inflammatory cytokine product
- [Neuroinflammation Pathway](/mechanisms/neuroinflammation-pathway)
External Links
- [NCBI Gene: NEK7](https://www.ncbi.nlm.nih.gov/gene/140609)
- [UniProt: Q8TDX2](https://www.uniprot.org/uniprot/Q8TDX2)
- [GeneCards: NEK7](https://www.genecards.org/cgi-bin/carddisp.pl?gene=NEK7)
- [OMIM: NEK7](https://www.omim.org/entry/606848)
- [Allen Brain Atlas: NEK7](https://human.brain-map.org/microarray/search/show?search_term=NEK7)
References
[He Y et al., NEK7 is an essential mediator of NLRP3 activation downstream of potassium efflux (2016) (2016)](https://doi.org/10.1038/nature16959)
[Shi H et al., NLRP3 activation and mitosis are mutually exclusive events coordinated by NEK7, a new inflammasome component (2016) (2016)](https://doi.org/10.1038/ni.3333)
[Sharif H et al., Structural mechanism for NEK7-licensed activation of NLRP3 inflammasome (2019) (2019)](https://doi.org/10.1038/s41586-019-1295-z)
[Heneka MT et al., NLRP3 is activated in Alzheimer's disease and contributes to pathology in APP/PS1 mice (2013) (2013)](https://doi.org/10.1038/nature11729)
[Gordon R et al., Inflammasome inhibition prevents α-synuclein pathology and dopaminergic neurodegeneration in mice (2018) (2018)](https://doi.org/10.1126/scitranslmed.aah4066)
[Ising C et al., NLRP3 inflammasome activation drives tau pathology (2019) (2019)](https://doi.org/10.1038/s41586-019-1769-z)
[Xu Z et al., NEK7 modulates NLRP3 inflammasome activation and neuroinflammation in experimental autoimmune encephalomyelitis (2021) (2021)](https://pubmed.ncbi.nlm.nih.gov/33657615/)
[Schmid-Burgk JL et al., A genome-wide CRISPR screen identifies NEK7 as an essential component of NLRP3 inflammasome activation (2016) (2016)](https://doi.org/10.1074/jbc.C115.700492)Pathway Diagram
The following diagram shows the key molecular relationships involving NEK7 Gene discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)