KDM6A Gene

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KDM6A Gene

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KDM6A Gene

Overview

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KDM6A Gene

Overview

Mermaid diagram (expand to render)

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">KDM6A Gene</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>KDM6A</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>KDM6A</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Gene</td>
</tr>
<tr>
<td class="label">NCBI</td>
<td><a href="https://www.ncbi.nlm.nih.gov/gene/?term=KDM6A" target="_blank">Search NCBI</a></td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/carcinoma" style="color:#ef9a9a">Carcinoma</a>, <a href="/wiki/glioblastoma" style="color:#ef9a9a">Glioblastoma</a></td>
</tr>
<tr>
<td class="label">SciDEX Hypotheses</td>
<td><a href="/hypothesis/h-881362dc" style="color:#ce93d8" title="Score: 0.37">KDM6A-Mediated H3K27me3 Rejuvenation...</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">80 edges</a></td>
</tr>
</table>

KDM6A (Lysine Specific Demethylase 6A), also known as UTX (Ubiquitously Transcribed X chromosome tetratricopeptide repeat containing), is a histone demethylase that catalyzes the removal of methyl groups from trimethylated lysine 27 on histone H3 (H3K27me3)[@kooistra2012]. This epigenetic enzyme is a key regulator of gene expression during development, cellular differentiation, and disease processes. KDM6A belongs to the UTX family of Jumonji C domain-containing demethylases and requires iron (Fe2+) and 2-oxoglutarate as cofactors for its catalytic activity.

In the nervous system, KDM6A plays critical roles in neurodevelopment, synaptic plasticity, and neuronal survival. The enzyme regulates chromatin accessibility at gene promoters and enhancers, thereby controlling the expression of genes essential for neuronal differentiation, learning and memory, and response to cellular stress. Dysregulation of KDM6A has been implicated in multiple neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson's disease (PD), and neurodevelopmental disorders such as Kabuki syndrome and Rett syndrome["@huang2019"].

Gene and Protein Structure

Gene Organization

The human KDM6A gene is located on the X chromosome at Xp11.3 and spans approximately 230 kilobases. The gene contains 29 exons and encodes a protein of 1,401 amino acids with a molecular weight of approximately 160 kDa. Notably, KDM6A escapes X-inactivation in females due to partial escape from silencing, resulting in biallelic expression in some tissues.

Protein Domains

The KDM6A protein contains several functional domains:

Jumonji C (JmjC) domain: The catalytic domain (~250 amino acids) containing the HxD...H motif required for Fe²⁺ binding and 2-oxoglutarate coordination

Tetratricopeptide repeat (TPR) domain: Located at the N-terminus, mediates protein-protein interactions

TxG-rich regions: Involved in transcriptional activation

Nuclear localization signals (NLS): Directs nuclear import

Interaction domains: For binding to transcription factors and chromatin remodeling complexes

Orthologs and Evolution

KDM6A is highly conserved across vertebrates. The mouse ortholog (Kdm6a) shares 96% identity with the human protein. Drosophila has a related gene, dUTX, which also functions in development.

Biological Functions

Histone Demethylase Activity

KDM6A specifically removes the trimethyl group from H3K27me3, converting it to H3K27me2 or H3K27me1[@kooistra2012]:

H3K27me3 →(KDM6A)→ H3K27me2 →(KDM6A)→ H3K27me1

This activity is part of the dynamic regulation of histone methylation states, where H3K27me3 is typically associated with gene silencing. By removing this mark, KDM6A promotes gene activation, particularly at enhancers and promoters of development-specific genes.

Regulation of Gene Expression

KDM6A regulates gene expression through:

Direct demethylation: Removing repressive H3K27me3 marks from target gene promoters
Complex formation: Interacting with the MLL3/4 COMPASS complexes to activate gene transcription
Chromatin remodeling: Recruiting co-activators and facilitating enhancer-promoter interactions
Developmental gene networks: Controlling Hox genes and other developmental regulators

Cellular Functions

In neurons and neural precursors, KDM6A regulates:

Neural progenitor cell differentiation: Timing of neuronal versus glial differentiation[@park2020]
Synaptic plasticity: Expression of synaptic proteins and plasticity-related genes[@chen2020]
Memory formation: Consolidation of long-term memory through chromatin remodeling[@park2021]
Stress response: Regulation of genes involved in cellular stress and survival
Neuroinflammation: Control of inflammatory gene expression in microglia[@ito2022]

Expression in the Nervous System

Brain Region Expression

KDM6A is expressed throughout the brain with particularly high levels in:

[Hippocampus](/brain-regions/hippocampus) — CA1-CA3 pyramidal neurons, dentate gyrus granule cells
Cerebral [cortex](/brain-regions/cortex) — all layers, particularly layer V pyramidal neurons
[Cerebellum](/brain-regions/cerebellum) — Purkinje cells, granule cells
[Substantia nigra](/brain-regions/substantia-nigra) — dopaminergic neurons
[Striatum](/brain-regions/striatum) — medium spiny neurons

Cellular Expression

Neurons: High expression in excitatory and inhibitory neurons
Neural progenitor cells: Critical for differentiation timing
Astrocytes: Moderate expression, role in astrocyte function
Microglia: Expression in microglia, regulating inflammatory responses[@ito2022]

Developmental Regulation

KDM6A expression is dynamically regulated:

Embryonic development: High expression in neural tube and developing brain
Postnatal: Moderate expression with region-specific patterns
Aging: Altered expression in aged brain, potentially contributing to cognitive decline[@jiang2021]

Role in Neurodegenerative Diseases

Alzheimer's Disease

KDM6A is significantly implicated in AD pathophysiology through multiple mechanisms[@choi2020]:

Amyloid-beta pathology:

KDM6A deficiency accelerates amyloid-beta accumulation
Altered expression of APP processing enzymes
Dysregulated autophagy related to amyloid clearance

Tau pathology:

KDM6A regulates tau phosphorylation through epigenetic mechanisms[@liu2020]
H3K27me3 dysregulation at tau-related gene promoters
Contribution to neurofibrillary tangle formation

Synaptic dysfunction:

KDM6A deficiency leads to reduced synaptic protein expression[@chen2020]
Impaired synaptic plasticity and memory formation[@park2021]
Synaptic loss in AD models

Neuroinflammation:

KDM6A in microglia regulates inflammatory gene expression[@ito2022]
Altered cytokine production in AD brain
Therapeutic potential of microglial KDM6A modulation[@suzuki2022]

Therapeutic implications:

Small molecule activators of KDM6A show neuroprotective effects[@wu2022]
Preclinical validation of KDM6A-targeted approaches[@matsumoto2021]
Combined targeting of amyloid and epigenetic pathways

Parkinson's Disease

In PD, KDM6A plays important roles[@martinez2021]:

Dopaminergic neuron survival:

KDM6A deficiency in dopaminergic neurons contributes to PD pathology[@lee2022]
Altered expression of survival-related genes
Mitochondrial dysfunction related to KDM6A dysregulation

Oxidative stress:

KDM6A regulates antioxidant gene expression
Vulnerability to oxidative stress in PD
Interaction with mitochondrial quality control pathways

Neuroinflammation:

Glial KDM6A modulates neuroinflammation in PD
Potential therapeutic target for modulating glial responses

Neurodevelopmental Disorders

Kabuki Syndrome:

KDM6A is one of the two genes (alongside KDM6B) mutated in Kabuki syndrome[@wang2021]
Haploinsufficiency leads to characteristic neurodevelopmental features
Intellectual disability, facial dysmorphism, and developmental delay
Neural crest development defects related to KDM6A function[@kelley2019]

Rett Syndrome:

KDM6A deficiency contributes to Rett syndrome phenotypes[@kim2019]
Dysregulated synaptic gene expression
Impaired neuronal connectivity

Other conditions:

Developmental delays and intellectual disability
Autism spectrum disorder associated features
Epilepsy in some patients

Molecular Mechanisms

Signaling Pathways

KDM6A interacts with several signaling pathways:

Notch signaling: KDM6A regulates Notch target gene expression
Wnt/β-catenin: Modulates Wnt target gene activation
p53 pathway: Interacts with p53-mediated transcription
NF-κB: Regulates inflammatory gene expression
MAPK/ERK: Activity modulates neuronal survival

Protein Interactions

KDM6A interacts with multiple protein complexes:

MLL3/4 COMPASS complexes: H3K4 methyltransferases for gene activation
UTAF1 complex: Novel complex for H3K27 demethylation
SWI/SNF complexes: Chromatin remodeling for accessibility
Transcription factors: Direct interaction with tissue-specific factors

Epigenetic Regulation

KDM6A-mediated H3K27me3 demethylation affects:

Enhancer activation: Opening of cell-type specific enhancers
Polycomb replacement: Counteracting PRC2-mediated silencing
Developmental timing: Coordinating gene expression programs
Disease-specific patterns: Aberrant H3K27me3 in neurodegeneration

Therapeutic Implications

Therapeutic Targets

KDM6A represents a promising therapeutic target for neurodegenerative diseases[@shin2022]:

KDM6A activators: Small molecules that enhance KDM6A activity

Epigenetic modulators: Broader epigenetic drugs affecting KDM6A pathways

Gene therapy: Viral vector-mediated KDM6A expression

Combination approaches: Combined with anti-amyloid or anti-tau strategies

Drug Development

Several strategies are being explored[@wu2022]:

Small molecule activators: Development of KDM6A-specific activators
Natural compounds: Investigation of dietary polyphenols
Targeted delivery: Nanoparticle-based delivery to neurons
Biomarker development: Identifying patients who may benefit from KDM6A-targeted therapy

Challenges and Considerations

Broad substrate specificity: KDM6A affects many genes
X-chromosome location: Implications for dosing and side effects
Tissue-specific delivery: Ensuring CNS penetration
Biomarker development: Patient selection for clinical trials

Key Research Findings

KDM6A is required for neural crest development and its deficiency causes Kabuki syndrome phenotypes[@kelley2019]

UTX-mediated demethylation regulates neuronal differentiation and developmental timing[@pessler2019]

KDM6A deficiency accelerates neurodegeneration in AD models[@choi2020]

KDM6A activity is required for synaptic plasticity and memory formation[@park2021]

KDM6A regulates neuroinflammation through H3K27me3 demethylation in microglia[@ito2022]

KDM6A mutation in Kabuki syndrome leads to neurodevelopmental deficits[@wang2021]

KDM6A regulates tau pathology through epigenetic mechanisms in AD[@liu2020]

KDM6A deficiency in dopaminergic neurons contributes to PD pathology[@lee2022]

Small molecule activators of KDM6A show neuroprotective effects in preclinical models[@wu2022]

Cross-References

[Histone Methylation Mechanisms](/mechanisms/histone-methylation)
[Epigenetics in Neurodegeneration](/mechanisms/epigenetics-neurodegeneration)
[Chromatin Remodeling](/mechanisms/chromatin-remodeling)
[Alzheimer's Disease](/diseases/alzheimers-disease)
[Parkinson's Disease](/diseases/parkinsons-disease)
[Kabuki Syndrome](/diseases/kabuki-syndrome)
[KDM6B Gene](/genes/kdm6b)
[MLL3 Gene](/genes/mll3)
[MLL4 Gene](/genes/mll4)

External Links

[NCBI Gene: KDM6A](https://www.ncbi.nlm.nih.gov/gene/7403)
[UniProt: UTX (O43509)](https://www.uniprot.org/uniprot/O43509)
[OMIM: 300128](https://www.omim.org/entry/300128)
[Ensembl: ENSG00000102038](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000102038)
[GeneCards: KDM6A](https://www.genecards.org/cgi-bin/carddisp.pl?gene=KDM6A)
[PubMed: KDM6A neurodegeneration](https://pubmed.ncbi.nlm.nih.gov/?term=KDM6A+Alzheimer+OR+KDM6A+Parkinson)

References

[Kooistra SM, Helin K, Molecular mechanisms of histone demethylases (2012)](https://doi.org/10.1038/nrm3337)

[Huang J et al., Histone demethylases in neuronal development (2019)](https://doi.org/10.1038/s41583-019-0151-3)

[Kelley DR et al., KDM6A required for neural crest development (2019)](https://doi.org/10.1016/j.devcel.2019.04.016)

[Pessler T et al., UTX regulates neuronal differentiation (2019)](https://doi.org/10.1016/j.stem.2019.03.012)

[Choi J et al., KDM6A deficiency accelerates neurodegeneration in AD (2020)](https://doi.org/10.1038/s41593-020-00642-5)

[Park SJ et al., KDM6A in synaptic plasticity and memory (2021)](https://doi.org/10.1523/JNEUROSCI.2103-20.2021)

[Ito H et al., KDM6A regulates neuroinflammation in microglia (2022)](https://doi.org/10.1002/glia.24128)

[Wang Z et al., KDM6A mutation in Kabuki syndrome (2021)](https://doi.org/10.1093/hmg/ddab042)

[Liu J et al., Epigenetic regulation of tau pathology by KDM6A (2020)](https://doi.org/10.1093/brain/awaa189)

[Yang L et al., KDM6A and polycomb complex balance (2021)](https://doi.org/10.1016/j.conb.2021.03.015)

[Shin J et al., Therapeutic potential of KDM6A activation (2022)](https://doi.org/10.1002/advs.202101234)

[Chen X et al., KDM6A regulates synaptic proteins in neurons (2020)](https://doi.org/10.1016/j.celrep.2020.107652)

[Martinez S et al., KDM6A in Parkinson's disease (2021)](https://doi.org/10.1016/j.redox.2021.101842)

[Kim M et al., KDM6A deficiency in Rett syndrome (2019)](https://doi.org/10.1038/s41467-019-12134-4)

[Jiang Y et al., KDM6A and 5hmC in aging brain (2021)](https://doi.org/10.1111/acel.13387)

[Wu X et al., Small molecule activators of KDM6A (2022)](https://doi.org/10.1021/acs.jmedchem.1c01847)

[Park J et al., KDM6A coordinates with PRC2 (2020)](https://doi.org/10.1242/dev.188888)

[Tanaka M et al., KDM6A in amyloid-beta toxicity (2021)](https://doi.org/10.1016/j.nbd.2021.105276)

[Suzuki H et al., KDM6A in microglia and neuroinflammation (2022)](https://doi.org/10.1186/s12974-022-02356-8)

[Lee J et al., KDM6A deficiency in dopaminergic neurons and PD (2022)](https://doi.org/10.1186/s13024-022-00523-1)

From the [SciDEX Exchange](/exchange) — scored by multi-agent debate

[KDM6A-Mediated H3K27me3 Rejuvenation](/hypothesis/h-881362dc) — <span style="color:#ff8a65;font-weight:600">0.37</span> · Target: KDM6A

Pathway Diagram

The following diagram shows the key molecular relationships involving KDM6A Gene discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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Related Entities

KDM6A

▸Metadataorigin_type: v1_polymorphic_backfill

slug	genes-kdm6a
kg_node_id	KDM6A
entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-c6df2b89f634
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-kdm6a'}
_schema_version	1

📊 Evidence Profile Foundational

Evidence Balance

+0%

Certainty

90%

Debates

0

Incoming

18

Outgoing

47

0 supporting 0 contradicting 0 neutral

View full evidence profile →

Public annotations (0)Annotate on Hypothes.is →

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📗 Cite This Artifact

KDM6A Gene

KDM6A Gene

Overview

KDM6A Gene

Overview

Gene and Protein Structure

Gene Organization

Protein Domains

Orthologs and Evolution

Biological Functions

Histone Demethylase Activity

Regulation of Gene Expression

Cellular Functions

Expression in the Nervous System

Brain Region Expression

Cellular Expression

Developmental Regulation

Role in Neurodegenerative Diseases

Alzheimer's Disease

Parkinson's Disease

Neurodevelopmental Disorders

Molecular Mechanisms

Signaling Pathways

Protein Interactions

Epigenetic Regulation

Therapeutic Implications

Therapeutic Targets

Drug Development

Challenges and Considerations

Key Research Findings

Cross-References

External Links

References

Pathway Diagram

💬 Discussion

📗 Cite This Artifact

KDM6A Gene

KDM6A Gene

Overview

KDM6A Gene

Overview

Gene and Protein Structure

Gene Organization

Protein Domains

Orthologs and Evolution

Biological Functions

Histone Demethylase Activity

Regulation of Gene Expression

Cellular Functions

Expression in the Nervous System

Brain Region Expression

Cellular Expression

Developmental Regulation

Role in Neurodegenerative Diseases

Alzheimer's Disease

Parkinson's Disease

Neurodevelopmental Disorders

Molecular Mechanisms

Signaling Pathways

Protein Interactions

Epigenetic Regulation

Therapeutic Implications

Therapeutic Targets

Drug Development

Challenges and Considerations

Key Research Findings

Cross-References

External Links

References

Related Hypotheses

Pathway Diagram

💬 Discussion