CERK Gene

CERK Gene

<div class="infobox infobox-gene">
<h3>CERK</h3>
<table>
<tr><th>Full Name</th><td>Ceramide Kinase</td></tr>
<tr><th>Gene Symbol</th><td>CERK</td></tr>
<tr><th>Chromosome</th><td>22q13.31</td></tr>
<tr><th>NCBI Gene ID</th><td>[54660](https://www.ncbi.nlm.nih.gov/gene/54660)</td></tr>
<tr><th>OMIM</th><td>[609250](https://omim.org/entry/609250)</td></tr>
<tr><th>Ensembl</th><td>[ENSG00000100324](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000100324)</td></tr>
<tr><th>UniProt</th><td>[Q8TCT0](https://www.uniprot.org/uniprot/Q8TCT0)</td></tr>
<tr><th>Encoded Protein</th><td>[CERK protein](/proteins/cerk-protein)</td></tr>
<tr><th>Associated Diseases</th><td>Alzheimer's disease, Stroke, Neuroinflammation, Cancer</td></tr>
</table>
</div>

Overview

CERK (Ceramide Kinase) encodes the enzyme that converts ceramide to ceramide-1-phosphate (C1P), a bioactive lipid mediator involved in cell proliferation, survival, inflammation, and membrane trafficking.[@sugiura2002] In the nervous system, CERK-C1P signaling modulates neuronal survival, microglial activation, and neuroinflammatory responses.[@olivera2013] Dysregulation of ceramide metabolism is increasingly recognized as contributing to neurodegeneration, with CERK positioned at a critical branchpoint between pro-apoptotic ceramide and pro-survival C1P signaling.

Gene Structure and Expression

The CERK gene spans approximately 82 kb on chromosome 22q13.31 and contains 11 exons.[@bornancin2002] The encoded 538-amino acid protein contains:

CERK Gene

<div class="infobox infobox-gene">
<h3>CERK</h3>
<table>
<tr><th>Full Name</th><td>Ceramide Kinase</td></tr>
<tr><th>Gene Symbol</th><td>CERK</td></tr>
<tr><th>Chromosome</th><td>22q13.31</td></tr>
<tr><th>NCBI Gene ID</th><td>[54660](https://www.ncbi.nlm.nih.gov/gene/54660)</td></tr>
<tr><th>OMIM</th><td>[609250](https://omim.org/entry/609250)</td></tr>
<tr><th>Ensembl</th><td>[ENSG00000100324](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000100324)</td></tr>
<tr><th>UniProt</th><td>[Q8TCT0](https://www.uniprot.org/uniprot/Q8TCT0)</td></tr>
<tr><th>Encoded Protein</th><td>[CERK protein](/proteins/cerk-protein)</td></tr>
<tr><th>Associated Diseases</th><td>Alzheimer's disease, Stroke, Neuroinflammation, Cancer</td></tr>
</table>
</div>

Overview

CERK (Ceramide Kinase) encodes the enzyme that converts ceramide to ceramide-1-phosphate (C1P), a bioactive lipid mediator involved in cell proliferation, survival, inflammation, and membrane trafficking.[@sugiura2002] In the nervous system, CERK-C1P signaling modulates neuronal survival, microglial activation, and neuroinflammatory responses.[@olivera2013] Dysregulation of ceramide metabolism is increasingly recognized as contributing to neurodegeneration, with CERK positioned at a critical branchpoint between pro-apoptotic ceramide and pro-survival C1P signaling.

Gene Structure and Expression

The CERK gene spans approximately 82 kb on chromosome 22q13.31 and contains 11 exons.[@bornancin2002] The encoded 538-amino acid protein contains:

• PH domain: Pleckstrin homology domain for membrane localization
• Diacylglycerol kinase domain: Catalytic domain with ATP-binding site
• C1 domain: Lipid-binding cysteine-rich region
• Calcium/calmodulin regulation: Calcium-dependent activation

Function

Ceramide to C1P Conversion

CERK catalyzes the phosphorylation of ceramide:[@wijesinghe2005]

C1P Signaling Functions

Ceramide-1-phosphate mediates multiple cellular processes:[@arana2010]

Neuroinflammation

CERK-C1P in neuroinflammatory responses:[@presa2016]

• Microglial activation: C1P promotes pro-inflammatory phenotype
• Cytokine production: Enhances IL-1β, TNF-α, IL-6 release
• COX-2 induction: Increases prostaglandin E2 synthesis
• [NLRP3 inflammasome](/entities/nlrp3-inflammasome): C1P can modulate inflammasome activation

Ceramide Balance

CERK determines the ceramide/C1P balance:[@gault2018]

| Pathway | Lipid | Cellular Effect |
|---------|-------|-----------------|
| Ceramide accumulation | Ceramide | [Apoptosis](/entities/apoptosis), ER stress, [autophagy](/entities/autophagy) |
| CERK activation | C1P | Survival, proliferation, inflammation |
| Sphingomyelin hydrolysis | Ceramide | Stress response |
| C1P phosphatase | Ceramide | Reversal of C1P effects |

Disease Associations

Alzheimer's Disease

CERK and ceramide dysregulation in AD:[@filippov2012]

• Elevated ceramide: Increased ceramide levels in AD brains
• CERK downregulation: Reduced C1P production
• [Aβ](/proteins/amyloid-beta) toxicity: Aβ promotes ceramide accumulation via nSMase2
• Synaptic dysfunction: Ceramide impairs synaptic transmission
• Therapeutic potential: CERK activation may shift balance toward survival

Stroke and Ischemia

CERK in cerebral ischemia:[@novgorodov2014]

• Neuroprotection: C1P provides neuroprotection in stroke models
• Inflammation modulation: Complex effects on post-stroke inflammation
• [Blood-brain barrier](/entities/blood-brain-barrier): C1P affects BBB integrity
• Timing-dependent: Early vs late effects may differ

Neuroinflammation

CERK in inflammatory conditions:[@van2014]

• Multiple sclerosis: Altered ceramide metabolism
• Traumatic brain injury: CERK upregulation post-injury
• Infection: CERK in neurotropic viral infections

Cancer

CERK in tumor biology:[@snider2013]

• Cell survival: C1P promotes cancer cell survival
• Proliferation: Mitogenic effects on tumor cells
• Therapeutic target: CERK inhibitors in development

Expression Profile

| Tissue | Expression Level | Notes |
|--------|------------------|-------|
| Hippocampus | High | Memory circuits, vulnerable in AD |
| Cerebral cortex | High | Cognitive function |
| [Microglia](/cell-types/microglia-neuroinflammation) | High | Inflammatory mediator |
| [Astrocytes](/entities/astrocytes) | Moderate | Support cells |
| Oligodendrocytes | Moderate | Myelin maintenance |

Common Variants

| Variant | dbSNP | Effect | Clinical Relevance |
|---------|-------|--------|-------------------|
| rs2240246 | NCBI | Intronic | Stroke susceptibility |
| rs2070874 | NCBI | 3' UTR | Gene expression modifier |
| rs8137581 | NCBI | Intronic | Inflammatory response modifier |

Therapeutic Implications

CERK Modulation

Approaches targeting CERK-C1P axis:[@mikami2022]

Challenges

• Dual roles: C1P has both pro-survival and pro-inflammatory effects
• Context dependence: Effects vary by cell type and disease stage
• Ceramide balance: Must consider overall sphingolipid homeostasis
• Blood-brain barrier: Need CNS-penetrant compounds

See Also

• [CERKL Gene](/genes/cerkl)
• [Sphingolipid Metabolism](/mechanisms/sphingolipid-metabolism)
• [Neuroinflammation](/mechanisms/neuroinflammation)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Cell Death Pathways](/mechanisms/cell-death-pathways)

External Links

• [GeneCards: CERK](https://www.genecards.org/cgi-bin/carddisp.pl?gene=CERK)
• [UniProt: Q8TCT0](https://www.uniprot.org/uniprot/Q8TCT0)
• [NCBI Gene: 54660](https://www.ncbi.nlm.nih.gov/gene/54660)

References