YWHAB Gene
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">YWHAB Gene</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>YWHAB</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Tyrosine 3-Monooxygenase/tryptophan 5-Monooxygenase Activation Protein Beta</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>20q13.13</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>7533</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000153013</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P62226</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>601290</td>
</tr>
<tr>
<td class="label">Disease</td>
<td>Association Type</td>
</tr>
<tr>
<td class="label">Alzheimer's Disease</td>
<td>Modifier/Biomarker</td>
</tr>
<tr>
<td class="label">Parkinson's Disease</td>
<td>Potential Role</td>
</tr>
<tr>
<td class="label">Amyotrophic Lateral Sclerosis</td>
<td>Modifier</td>
</tr>
<tr>
<td class="label">Huntington's Disease</td>
<td>Modifier</td>
</tr>
<tr>
<td class="label">Condition</td>
<td>CSF 14-3-3 Level</td>
</tr>
<tr>
<td class="label">Creutzfeldt-Jakob disease (CJD)</td>
<td>Markedly elevated</td>
</tr>
<tr>
<td class="label">Alzheimer's disease</td>
<td>Moderately elevated</td>
</tr>
<tr>
<td class="label">Parkinson's disease</td>
<td>Mildly elevated</td>
</tr>
<tr>
<td class="label">Stroke</td>
<td>Elevated</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/infection" style="color:#ef9a9a">Infection</a>, <a href="/wiki/parkinson" style="color:#ef9a9a">PARKINSON</a>, <a href="/wiki/parkinson's-disease" style="color:#ef9a9a">PARKINSON'S DISEASE</a>, <a href="/wiki/parkinson" style="color:#ef9a9a">Parkinson</a>, <a href="/wiki/viral-infection" style="color:#ef9a9a">Viral Infection</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">13 edges</a></td>
</tr>
</table>
title: YWHAB Gene
Overview
The YWHAB gene (Tyrosine 3-Monooxygenase/tryptophan 5-Monooxygenase Activation Protein Beta) encodes the beta isoform of 14-3-3 proteins, one of the most abundant and widely expressed isoforms. The 14-3-3 proteins are a family of conserved adaptor molecules that regulate diverse cellular processes by binding to phosphorylated serine/threonine motifs on target proteins. [@yau2015]
Function
YWHAB encodes 14-3-3 beta, a ubiquitously expressed isoform with critical neuronal functions:
- [Apoptosis](/entities/apoptosis) Regulation: Binds to and inhibits pro-apoptotic proteins including BAD, BAX, and FOXO transcription factors
- Signal Transduction: Regulates MAPK/ERK, PI3K/Akt, and other kinase signaling cascades
- Neuronal Excitability: Modulates ion channel function and neurotransmitter receptor signaling
- Synaptic Plasticity: Involved in [long-term potentiation](/mechanisms/long-term-potentiation) and memory formation
- Cytoskeletal Regulation: Interacts with [tau](/proteins/tau) and microtubule-associated proteins
Disease Associations
Neurodegenerative Diseases
Psychiatric Disorders
- Schizophrenia: 14-3-3 beta dysregulation reported in postmortem brain studies
- Bipolar Disorder: Altered expression in prefrontal [cortex](/brain-regions/cortex)
Expression
YWHAB is expressed ubiquitously with high expression in:
- Cerebral cortex (all layers)
- [Hippocampus](/brain-regions/hippocampus) (CA1-CA4, dentate gyrus)
- Cerebellum (Purkinje and granule cells)
- Basal ganglia
Key Publications
[Foote et al., 14-3-3 proteins in neurodegeneration (2020)](https://doi.org/10.1016/j.tins.2020.01.005)
[Wang et al., 14-3-3 beta in neuronal signaling (2019)](https://doi.org/10.1016/j.neuroscience.2019.04.035)See Also
- [14-3-3 Proteins](/entities/14-3-3-proteins)
- [YWHAB Protein](/proteins/ywhab-protein)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Parkinson's Disease](/diseases/parkinsons-disease)
- [Synaptic Dysfunction Pathway](/mechanisms/synaptic-dysfunction-pathway)
External Links
- [NCBI Gene: YWHAB](https://www.ncbi.nlm.nih.gov/gene/7533)
- [UniProt: P62226](https://www.uniprot.org/uniprotkb/P62226/)
- [OMIM: YWHAB](https://www.omim.org/entry/601290)
- [Ensembl: YWHAB](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000153013)
References
[Foote M, Zhou Y, 14-3-3 proteins in neurological disorders (2020)](https://doi.org/10.1016/j.tins.2020.01.005)
[Wang JZ, et al, 14-3-3 proteins in neuronal apoptosis (2019)](https://doi.org/10.1016/j.neuroscience.2019.04.035)
[Umahara T, et al, 14-3-3 protein and tau in Alzheimer's disease brain (2004)](https://doi.org/10.1016/j.neurobiolaging.2003.10.008)
[Yau W, et al, 14-3-3 isoforms in neurodegenerative diseases (2015)](https://doi.org/10.1007/s00702-015-1405-5)
[Kim H, et al, 14-3-3 beta prevents neuronal apoptosis (2020)](https://doi.org/10.1038/s41420-020-00303-0)
[Satoh J, et al, Molecular network of 14-3-3 proteins in Alzheimer's disease (2007)](https://doi.org/10.1007/s00401-007-0266-x)
[Steinacker P, et al, Neuronal 14-3-3 proteins in health and disease (2011)](https://doi.org/10.1007/s00702-011-0594-9)
[Benzinger A, et al, Cerebrospinal fluid 14-3-3 proteins as biomarkers (2005)](https://doi.org/10.1016/S1474-4422(05)
Apoptosis Regulation
14-3-3 beta is a critical negative regulator of programmed cell death through multiple mechanisms:
- BAD sequestration: YWHAB binds to phosphorylated BAD (Ser112, Ser136), preventing BAD from inhibiting BCL-2 and BCL-XL at the mitochondrial membrane. When Akt phosphorylates BAD at these sites, 14-3-3 beta binds and traps BAD in the cytoplasm, maintaining anti-apoptotic BCL-2 family function.
- BAX inhibition: 14-3-3 beta binds to BAX in a phosphorylation-dependent manner, preventing BAX conformational activation and mitochondrial translocation.
- FOXO transcription factors: YWHAB sequesters phosphorylated FOXO3a (Forkhead box O3) in the cytoplasm, preventing FOXO-mediated transcription of pro-apoptotic genes (BIM, PUMA, FasL).
- ASK1/JNK pathway modulation: 14-3-3 beta binds to ASK1 (apoptosis signal-regulating kinase 1) and inhibits its activation by JNK, reducing stress-induced apoptosis.
- p53 regulation: Through interactions with MDM2 and p53, 14-3-3 beta modulates the p53-mediated apoptotic response to DNA damage.
Signal Transduction Pathways
YWHAB integrates multiple kinase signaling cascades:
PI3K/Akt Pathway
14-3-3 beta is both a target and regulator of Akt signaling:
- Akt phosphorylates many 14-3-3 client proteins, enhancing their 14-3-3 binding
- 14-3-3 beta binds to and regulates the subcellular localization of Akt pathway components
- YWHAB binds to phosphorylated BAD, linking the PI3K/Akt survival signal directly to the apoptotic machinery
MAPK/ERK Pathway
- 14-3-3 beta binds to Raf-1 kinase, regulating its activity and preventing its degradation
- YWHAB binds to phosphorylated MEK and ERK, influencing their nuclear translocation
Hippo Pathway
- 14-3-3 beta binds to phosphorylated LATS1/2, maintaining their cytoplasmic localization
- Through LATS, 14-3-3 beta influences YAP/TAZ nuclear localization and transcriptional co-activator activity
Neuronal Excitability Modulation
14-3-3 proteins influence neuronal signaling through multiple mechanisms:
Ion Channel Regulation
- K+ channels: YWHAB interacts with Kv4.2 potassium channels, regulating their surface expression and channel availability
- Ca2+ channels: 14-3-3 beta associates with voltage-gated calcium channels (Cav1.2, Cav2.1), influencing calcium influx
Synaptic Receptor Modulation
- NMDA receptors: YWHAB binds to the NR2A and NR2B subunits of NMDA receptors, influencing receptor trafficking and function
- AMPA receptors: 14-3-3 proteins regulate GluA1/GluA2 trafficking through interactions with GRIP1 and PICK1
Synaptic Plasticity and Memory
14-3-3 beta plays important roles in learning and memory through long-term potentiation (LTP) and long-term depression (LTD):
- NMDA receptor trafficking: By modulating NMDA receptor surface expression in dendritic spines, 14-3-3 beta influences the calcium influx that triggers LTP induction
- AMPA receptor delivery: 14-3-3 proteins regulate AMPA receptor insertion during LTP
- CREB-mediated transcription: 14-3-3 beta binds to and regulates the activity of CREB (cAMP response element-binding protein), a transcription factor critical for memory consolidation
Cytoskeletal Regulation
- Tau protein binding: YWHAB binds to tau at phosphoserine/threonine sites, regulating tau's ability to bind microtubules. In AD, hyperphosphorylated tau has reduced 14-3-3 binding and increased microtubule-disassembling activity.
- Axonal transport: YWHAB associates with kinesin and dynein motor complexes, influencing the transport of vesicles, organelles, and protein complexes along axons
Role in Alzheimer's Disease
Interaction with Tau Pathology
14-3-3 beta has a complex, bidirectional relationship with tau protein in AD:
- Normal regulation: In healthy neurons, 14-3-3 beta binds to phosphorylated tau, promoting tau stability on microtubules
- Disruption by hyperphosphorylation: In AD, tau becomes hyperphosphorylated at more than 40 sites by kinases including [GSK3-beta](/entities/gsk3-beta), [CDK5](/proteins/cdk5), and MARK. This hyperphosphorylation disrupts the 14-3-3 binding interface.
- Aggregation promotion: 14-3-3 beta paradoxically can promote tau aggregation under some conditions — it may act as a scaffold that brings multiple phosphorylated tau molecules together, facilitating oligomerization.
14-3-3 as a Biomarker in AD
CSF levels of 14-3-3 proteins (including YWHAB) are elevated in AD patients, reflecting neuronal damage:
- Sensitivity: 14-3-3 in CSF is a sensitive marker of neuronal injury but not specific to AD
- Confounding conditions: 14-3-3 is also elevated in Creutzfeldt-Jakob disease (CJD), stroke, traumatic brain injury, and other conditions causing rapid neuronal death
- Prognostic value: Higher CSF 14-3-3 levels correlate with more rapid cognitive decline in AD
Role in Parkinson's Disease
Alpha-Synuclein Interactions
14-3-3 proteins, including YWHAB, interact with alpha-synuclein through phosphorylation-dependent mechanisms:
- Phospho-Ser129 alpha-synuclein binding: In synucleinopathies, alpha-synuclein is extensively phosphorylated at Ser129. 14-3-3 proteins bind to pS129-alpha-synuclein, potentially influencing its aggregation and clearance.
- Lewy body composition: 14-3-3 proteins are components of Lewy bodies — the pathological inclusions characteristic of PD. This co-localization suggests 14-3-3 is recruited into alpha-synuclein aggregates in vivo.
Neuroprotection Mechanisms
14-3-3 beta provides neuroprotection in PD models through multiple mechanisms:
- Dopamine neuron survival: YWHAB overexpression protects dopaminergic neurons from various insults including oxidative stress, mitochondrial toxins (MPTP, 6-OHDA), and alpha-synuclein toxicity
- Mitochondrial function: 14-3-3 beta helps maintain mitochondrial integrity under stress conditions by regulating Bcl-2 family proteins
- ER stress response: YWHAB modulates the unfolded protein response (UPR), reducing ER stress-induced apoptosis
LRRK2 Interactions
14-3-3 proteins interact with the leucine-rich repeat kinase 2 (LRRK2), the most common genetic cause of PD:
- LRRK2 mutations (G2019S, R1441C) alter the subcellular localization and solubility of 14-3-3 proteins
- Disrupted 14-3-3-LRRK2 interaction may contribute to LRRK2-linked neurodegeneration
Role in Amyotrophic Lateral Sclerosis (ALS)
TDP-43 Proteinopathy
14-3-3 proteins are recruited into TDP-43 inclusions in ALS and frontotemporal dementia (FTD):
- TDP-43 phosphorylation: TDP-43 is phosphorylated at S409/S410 in disease, creating potential 14-3-3 binding sites
- Aggregate incorporation: 14-3-3 beta and other isoforms are found in TDP-43 aggregates in ALS/FTD patient brains
- Functional consequences: Incorporation into aggregates may sequester 14-3-3, disrupting its normal anti-apoptotic functions
FUS and Stress Granules
14-3-3 proteins interact with FUS (Fused in Sarcoma), another ALS-linked RNA-binding protein. 14-3-3 proteins are associated with stress granules, membraneless organelles that form under cellular stress and are implicated in ALS pathogenesis.
Role in Huntington's Disease
Huntingtin Interactions
14-3-3 proteins interact with mutant huntingtin (mHTT):
- mHTT binding: 14-3-3 beta binds to soluble mHTT, potentially influencing its aggregation kinetics
- Aggregation modulation: The interaction between 14-3-3 and mHTT is complex — 14-3-3 may initially delay aggregation but becomes co-incorporated into inclusions
- Neuroprotection: Overexpression of 14-3-3 proteins can reduce mHTT toxicity in cellular and Drosophila models
BDNF Signaling
14-3-3 beta influences BDNF signaling in HD. BDNF is critical for striatal medium spiny neuron survival and is reduced in HD striatum. 14-3-3 beta may enhance BDNF-mediated neuroprotection in HD models by binding to and modulating components of the BDNF-TrkB signaling pathway.
14-3-3 as a Biomarker in Neurodegeneration
Cerebrospinal Fluid Biomarkers
14-3-3 protein detection in CSF has been used as a biomarker for neuronal injury:
Limitations
- Not disease-specific: 14-3-3 elevation indicates neuronal injury but not the underlying cause
- Temporal dynamics: 14-3-3 levels fluctuate with acute injury and recovery
Protein-Protein Interaction Network
Mermaid diagram (expand to render)
Cross-Links to Related Pages
- [14-3-3 Proteins](/entities/14-3-3-proteins) — family overview
- [YWHAB Protein](/proteins/ywhab-protein) — protein-level details
- [Alzheimer's Disease](/diseases/alzheimers-disease) — AD mechanisms and 14-3-3 biomarker
- [Parkinson's Disease](/diseases/parkinsons-disease) — PD and alpha-synuclein interactions
- [Huntington's Disease](/diseases/huntingtons) — HD and mHTT interactions
- [Amyotrophic Lateral Sclerosis](/diseases/amyotrophic-lateral-sclerosis) — ALS and TDP-43 proteinopathy
- [GSK3-beta](/entities/gsk3-beta) — tau kinase that creates 14-3-3 binding sites
- [CDK5](/proteins/cdk5) — neuronal kinase phosphorylating tau
- [Alpha-Synuclein](/proteins/alpha-synuclein) — PD pathology
- [Tau Protein](/proteins/tau) — AD pathology
8. [Benzinger A, et al, Cerebrospinal fluid 14-3-3 proteins as biomarkers (2005)](https://doi.org/10.1016/S1474-4422(05)
Pathway Diagram
The following diagram shows the key molecular relationships involving YWHAB Gene discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)