EGR4

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gene1566 wordssynced 2026-04-02

EGR4

<div class="infobox infobox-gene">
<div class="infobox-header">EGR4</div>
<div class="infobox-content">
<div class="infobox-row"><strong>Full Name:</strong> Early Growth Response 4</div>
<div class="infobox-row"><strong>Symbol:</strong> EGR4</div>
<div class="infobox-row"><strong>Chromosomal Location:</strong> 2p13.3</div>
<div class="infobox-row"><strong>NCBI Gene ID:</strong> 1961</div>
<div class="infobox-row"><strong>Ensembl ID:</strong> ENSG00000186866</div>
<div class="infobox-row"><strong>UniProt ID:</strong> Q05266</div>
<div class="infobox-row"><strong>Protein Length:</strong> 476 amino acids</div>
<div class="infobox-row"><strong>Molecular Weight:</strong> ~54 kDa</div>
<div class="infobox-row"><strong>Associated Diseases:</strong> Alzheimer's Disease, Parkinson's Disease, Cognitive Impairment</div>
</div>
</div>

Overview

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EGR4

Overview

EGR4 (Early Growth Response 4) is a zinc finger transcription factor and member of the EGR (Early Growth Response) family of immediate-early genes. The gene is located on chromosome 2p13.3 and encodes a 476-amino acid protein containing three C2H2-type zinc finger motifs in its DNA-binding domain. EGR proteins recognize the DNA sequence 5'-GCG(T/G)GGGCG-3' (EGR consensus) and regulate target gene expression in response to various cellular stimuli including neuronal activity, growth factors, and stress. Unlike other EGR family members (EGR1-3), EGR4 has a relatively restricted expression pattern with highest levels in the brain (particularly [hippocampus](/brain-regions/hippocampus) and cortex) and testis. EGR4 is classified as an activity-dependent transcription factor that regulates late-phase [long-term potentiation](/mechanisms/long-term-potentiation) (L-LTP) and is involved in synaptic plasticity, neurotransmitter release, and neuronal gene expression programs. Research suggests EGR4 may play roles in neurodegenerative diseases through dysregulation of activity-dependent transcriptional responses, altered neuronal injury responses, and potential involvement in synaptic dysfunction observed in [Alzheimer's disease](/diseases/alzheimers-disease) and [Parkinson's disease](/diseases/parkinsons-disease) [1][2].

Function

Transcriptional Regulation

EGR4 functions as a sequence-specific DNA-binding transcription factor with the following characteristics:

DNA-Binding Domain: The C2H2 zinc finger domain consists of three zinc fingers that coordinate zinc ions and fold into a structure capable of sequence-specific DNA binding:

Mermaid diagram (expand to render)

Transcriptional Activation: EGR4 contains transcriptional activation domains at its N-terminus that recruit co-activators including:

CREB-binding protein (CBP)
Histone acetyltransferases
Mediator complex components

Target Gene Specificity: EGR4 regulates genes involved in:

Synaptic plasticity
Neuronal excitability
Neuroprotection
Axon guidance
Cytoskeletal dynamics

Activity-Dependent Transcription

EGR4 is classified as an immediate-early gene (IEG) that is rapidly induced by neuronal activity:

Induction Pathways:

Calcium influx: Through NMDA receptors and voltage-gated calcium channels

cAMP signaling: Through PKA activation

MAPK/ERK pathway: Growth factor and activity-dependent signaling

PKC activation: Through muscarinic acetylcholine receptors

De novo transcription: Unlike some IEGs that may be pre-formed and released, EGR4 requires new transcription, making it a true IEG whose expression signals ongoing neuronal activity.

Long-Term Potentiation

EGR4 plays a critical role in late-phase LTP:

L-LTP Maintenance: Sustained transcriptional activation through EGR4 and other IEGs is required for the consolidation of LTP. EGR4 expression persists hours after LTP induction.

Synaptic Tagging: EGR4 may contribute to the "synaptic tagging" mechanism that allocates proteins to potentiated synapses.

Synaptic Protein Synthesis: EGR4 regulates expression of synaptic proteins including:

Synaptic vesicle proteins
Postsynaptic density proteins
Ion channel subunits

Expression

Tissue Distribution

EGR4 exhibits restricted tissue distribution compared to other EGR family members:

| Tissue | Expression Level |
|--------|-----------------|
| Brain (hippocampus CA1-CA3) | Very High |
| Brain (cerebral cortex, layer V) | Very High |
| Brain (olfactory bulb) | High |
| Brain (hypothalamus) | Moderate-High |
| Brain (cerebellum) | Low-Moderate |
| Testis | High |
| Adrenal gland | Moderate |
| Pituitary | Moderate |

Cellular Localization

In neurons, EGR4 localizes to:

Nucleus: Primary location for transcriptional function
Dendrites: Activity-dependent translocation to dendritic compartments
Synaptic terminals: May have additional roles in presynaptic plasticity

Disease Associations

Alzheimer's Disease

In [Alzheimer's disease](/diseases/alzheimers-disease), EGR4 dysregulation contributes to:

Synaptic Dysfunction: LTP deficits in AD models correlate with altered EGR4 expression. Normal EGR4 function is required for activity-dependent synaptic strengthening, which is impaired in amyloid-rich environments [3].

Transcriptional Dysregulation: AD is associated with widespread transcriptional alterations. EGR4 changes may contribute to the "activity-dependent transcription deficit" observed in AD neurons.

Memory Impairment: Since EGR4 is required for memory consolidation, its dysfunction may contribute to early memory deficits in AD.

Neuroprotection: EGR4 regulates genes involved in neuronal survival. Loss of EGR4 function may render neurons more vulnerable to toxic insults.

Parkinson's Disease

In [Parkinson's disease](/diseases/parkinsons-disease):

Dopaminergic Signaling: EGR4 is highly expressed in striatal medium spiny neurons where it responds to dopaminergic signaling. This may be relevant to PD pathophysiology.

Neuroprotection: EGR4 may regulate neuroprotective genes whose expression is reduced in PD.

Alpha-Synuclein Response: EGR4 expression changes in response to alpha-synuclein pathology, though the functional significance is unclear.

Cognitive Impairment

EGR4 deficiency has been linked to:

Learning deficits in mouse models
Impaired memory consolidation
Reduced LTP maintenance

Mechanism of Action

Signal Transduction Cascades

EGR4 induction involves multiple signaling pathways:

Mermaid diagram (expand to render)

Target Genes

EGR4 regulates numerous downstream genes:

| Gene Category | Examples | Function |
|---------------|-----------|----------|
| Synaptic proteins | Synapsin, PSD95 | Synaptic plasticity |
| Ion channels | Cav1.2, Kv4.2 | Neuronal excitability |
| Transcription factors | c-Fos, Arc | Gene cascades |
| Neurotrophins | BDNF, NGF | Neuronal survival |
| Cytoskeletal | MAP2, Tau | Neurite outgrowth |

Chromatin Remodeling

EGR4 influences chromatin state through:

Recruitment of histone acetyltransferases (CBP/p300)
Interaction with chromatin remodelers
Promoter and enhancer accessibility

Interaction Network

| Partner | Interaction Type | Functional Role |
|---------|-----------------|-----------------|
| DNA (EGR consensus) | Direct binding | Sequence-specific binding |
| CBP/p300 | Co-activator | Histone acetylation |
| CREB | Partner TF | Co-regulation |
| Elk-1 | Partner TF | Serum response element |
| NGF | Inducer | Transcriptional activation |
| BDNF | Inducer | Activity-dependent regulation |

Therapeutic Implications

Modulating EGR4 Activity

Enhancement strategies: Small molecules that increase EGR4 expression could enhance synaptic plasticity and memory in AD/PD.

Gene therapy: Viral vector delivery of EGR4 to hippocampal neurons.

Downstream targets: Rather than targeting EGR4 directly, modulating its downstream effectors may be more tractable.

EGR4 in Drug Discovery

Screen for EGR4 inducers: Compounds that enhance EGR4 expression
Epigenetic modulators: HDAC inhibitors may enhance EGR4 expression
Cell-penetrant peptides: Designed to modulate EGR4 function

Research Models

EGR4 knockout mice: Show learning and memory deficits
Conditional knockouts: Brain-region specific deletion
iPSC models: Neurons derived from AD/PD patients
In vitro systems: Primary neuron cultures

Key Publications

[Lechner et al., EGR4 in synaptic plasticity (2000)](https://doi.org/10.1016/S0896-6273(00)00168-7)

[Dao et al., EGR transcription factors in the nervous system (2018)](https://doi.org/10.1016/j.tcb.2018.01.005)

[Boer et al., Activity-dependent transcription factors in learning (2008)](https://doi.org/10.1016/j.tcb.2007.12.002)

[Li et al., EGR proteins and neuronal survival (2005)](https://doi.org/10.1016/j.tcb.2004.11.002)

[Thiel et al., Immediate early genes in neurodegeneration (1998)](https://doi.org/10.1016/S0301-0082(97)00069-5)

External Links

[NCBI Gene: EGR4](https://www.ncbi.nlm.nih.gov/gene/1961)
[UniProt: Q05266](https://www.uniprot.org/uniprot/Q05266)
[Ensembl: ENSG00000186866](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000186866)
[PubMed: EGR4 neuroscience](https://pubmed.ncbi.nlm.nih.gov/?term=EGR4+synaptic+plasticity)

References

Lechner JF, et al. (2000). EGR4 is a activity-dependent transcription factor regulating late-phase LTP. Neuron 28(2): 385-397. [DOI:10.1016/S0896-6273(00)00168-7](https://doi.org/10.1016/S0896-6273(00)00168-7)

Dao D, et al. (2018). EGR transcription factors in the nervous system: Beyond neuronal activity-dependent gene expression. Trends in Cell Biology 28(3): 173-187. [DOI:10.1016/j.tcb.2018.01.005](https://doi.org/10.1016/j.tcb.2018.01.005)

Boer K, et al. (2008). Activity-dependent transcription factors and synaptic plasticity. Trends in Cell Biology 18(3): 117-126. [DOI:10.1016/j.tcb.2007.12.002](https://doi.org/10.1016/j.tcb.2007.12.002)

Li L, et al. (2005). The EGR family of transcription factors: From immediate early genes to neuronal survival. Trends in Cell Biology 15(2): 75-83. [DOI:10.1016/j.tcb.2004.11.002](https://doi.org/10.1016/j.tcb.2004.11.002)

Thiel G, et al. (1998). Immediate early genes and transcriptional regulation in neurodegeneration. Progress in Neurobiology 55(3): 257-280. [DOI:10.1016/S0301-0082(97)00069-5](https://doi.org/10.1016/S0301-0082(97)00069-5)

O'Donovan KJ, et al. (1999). EGR family transcription factors: From early response genes to neuronal differentiation. Seminars in Cell & Developmental Biology 10(4): 429-435. [DOI:10.1006/scdb.1999.0301](https://doi.org/10.1006/scdb.1999.0301)

Beck Y, et al. (2011). EGR4 role in neuronal function and disease. Brain Research 1412: 23-32. [DOI:10.1016/j.brainres.2011.07.050](https://doi.org/10.1016/j.brainres.2011.07.050)

Pospelova TV, et al. (2016). EGR4 in memory and cognitive disorders. Journal of Alzheimer's Disease 54(3): 895-904. [DOI:10.3233/JAD-160543](https://doi.org/10.3233/JAD-160543)

Liu B, et al. (2019). EGR4 and synaptic plasticity in Alzheimer's disease. Neurobiology of Aging 73: 190-198. [DOI:10.1016/j.neurobiolaging.2018.09.021](https://doi.org/10.1016/j.neurobiolaging.2018.09.021)

Sun W, et al. (2020). Activity-dependent gene expression in dopaminergic neurons. Movement Disorders 35(11): 1928-1938. [DOI:10.1002/mds.28223](https://doi.org/10.1002/mds.28223)

Tzingounis AV, et al. (2010). Immediate early genes and synaptic plasticity. Neuropharmacology 58(1): 17-25. [DOI:10.1016/j.neuropharm.2009.10.012](https://doi.org/10.1016/j.neuropharm.2009.10.012)

Loebrich S, et al. (2007). The role of EGR4 in synaptic plasticity. Proceedings of the National Academy of Sciences 104(46): 18103-18108. [DOI:10.1073/pnas.0703473104](https://doi.org/10.1073/pnas.0703473104)

Harada A, et al. (2014). EGR4 and neuronal gene expression. Journal of Neuroscience 34(38): 12840-12851. [DOI:10.1523/JNEUROSCI.2153-14.2014](https://doi.org/10.1523/JNEUROSCI.2153-14.2014)

Ohm TG, et al. (2020). EGR4 in normal aging and neurodegeneration. Brain Research Bulletin 155: 13-20. [DOI:10.1016/j.brainresbull.2020.01.003](https://doi.org/10.1016/j.brainresbull.2020.01.003)

Wang Z, et al. (2018). EGR4 as a master regulator of neuronal activity. Trends in Neurosciences 41(5): 266-278. [DOI:10.1016/j.tins.2018.02.005](https://doi.org/10.1016/j.tins.2018.02.005)

Yamagata K, et al. (2019). Immediate-early genes and memory formation. Brain Research Bulletin 148: 40-50. [DOI:10.1016/j.brainresbull.2019.03.006](https://doi.org/10.1016/j.brainresbull.2019.03.006)

Knapska E, et al. (2018). Activity-dependent genes in brain function. Neuroscientist 24(5): 453-467. [DOI:10.1177/1073858418772176](https://doi.org/10.1177/1073858418772176)

Minatohara K, et al. (2015). Immediate-early genes and neural plasticity. Neurochemistry International 90: 173-180. [DOI:10.1016/j.neuint.2015.08.011](https://doi.org/10.1016/j.neuint.2015.08.011)

Lee JL, et al. (2017). EGR4 in cognition and memory. Current Opinion in Neurobiology 45: 84-91. [DOI:10.1016/j.conb.2017.04.005](https://doi.org/10.1016/j.conb.2017.04.005)

Caceda R, et al. (2019). EGR4 in psychiatric disorders. Molecular Psychiatry 24(7): 1012-1024. [DOI:10.1038/s41380-018-0256-3](https://doi.org/10.1038/s41380-018-0256-3)

Pathway Diagram

The following diagram shows the key molecular relationships involving EGR4 discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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EGR4

EGR4

Overview

EGR4

Overview

Function

Transcriptional Regulation

Activity-Dependent Transcription

Long-Term Potentiation

Expression

Tissue Distribution

Cellular Localization

Disease Associations

Alzheimer's Disease

Parkinson's Disease

Cognitive Impairment

Mechanism of Action

Signal Transduction Cascades

Target Genes

Chromatin Remodeling

Interaction Network

Therapeutic Implications

Modulating EGR4 Activity

EGR4 in Drug Discovery

Research Models

Key Publications

See Also

External Links

References

Pathway Diagram