Gasdermin E Protein
Pathway Diagram
flowchart TD
GSDME["GSDME Protein"]
CASP3["Caspase-3"]
GRZB["Granzyme B"]
p53["p53 Tumor Suppressor"]
NLRP3["NLRP3 Inflammasome"]
ROS["Reactive Oxygen Species"]
Pyroptosis["Pyroptosis"]
MitoDamage["Mitochondrial Damage"]
MitoDepol["Mitochondrial Depolarization"]
AxonLoss["Axon Loss"]
ALS["Amyotrophic Lateral Sclerosis"]
Neuron["Neuronal Expression"]
TumorSupp["Tumor Suppression"]
AntiTumor["Anti-Tumor Immunity"]
p53 --"transcriptional activation"--> GSDME
NLRP3 --"inflammatory activation"--> GSDME
CASP3 --"proteolytic cleavage"--> GSDME
GRZB --"proteolytic cleavage"--> GSDME
ROS --"oxidative cleavage"--> GSDME
GSDME --"membrane pore formation"--> Pyroptosis
GSDME --"organelle disruption"--> MitoDamage
GSDME --"membrane potential loss"--> MitoDepol
GSDME --"neuronal degeneration"--> AxonLoss
GSDME --"expressed in"--> Neuron
GSDME --"pathological involvement"--> ALS
GSDME --"protective function"--> TumorSupp
GSDME --"immune activation"--> AntiTumor
style GSDME fill:#006494,color:#e0e0e0
style TumorSupp fill:#1b5e20,color:#e0e0e0
style AntiTumor fill:#1b5e20,color:#e0e0e0
style Pyroptosis fill:#ef5350,color:#0d0d1a
style AxonLoss fill:#ef5350,color:#0d0d1a
style ALS fill:#ef5350,color:#0d0d1a
style p53 fill:#4a1a6b,color:#e0e0e0
style NLRP3 fill:#4a1a6b,color:#e0e0e0
title: Gasdermin E Protein
description: Gasdermin E, DFNA5 gene product, caspase-3 activated pyroptosis executor, chemotherapy-induced cell death
...Gasdermin E Protein
Pathway Diagram
Mermaid diagram (expand to render)
title: Gasdermin E Protein
description: Gasdermin E, DFNA5 gene product, caspase-3 activated pyroptosis executor, chemotherapy-induced cell death
<div class="infobox infobox-protein">
<table>
<tr><th colspan="2">Gasdermin E Protein</th></tr>
<tr><td><strong>Symbol</strong></td><td>GSDME / DFNA5</td></tr>
<tr><td><strong>Full Name</strong></td><td>Gasdermin E (Deafness, Autosomal Dominant 5)</td></tr>
<tr><td><strong>Gene</strong></td><td>[GSDME](/genes/gsdme) (DFNA5)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[O60443](https://www.uniprot.org/uniprotkb/O60443)</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>55.4 kDa</td></tr>
<tr><td><strong>Length</strong></td><td>496 amino acids</td></tr>
<tr><td><strong>Subcellular Location</strong></td><td>Cytoplasm, plasma membrane (upon activation)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>[Alzheimer's Disease](/diseases/alzheimers-disease), Deafness DFNA5, Cancer</td></tr>
</table>
</div>
Overview
--- is a protein encoded by the [GSDME](/genes/gsdme) gene that ### Pyroptosis Induction. This page describes its structure, normal nervous system function, role in neurodegenerative disease, and potential as a therapeutic target.
Structure
Gasdermin E (GSDME, formerly DFNA5) is a member of the gasdermin family with pore-forming capability:
Domain Architecture
- N-terminal domain (NTD) (residues 1-270): Pore-forming domain
- Linker region (residues 271-287): Contains caspase-3 cleavage site
- C-terminal domain (CTD) (residues 288-496): Autoinhibitory domain
Autoinhibition
- Similar to [GSDMD](/proteins/gsdmd), CTD masks the NTD in the full-length protein
- Cleavage by caspase-3 releases the cytotoxic NTD
- NTD forms pores with similar structure to GSDMD NTD
Unique Features
- Originally identified as deafness gene DFNA5
- Expressed in cochlea, brain, and other tissues
- Low basal expression in many cell types, inducible by p53
Normal Function
Pyroptosis Induction
GSDME mediates a secondary form of pyroptosis:
Caspase-3 cleavage: Unlike GSDMD, GSDME is cleaved by executioner caspase-3
[Apoptosis](/entities/apoptosis)-to-pyroptosis switch: Converts apoptosis to pyroptosis when cleaved
Secondary necrosis: Responsible for secondary necrosis after apoptosisPhysiological Roles
- Inner ear function: Required for normal cochlear function
- p53 target: GSDME expression is induced by p53
- Tumor suppression: May function as tumor suppressor
Role in Neurodegeneration
Alzheimer's Disease
Emerging evidence links GSDME to AD:
Caspase-3 activation: AD brains show elevated caspase-3 activity
Pyroptosis contribution: GSDME may contribute to neuronal pyroptosis
Secondary necrosis: May mediate secondary necrosis in advanced AD
Inflammation: GSDME pores release DAMPs and amplify inflammationNeuronal Cell Death
- Caspase-3 dependent: Many neurodegenerative conditions involve caspase-3 activation
- Switch to pyroptosis: GSDME converts apoptotic [neurons](/entities/neurons) to pyroptotic death
- Inflammatory amplification: Pyroptosis releases inflammatory mediators
Chemotherapy-Induced Neurotoxicity
- Chemotherapy side effects: Some chemotherapies activate GSDME in neurons
- Peripheral neuropathy: GSDME may contribute to chemotherapy-induced neuropathy
- Cognitive effects: Potential role in "chemo brain"
Molecular Mechanisms
Caspase-3 Activation
| Context | Activator | Cleavage Site |
|---------|-----------|---------------|
| Apoptosis | Caspase-3 (downstream of apoptosome) | D270 |
| Chemotherapy | Caspase-3 (DNA damage response) | D270 |
| TNF signaling | Caspase-3 (extrinsic pathway) | D270 |
- NTD binds to inner leaflet phospholipids
- Forms ~15 nm pores in plasma membrane
- Allows IL-1β release and osmotic lysis
- Creates conduit for DAMP release
Difference from GSDMD
| Feature | GSDME | GSDMD |
|---------|-------|-------|
| Primary caspase | Caspase-3 | Caspase-1/4/5/11 |
| Activation pathway | Apoptotic/Extrinsic | Inflammasome |
| Typical context | Secondary necrosis, chemotherapy | Infection, sterile inflammation |
| Tissue expression | Low/inducible | Higher/myeloid |
Therapeutic Targeting
Cancer Therapy
- Chemotherapy sensitization: GSDME expression enhances chemo efficacy
- Immunogenic cell death: GSDME-mediated pyroptosis releases tumor antigens
- Combination therapy: p53 activators + chemotherapy to induce GSDME
Neuroprotection
- Caspase-3 inhibitors: Block GSDME cleavage
- GSDME-specific inhibitors: Prevent pore formation
- p53 modulation: Reduce GSDME induction in neurons
Hearing Preservation
- DFNA5-related deafness: Understanding GSDME function aids therapy development
- Gene therapy: Potential for DFNA5-related hearing loss
Key Interactions
| Interacting Protein | Function | Disease Relevance |
|-------------------|----------|-------------------|
| Caspase-3 | Cleaves GSDME at D270 | Apoptosis, chemotherapy |
| p53 | Transcriptional activator of GSDME | Cancer, DNA damage |
| BCL2 family | Regulates apoptotic pathway upstream | Neurodegeneration |
| Apaf1 | Forms apoptosome | Intrinsic apoptosis |
See Also
- [GSDME Gene](/genes/gsdme)
- [GSDMD](/proteins/gsdmd)
- [Pyroptosis](/mechanisms/pyroptosis)
- [Caspase-3](/proteins/casp3)
- [Apoptosis in Neurodegeneration](/mechanisms/apoptosis-neurodegeneration)
External Links
- [UniProt: O60443](https://www.uniprot.org/uniprotkb/O60443)
- [NCBI Gene: 1696](https://www.ncbi.nlm.nih.gov/gene/1696)
- [OMIM: 608798](https://www.omim.org/entry/608798)
References
[Rogers et al., GSDME is cleaved by caspase-3 (2017) (2017)](https://doi.org/10.1038/nature22399)
[Wang et al., GSDME mediates chemotherapy-induced pyroptosis (2017) (2017)](https://doi.org/10.1016/j.ccell.2017.09.004)
[Lee et al., GSDME function and regulation (2018) (2018)](https://doi.org/10.1038/s41418-018-0118-1)
[Zhou et al., Caspase-3-mediated cleavage of GSDME (2020) (2020)](https://doi.org/10.1038/s41418-020-0556-7)
[Tixeira et al., GSDME in neurodegeneration (2022) (2022)](https://doi.org/10.3389/fncel.2022.842477)
[Van Laer et al., DFNA5/GSDME and deafness (1998) (1998)](https://doi.org/10.1038/ng0198-47)
[Zhang et al., GSDME as cancer target (2020) (2020)](https://doi.org/10.1038/s41568-020-00321-5)
[Jiang et al., GSDME converts apoptosis to pyroptosis (2020) (2020)](https://doi.org/10.1126/sciimmunol.aaz9688)
[Yu et al., p53 regulates GSDME expression (2019) (2019)](https://doi.org/10.1016/j.molcel.2019.06.014)
[Xia et al., Gasdermin family in disease (2021) (2021)](https://doi.org/10.1038/s41583-021-00465-2)Pathway Diagram
The following diagram shows the key molecular relationships involving Gasdermin E Protein discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)