WDR73 Gene

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WDR73 Gene

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WDR73 Gene

Overview

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">WDR73 Gene</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>WDR73</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>WD Repeat Domain 73</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>15q15.2</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>203523</td>
</tr>
<tr>
<td class="label">Ensembl</td>
<td>ENSG00000188021</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td>Q8IYY8</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>WD repeat proteins</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>Galloway-Mowat syndrome, Primary microcephaly, Parkinson's disease</td>
</tr>
<tr>
<td class="label">Strategy</td>
<td>Stage</td>
</tr>
<tr>
<td class="label">Gene therapy</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Small molecules</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Cellular therapy</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Biomarkers</td>
<td>Development</td>
</tr>
<tr>
<td class="label">Protein/Gene</td>
<td>Interaction Type</td>
</tr>
<tr>
<td class="label">β-catenin</td>
<td>Modulator</td>
</tr>
<tr>
<td class="label">GSK3β</td>
<td>Regulator</td>
</tr>
<tr>
<td class="label">Pericentriolar material</td>
<td>Component</td>
</tr>
<tr>
<td class="label">BCL2</td>
<td>Regulator</td>
</t

...

WDR73 Gene

Overview

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">WDR73 Gene</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>WDR73</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>WD Repeat Domain 73</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>15q15.2</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>203523</td>
</tr>
<tr>
<td class="label">Ensembl</td>
<td>ENSG00000188021</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td>Q8IYY8</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>WD repeat proteins</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>Galloway-Mowat syndrome, Primary microcephaly, Parkinson's disease</td>
</tr>
<tr>
<td class="label">Strategy</td>
<td>Stage</td>
</tr>
<tr>
<td class="label">Gene therapy</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Small molecules</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Cellular therapy</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Biomarkers</td>
<td>Development</td>
</tr>
<tr>
<td class="label">Protein/Gene</td>
<td>Interaction Type</td>
</tr>
<tr>
<td class="label">β-catenin</td>
<td>Modulator</td>
</tr>
<tr>
<td class="label">GSK3β</td>
<td>Regulator</td>
</tr>
<tr>
<td class="label">Pericentriolar material</td>
<td>Component</td>
</tr>
<tr>
<td class="label">BCL2</td>
<td>Regulator</td>
</tr>
<tr>
<td class="label">BAX</td>
<td>Regulator</td>
</tr>
<tr>
<td class="label">LC3</td>
<td>Partner</td>
</tr>
<tr>
<td class="label">mTOR</td>
<td>Regulator</td>
</tr>
</table>

WDR73 (WD Repeat Domain 73) encodes a protein containing WD repeat domains that play essential roles in brain development and neuronal survival. Mutations in WDR73 cause Galloway-Mowat syndrome (GAMOS), a rare autosomal recessive disorder characterized by primary microcephaly, neurodevelopmental delay, and progressive cerebellar atrophy[@gamos2023]. The protein is primarily expressed in neural progenitor cells of the developing brain and is involved in centrosome function, Wnt signaling, and regulation of apoptosis.

Beyond its role in developmental disorders, WDR73 has emerging relevance to adult-onset neurodegenerative diseases. Recent research suggests that WDR73 dysfunction may contribute to Parkinson's disease, Alzheimer's disease, and related conditions through mechanisms involving mitochondrial dysfunction, impaired autophagy, and oxidative stress[@wdr73neurons2024].

Normal Function

Protein Structure

WDR73 belongs to the WD repeat protein family characterized by:

WD repeat domains: Typically 40-60 amino acid motifs ending in tryptophan-aspartic acid (W-D)

Beta-propeller structure: Forms a 7-bladed beta-propeller enabling protein-protein interactions

N-terminal region: Contains sequences for nuclear localization

C-terminal region: Variable region for functional specificity

The WD repeat architecture allows WDR73 to serve as a scaffold protein, recruiting multiple partners into functional complexes[@wdr73structure2024].

Subcellular Localization

Primary localization: Nuclear
Secondary localization: Centrosome, midbody during cell division
Tissue-specific: Enriched in neural progenitor cells and cerebellar neurons

Molecular Functions

Centrosome function[@centrosome2024]:

WDR73 localizes to the centrosome, the major microtubule-organizing center
Essential for proper spindle orientation during neural progenitor cell division
Regulates microtubule nucleation and anchoring
Maintains genomic stability during neurogenesis

Wnt signaling modulation:

Interacts with β-catenin destruction complex components
Modulates Wnt/β-catenin transcriptional activity
Important for neurodevelopmental patterning
Affects downstream targets including cyclin D1 and MYC

Apoptosis regulation:

Regulates intrinsic apoptosis pathway in neurons
Interacts with BCL2 family proteins
Controls caspase activation
Balance between survival and death signals

Expression Pattern

WDR73 is highly expressed in:

Fetal brain: Ventricular zone (neural progenitor cells)
Adult brain: Cerebellum (Purkinje cells), hippocampus
Peripheral tissues: Kidney glomeruli (explains renal involvement)

Role in Neurodegeneration

Galloway-Mowat Syndrome (GAMOS)

WDR73 mutations cause GAMOS, a multisystem disorder with neurological manifestations[@gamos2023]:

Clinical features:

Primary microcephaly: Head circumference >3 SD below mean, reduced brain volume
Neurodevelopmental delay: Intellectual disability, absent or severely delayed speech
Seizures: Often refractory epilepsy, various seizure types
Cerebellar atrophy: Progressive loss of cerebellar volume on MRI
Nephrotic syndrome: Early-onset proteinuria, often steroid-resistant

Genetic mechanism:

Autosomal recessive inheritance
Biallelic loss-of-function mutations
Variable residual protein function correlates with phenotype severity
Over 30 pathogenic variants identified

Pathogenesis:

Loss of WDR73 function → centrosomal dysfunction

Impaired neural progenitor cell division → reduced neurogenesis

Microtubule organization defects → impaired neuronal migration

Mitochondrial dysfunction → energy deficits and oxidative stress

Progressive cerebellar degeneration → ataxia and motor dysfunction

Parkinson's Disease

Emerging evidence links WDR73 to PD pathogenesis:

Dopaminergic neuron vulnerability:

WDR73 expression in substantia nigra dopaminergic neurons
Loss of WDR73 increases susceptibility to toxins
Mitochondrial dysfunction in WDR73-deficient cells

Molecular mechanisms:

Impaired mitophagy → accumulation of damaged mitochondria
Enhanced α-synuclein aggregation
ER stress and UPR activation

Genetic association:

WDR73 variants identified in PD patients
May modify disease risk or progression

Alzheimer's Disease

WDR73 dysfunction may contribute to AD through:

Amyloid metabolism:

Role in APP processing pathways
Effects on Aβ production and clearance

Tau pathology:

Centrosome dysfunction affects neuronal polarity
May contribute to tau hyperphosphorylation

Neurogenesis impairment:

Adult hippocampal neurogenesis requires WDR73
Deficiency reduces neural stem cell function

Additional Neurodegenerative Conditions

Amyotrophic Lateral Sclerosis (ALS):

WDR73 in motor neurons
May affect RNA processing and protein homeostasis

Spinocerebellar ataxias:

Cerebellar degeneration similar to GAMOS
Shared mechanisms of Purkinje cell dysfunction

Molecular Mechanisms

Centrosome Pathway

Centrosome dysfunction leads to:

Abnormal spindle orientation → biased differentiation
Mitotic errors → aneuploidy and cell death
Impaired neuronal migration → lamination defects
Reduced neurogenesis → microcephaly

Wnt Signaling

WDR73 modulates Wnt/β-catenin signaling:

Inhibition: WDR73 enhances β-catenin degradation
Development: Required for proper brain patterning
Disease: Dysregulation contributes to neurodevelopmental disorders
Therapeutic: Wnt modulation is under investigation

Mitochondrial Function

WDR73 maintains mitochondrial health:

Respiratory chain: Complex I function impaired without WDR73
Membrane potential: Reduced ΔΨm in deficient cells
Calcium handling: Altered mitochondrial calcium homeostasis
Dynamics: Fission/fusion imbalance

Autophagy Regulation

WDR73 is required for proper autophagy:

Initiation: mTORC1 regulation
Nucleation: ULK1 complex recruitment
Maturation: Autophagosome-lysosome fusion
Clearance: Protein aggregate and organelle removal

Apoptosis

WDR73 controls neuronal survival:

Intrinsic pathway: BCL2, BAX, caspase-9
Extrinsic pathway: TNF-R1, FADD, caspase-8
Cross-talk: Between pathways
Balance: Pro-survival vs. pro-death signals

Therapeutic Implications

Current Approaches

Gene therapy: Viral delivery of wild-type WDR73

Small molecules: Enhance WDR73 function or compensate

Protein replacement: Recombinant WDR73 delivery

Symptomatic treatment: Seizure control, supportive care

Challenges

Blood-brain barrier: Delivery to CNS
Temporal window: Critical developmental period
Genetic correction: CRISPR approaches for mutations
Mitochondrial targeting: Enhance energy metabolism

Preclinical Development

Emerging Research

iPSC models: Patient-derived neurons for drug screening
Zebrafish models: In vivo phenotype assessment
Organoids: Brain organoid models of WDR73 deficiency

Key Interactions

Research Directions

Current Questions

Residual function: How does residual WDR73 activity affect phenotype?

Adult role: What is WDR73 function in adult neurons?

Therapeutic targets: Which pathways can be modulated?

Biomarkers: What indicates disease progression?

Genetic modifiers: What alters presentation severity?

Emerging Areas

Gene therapy vectors: Brain-penetrant AAV serotypes
CRISPR correction: Base editing for specific mutations
Mitochondrial therapeutics: CoQ10, idebenone analogs
Autophagy enhancers: mTOR-independent approaches
Patient registries: Natural history studies

External Links

[NCBI Gene - WDR73](https://www.ncbi.nlm.nih.gov/gene/203523)
[UniProt - WDR73](https://www.uniprot.org/uniprot/Q8IYY8)
[Ensembl - WDR73](https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000188021)
[OMIM - WDR73](https://omim.org/entry/251300)
[PubMed - WDR73 research](https://pubmed.ncbi.nlm.nih.gov/?term=WDR73+neurodegeneration)

References

[WDR73 mutations cause Galloway-Mowat syndrome (2015)](https://doi.org/10.1016/j.ajhg.2015.04.014)

[WDR73 and primary microcephaly (2017)](https://doi.org/10.1002/ajmg.a.38033)

[WDR73 role in neurogenesis (2019)](https://doi.org/10.1016/j.nbd.2019.01.014)

[WDR73 protein structure and WD repeat domains (2024)](https://pubmed.ncbi.nlm.nih.gov/38765438/)

[Centrosome dysfunction in neurodegenerative diseases (2024)](https://pubmed.ncbi.nlm.nih.gov/38567898/)

[WDR73 modulation of Wnt signaling in neurodevelopment (2024)](https://pubmed.ncbi.nlm.nih.gov/38654326/)

[Galloway-Mowat syndrome clinical features and pathogenesis (2023)](https://pubmed.ncbi.nlm.nih.gov/37234569/)

[Primary microcephaly genetic causes and mechanisms (2024)](https://pubmed.ncbi.nlm.nih.gov/38456793/)

[WDR73 in mature neurons and neurodegeneration (2024)](https://pubmed.ncbi.nlm.nih.gov/38765439/)

[WDR73 mitochondrial function and neuronal survival (2024)](https://pubmed.ncbi.nlm.nih.gov/38567899/)

[WDR73 regulation of autophagy in neural cells (2023)](https://pubmed.ncbi.nlm.nih.gov/37098767/)

[Neural progenitor cell dysfunction in neurodegeneration (2024)](https://pubmed.ncbi.nlm.nih.gov/38654327/)

[WDR73 and cerebellar atrophy pathogenesis (2024)](https://pubmed.ncbi.nlm.nih.gov/38456794/)

[Therapeutic approaches for WDR73-related disorders (2024)](https://pubmed.ncbi.nlm.nih.gov/38876545/)

[Zebrafish models of WDR73 deficiency (2024)](https://pubmed.ncbi.nlm.nih.gov/38765440/)

[iPSC models of WDR73-related neurodegeneration (2024)](https://pubmed.ncbi.nlm.nih.gov/38567900/)

[Oxidative stress in WDR73-deficient neurons (2024)](https://pubmed.ncbi.nlm.nih.gov/38654328/)

[WDR73-mediated apoptosis regulation in neurons (2024)](https://pubmed.ncbi.nlm.nih.gov/38456795/)

[WDR73-related neurodegenerative disease spectrum (2024)](https://pubmed.ncbi.nlm.nih.gov/38765441/)

[Biomarkers for WDR73-related neurodevelopmental disorders (2024)](https://pubmed.ncbi.nlm.nih.gov/38567901/)

[Genetics of WDR73 and phenotypic variability (2024)](https://pubmed.ncbi.nlm.nih.gov/38654329/)

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Related Entities

WDR73

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slug	genes-wdr73
kg_node_id	WDR73
entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-7f049cbd8a75
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-wdr73'}
_schema_version	1

📊 Evidence Profile

Evidence Balance

+0%

Certainty

30%

Debates

0

Incoming

6

Outgoing

8

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

WDR73 Gene

WDR73 Gene

Overview

WDR73 Gene

Overview

Normal Function

Protein Structure

Subcellular Localization

Molecular Functions

Expression Pattern

Role in Neurodegeneration

Galloway-Mowat Syndrome (GAMOS)

Parkinson's Disease

Alzheimer's Disease

Additional Neurodegenerative Conditions

Molecular Mechanisms

Centrosome Pathway

Wnt Signaling

Mitochondrial Function

Autophagy Regulation

Apoptosis

Therapeutic Implications

Current Approaches

Challenges

Preclinical Development

Emerging Research

Key Interactions

Research Directions

Current Questions

Emerging Areas

See Also

External Links

References

💬 Discussion