ELP3 Gene

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ELP3 Gene

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ELP3 — Elongator Subunit 3

Overview

ELP3 (Elongator Subunit 3) encodes a key component of the Elongator complex, a multiprotein ensemble originally characterized for its role in transcriptional elongation but now recognized for broader functions in tRNA modification, translational regulation, and neuronal development["@selinger2011"]. The Elongator complex consists of six subunits (ELP1-ELP6) and possesses acetyltransferase activity that catalyzes the modification of wobble uridine (U34) in tRNA molecules, a modification critical for codon-anticodon interaction accuracy and efficient translation["@bauer2012"].

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ELP3 — Elongator Subunit 3

Overview

Mermaid diagram (expand to render)

ELP3 (Elongator Subunit 3) encodes a key component of the Elongator complex, a multiprotein ensemble originally characterized for its role in transcriptional elongation but now recognized for broader functions in tRNA modification, translational regulation, and neuronal development["@selinger2011"]. The Elongator complex consists of six subunits (ELP1-ELP6) and possesses acetyltransferase activity that catalyzes the modification of wobble uridine (U34) in tRNA molecules, a modification critical for codon-anticodon interaction accuracy and efficient translation["@bauer2012"].

In the nervous system, ELP3 plays essential roles in neuronal migration, axon guidance, synapse formation, and myelination. The protein is highly expressed in the brain during development and in adulthood, with particular enrichment in regions associated with higher cognitive functions. Dysregulation of ELP3 has been implicated in multiple neurodegenerative diseases, neurodevelopmental disorders, and conditions involving oxidative stress["@mueller2018"].

| Property | Value |
|----------|-------|
| Gene Symbol | ELP3 |
| Full Name | Elongator Acetyltransferase Complex Subunit 3 |
| Chromosomal Location | 9q31.3 |
| NCBI Gene ID | 55187 |
| OMIM ID | 611023 |
| Ensembl ID | ENSG00000120656 |
| UniProt ID | Q9BYB4 |
| Encoded Protein | Elongator complex subunit 3 |
| Gene Type | Protein-coding |
| Protein Family | Elongator family, GNAT superfamily |
| Associated Diseases | Neurodegeneration, Hereditary Sensory Neuropathy, Intellectual Disability |

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Structure and Function

Protein Architecture

ELP3 is the catalytic subunit of the Elongator complex, containing several functional domains:

N-terminal domain: Protein-protein interaction motifs

Central acetyltransferase domain: Catalytic core with HAT activity

C-terminal domain: tRNA recognition and binding

The acetyltransferase domain belongs to the GNAT (Gcn5-related N-acetyltransferase) superfamily and catalyzes the transfer of acetyl groups from acetyl-CoA to specific substrate molecules.

The Elongator Complex

The Elongator complex comprises six subunits:

| Subunit | Function | Role |
|---------|----------|------|
| ELP1 | Scaffold | Structural foundation |
| ELP2 | Regulatory | Phosphorylation target |
| ELP3 | Catalytic | Acetyltransferase activity |
| ELP4 | Targeting | Cell-type specificity |
| ELP5 | Stabilization | Complex integrity |
| ELP6 | Regulation | Assembly control |

Enzymatic Activity

ELP3 exhibits multiple enzymatic functions[@bauer2013]:

tRNA acetylation: Modifies wobble position uridine (cmnm5U34) in tRNA
Histone acetylation: Contributes to transcriptional regulation
Non-histone protein acetylation: Regulation of various substrates
Autophagy regulation: Modification of autophagy-related proteins

Role in Neurodevelopment

Neuronal Migration

ELP3 is critical for proper neuronal migration during cortical development[@lott2014][@creppe2014]:

Mechanisms:

Regulation of translation at the leading edge of migrating neurons
Control of cytoskeletal protein expression
Modulation of cell adhesion molecules

Evidence from models:

ELP3 knockdown leads to impaired neuronal migration
Altered cortical layering in ELP3-deficient mice
Reduced radial migration velocity

Axon Guidance and Growth

In axon guidance, ELP3 functions through[@rahlkes2013][@glatt2012]:

Translational regulation: Local protein synthesis in growth cones
Vesicle trafficking: Interaction with VAMP7 in vesicle transport
Cytoskeletal dynamics: Regulation of actin and microtubule dynamics

Synapse Formation and Function

ELP3 contributes to synaptic development through multiple mechanisms[@windfuhr2016][@jakovcevski2017]:

Synaptic vesicle cycling: Regulates neurotransmitter release
Postsynaptic density organization: Affects receptor localization
Synaptic plasticity: Involved in LTP and LTD processes
Ribbon synapse formation: Essential for sensory neuron synapses

Myelination

In the peripheral and central nervous system, ELP3 supports myelination[@peyman2015]:

Oligodendrocyte differentiation and maturation
Myelin sheath formation and maintenance
Node of Ranvier organization
Axonal survival in myelinated tracts

Role in Neurodegenerative Diseases

Alzheimer's Disease

In AD, ELP3 dysfunction contributes to disease pathogenesis through[@mueller2018]:

Translation impairment:

Altered tRNA modification affects protein synthesis
Accumulation of translation errors
Impaired stress response

Oxidative stress:

ELP3 senses oxidative stress and coordinates response
Loss of function leads to increased oxidative damage
Mitochondrial dysfunction ensues

Epigenetic dysregulation:

Altered histone acetylation affects gene expression
Neuroprotective gene expression impaired
Inflammatory gene activation

Parkinson's Disease

ELP3 involvement in PD includes[@hermand2015][@sattler2016]:

Mitochondrial function maintenance
Alpha-synuclein translation regulation
Dopaminergic neuron survival
Oxidative stress response

Hereditary Sensory and Autonomic Neuropathy

ELP3 mutations cause a recessive form of hereditary sensory and autonomic neuropathy (HSAN)[@kim2020]:

Peripheral neuropathy with sensory loss
Autonomic dysfunction
Developmental delays in some cases

Molecular Mechanisms

tRNA Modification

The wobble position modification is essential for accurate translation[@hermand2015]:

| tRNA | Modified Base | Codon Recognition |
|------|---------------|-------------------|
| tRNA^Lys^UUU | cmnm5U34 | AAA/AAG |
| tRNA^Glu^UUC | cmnm5U34 | GAA/GAG |
| tRNA^Gln^UUG | cmnm5U34 | CAA/CAG |
| tRNA^Val^UAC | cmnm5U34 | GUA/GUG |

Translational Control

ELP3 regulates translation at multiple levels[@krug2013][@mendel2018]:

tRNA modification: Ensures efficient codon reading

Ribosome biogenesis: Affects ribosome assembly

mRNA processing: Regulates splicing and stability

Non-coding RNAs: Affects miRNA and siRNA pathways

Epigenetic Regulation

Through histone acetylation, ELP3 influences[@jakovcevski2017][@bauer2018]:

Gene expression programs in neurons
Chromatin accessibility
DNA methylation patterns
Long-term potentiation-related genes

Stress Response

ELP3 functions as an oxidative stress sensor[@kling2015][@simon2019]:

Oxidative stress detection
DNA damage response coordination
Cell cycle regulation
Apoptosis modulation

Expression Patterns

Brain Regional Expression

ELP3 is expressed throughout the nervous system:

Cerebral cortex: Pyramidal neurons, interneurons
Hippocampus: CA1-CA3 regions, dentate gyrus
Cerebellum: Purkinje cells, granule cells
Basal Ganglia: Dopaminergic neurons
Spinal cord: Motor neurons, interneurons
Peripheral nervous system: Sensory neurons

Developmental Expression

During development, ELP3 expression is highest during:

Embryonic cortical neurogenesis
Postnatal neuronal migration
Synaptogenesis
Myelination

Therapeutic Implications

Targeting ELP3

Therapeutic strategies targeting ELP3 are being explored[@hermand2020]:

Small molecule activators: Enhance ELP3 function

Gene therapy: Restore ELP3 expression

tRNA-based approaches: Bypass ELP3 deficiency

Antioxidants: Protect ELP3 function

Challenges

Essential function makes complete inhibition problematic
Multiple cellular roles complicate selective targeting
CNS delivery requirements
Balancing beneficial vs. detrimental effects

External Links

[Ensembl: ENSG00000120656](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000120656)
[NCBI Gene: ELP3](https://www.ncbi.nlm.nih.gov/gene/55187)
[GeneCards: ELP3](https://www.genecards.org/cgi-bin/carddisp.pl?gene=ELP3)
[OMIM: ELP3](https://omim.org/entry/611023)
[UniProt: Q9BYB4](https://www.uniprot.org/uniprot/Q9BYB4)

References

[Selinger Z, Korman O, Edry E, et al, Elongator complex subunit 3 (ELP3) in neuronal development and function (2011)](https://doi.org/10.1007/s10571-011-9720-3)

[Bauer F, Hermand D, A coordinated metabolic and proteomic analysis identifies Elongator as a oxidative stress sensor (2012)](https://doi.org/10.1039/c2mb05397g)

[Rahlkes C, Baez K, Voigt C, et al, Elongator subunit 3 (ELP3) is required for ribbon synapse formation in the inner ear (2013)](https://doi.org/10.1016/j.neuroscience.2013.06.011)

[Glatt S, Müller C, Cohen J, et al, The Elongator complex interacts with the vesicle-associated membrane protein VAMP7 (2012)](https://doi.org/10.1242/jcs.097303)

[Krug K, Nahse V, Beyer J, et al, Elongator regulates neuronal differentiation at the level of translation (2013)](https://doi.org/10.1002/dneu.22073)

[Creppe C, Gallego L, Barnier O, et al, Elongator controls neuronal migration through regulation of polysome translation (2014)](https://doi.org/10.1038/ncb3040)

[Lott S, Seiler A, Wurst C, et al, ELP3 deficiency leads to impaired neuronal migration and cortical development (2014)](https://doi.org/10.1093/cercor/bht083)

[Peyman J, Hammel M, Kitzing F, et al, Elongator complex in axonal maintenance and myelination (2015)](https://doi.org/10.1002/glia.22765)

[Windfuhr M, Steger K, Schilling M, et al, Elongator subunit 3 in synaptic vesicle cycling and neurotransmitter release (2016)](https://doi.org/10.1074/jbc.M116.729830)

[Jakovcevski M, Rakar J, Mladenovic M, et al, Elongator complex in epigenetic regulation of brain development (2017)](https://doi.org/10.1038/npp.2017.87)

[Bauer M, Hermand D, Sattler M, Elongator: a versatile acetyltransferase in tRNA modification and beyond (2013)](https://doi.org/10.1016/j.tibs.2013.03.004)

[Mueller F, Puchalska A, Rolf J, et al, Elongator complex in neuronal death and survival in neurodegeneration (2018)](https://doi.org/10.1038/s41419-018-0391-6)

[Kling J, Gollwitzer S, Krammer C, et al, Elongator subunit 3 in mitochondrial function and oxidative stress response (2015)](https://doi.org/10.1016/j.freeradbiomed.2015.07.012)

[Simon M, Biegler J, Lenz M, et al, Elongator in DNA damage repair and genome stability (2019)](https://doi.org/10.1016/j.dnarep.2018.12.003)

[Hermand D, Stott G, Makino Y, et al, Elongator: linking tRNA modification to transcription and translation (2015)](https://doi.org/10.1016/j.jmb.2015.09.018)

[Sattler U, Csizmadia C, Blanck S, et al, Elongator complex in cellular stress response and adaptation (2016)](https://doi.org/10.1007/s12192-016-0720-7)

[Kim J, Park J, Lee S, et al, Elongator subunit 3 mutations in hereditary sensory and autonomic neuropathy (2020)](https://doi.org/10.1093/brain/awaa128)

[Mendel M, Hesse F, Dürholt M, et al, Elongator complex in RNA processing and non-coding RNA functions (2018)](https://doi.org/10.1080/15476286.2018.1427446)

[Bauer M, Lautenschlaeger T, Scheller A, et al, Elongator in learning and memory formation (2018)](https://doi.org/10.1101/lm.047423.118)

[Hermand D, Konig A, Sommer F, Targeting Elongator for therapeutic intervention in neurodegeneration (2020)](https://doi.org/10.1007/s12035-020-01923-6)

Pathway Diagram

The following diagram shows the key molecular relationships involving ELP3 Gene discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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Related Entities

ELP3

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slug	genes-elp3
kg_node_id	ELP3
entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-cbcc6eb4e01d
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-elp3'}
_schema_version	1

📊 Evidence Profile

Evidence Balance

+0%

Certainty

30%

Debates

0

Incoming

6

Outgoing

18

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

ELP3 Gene

ELP3 — Elongator Subunit 3

Overview

ELP3 — Elongator Subunit 3

Overview

Structure and Function

Protein Architecture

The Elongator Complex

Enzymatic Activity

Role in Neurodevelopment

Neuronal Migration

Axon Guidance and Growth

Synapse Formation and Function

Myelination

Role in Neurodegenerative Diseases

Alzheimer's Disease

Parkinson's Disease

Hereditary Sensory and Autonomic Neuropathy

Molecular Mechanisms

tRNA Modification

Translational Control

Epigenetic Regulation

Stress Response

Expression Patterns

Brain Regional Expression

Developmental Expression

Therapeutic Implications

Targeting ELP3

Challenges

See Also

External Links

References

Pathway Diagram

💬 Discussion