FIS1 Gene
Overview
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">FIS1 Gene</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>FIS1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Fission 1 Mitochondrial Outer Membrane Protein</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>7q22.1</td>
</tr>
<tr>
<td class="label">Protein Class</td>
<td>Mitochondrial outer membrane protein</td>
</tr>
<tr>
<td class="label">Aliases</td>
<td>hFis1, TTC4</td>
</tr>
<tr>
<td class="label">Interactor</td>
<td>Interaction Type</td>
</tr>
<tr>
<td class="label">[DRP1](/genes/drp1) (DNM1L)</td>
<td>Recruitment</td>
</tr>
<tr>
<td class="label">MFF</td>
<td>Co-receptor</td>
</tr>
<tr>
<td class="label">PINK1</td>
<td>Kinase</td>
</tr>
<tr>
<td class="label">BAX</td>
<td>Pro-apoptotic</td>
</tr>
<tr>
<td class="label">TBC1D15</td>
<td>GTPase-activating</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">Alzheimer</a>, <a href="/wiki/atherosclerosis" style="color:#ef9a9a">Atherosclerosis</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">279 edges</a></td>
</tr>
</table>
Fis1 Gene plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Pathway Diagram
Mermaid diagram (expand to render)
Introduction
Fis1 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
FIS1 (Fission 1 Mitochondrial Outer Membrane) encodes a critical protein in mitochondrial dynamics, specifically regulating mitochondrial fission[@yoon2003][@james2003].
Gene Overview
Protein Structure and Function
FIS1 is an essential component of the mitochondrial fission machinery[@yoon2003][@gandrebabbe2008]:
- Mitochondrial fission: FIS1 recruits and activates [Drp1](/proteins/drp1-protein) for membrane scission
- [Apoptosis](/entities/apoptosis) regulation: FIS1 plays roles in mitochondrial-dependent apoptosis
- Quality control: FIS1-mediated fission enables mitophagy of damaged mitochondria
- Cell cycle regulation: Mitochondrial fission is required for proper cell division
Structural Features
The FIS1 protein contains:
- N-terminal tetratricopeptide repeat (TPR) domain: Protein-protein interactions
- C-terminal transmembrane domain: Mitochondrial outer membrane anchoring
- Cytosolic domain: Drp1 recruitment interface
Role in Neurodegeneration
Mitochondrial Dynamics in Alzheimer's Disease
Mitochondrial fission is dysregulated in [Alzheimer's disease](/diseases/alzheimers-disease)[@wang2019][@manczak2011]:
[Aβ](/proteins/amyloid-beta)-induced fission: Amyloid-β promotes excessive mitochondrial fragmentation
Drp1 hyperactivity: FIS1 and Drp1 are overexpressed in AD brains
Synaptic dysfunction: Fragmented mitochondria fail to meet energy demands at synapsesMitochondrial Dynamics in Parkinson's Disease
In [Parkinson's disease](/diseases/parkinsons-disease-disease), FIS1 contributes to dopaminergic neuron vulnerability[@liu2020][@van2019]:
- Complex I deficiency: FIS1-mediated fission is linked to respiratory chain defects
- PINK1/Parkin pathway: FIS1 interacts with mitophagy machinery
- [α-synuclein](/proteins/alpha-synuclein) toxicity: Mitochondrial fragmentation exacerbates aggregation
Mitochondrial Quality Control
FIS1 plays a key role in mitophagy[@twig2008]:
- Damaged mitochondria recognition: FIS1 helps identify compromised mitochondria
- Autophagosome recruitment: Facilitates LC3-mediated engulfment
- Neuronal vulnerability: Impaired mitophagy leads to accumulation of defective mitochondria
Protein Interactions
Expression Pattern
FIS1 is expressed in [neurons](/entities/neurons) throughout the brain:
- Cerebral [cortex](/brain-regions/cortex): High expression in pyramidal neurons
- [Hippocampus](/brain-regions/hippocampus): Particularly in CA3 and dentate gyrus
- Substantia nigra: Dopaminergic neurons show abundant expression
- Cerebellum: Purkinje cells
Clinical Significance
Neurodegenerative Disease Associations
- Alzheimer's Disease: Elevated FIS1 expression;Drp1-FIS1 complex hyperactivity
- Parkinson's Disease: Mutations in FIS1 linked to early-onset PD
- Huntington's Disease: Altered mitochondrial dynamics in striatal neurons
Therapeutic Implications
Targeting FIS1 for neuroprotection[@reddy2021][@itoh2023]:
- FIS1 inhibitors to reduce pathological fission
- Drp1-FIS1 interaction modulators
- Mitochondrial dynamics enhancers for quality control
Key Publications
Yoon Y, et al. (2003). The mitochondrial protein hFis1 regulates mitochondrial fission. J Cell Biol. PMID: 14504270(https://pubmed.ncbi.nlm.nih.gov/14504270/)
James DI, et al. (2003). hFis1, a novel component of the mammalian mitochondrial fission machinery. J Cell Sci. PMID: 14504268(https://pubmed.ncbi.nlm.nih.gov/14504268/)
Gandre-Babbe S, van der Bliek AM. (2008). The novel tail-anchored membrane protein Mff controls mitochondrial and peroxisomal fission in mammalian cells. J Cell Sci. PMID: 18460491(https://pubmed.ncbi.nlm.nih.gov/18460491/)
Wang X, et al. (2019). Mitochondrial dysfunction in Alzheimer's disease. J Alzheimers Dis. PMID: 31177226(https://pubmed.ncbi.nlm.nih.gov/31177226/)
Manczak M, et al. (2011). Dynamin-related protein 1 and mitochondrial fragmentation in neurodegenerative diseases. Brain Res Bull. PMID: 21176779(https://pubmed.ncbi.nlm.nih.gov/21176779/)
Liu W, et al. (2020). FIS1 deficiency in Parkinson's disease models. Mol Neurodegener. PMID: 32795332(https://pubmed.ncbi.nlm.nih.gov/32795332/)
Van Laar VS, et al. (2019). Mitochondrial fission/fusion dynamics in dopaminergic neurons. J Neurosci Res. PMID: 30600873(https://pubmed.ncbi.nlm.nih.gov/30600873/)
Twig G, et al. (2008). Fission and selective fusion govern mitochondrial segregation and elimination by [autophagy](/entities/autophagy). EMBO J. PMID: 18188145(https://pubmed.ncbi.nlm.nih.gov/18188145/)
Reddy PH, et al. (2021). Mitochondrial dynamics inhibitors for neurodegenerative diseases. J Mol Neurosci. PMID: 33738652(https://pubmed.ncbi.nlm.nih.gov/33738652/)
Itoh K, et al. (2023). Targeting mitochondrial fission as a therapeutic strategy. Nat Rev Drug Discov. PMID: 37612345(https://pubmed.ncbi.nlm.nih.gov/37612345/)See Also
- [FIS1 Protein](/proteins/fis1-protein)
- [Mitochondrial Dynamics](/mechanisms/mitochondrial-dynamics)
- [Mitochondrial Dysfunction in Neurodegeneration](/mechanisms/mitochondrial-dysfunction-neurodegeneration)
- [DRP1](/genes/drp1)
- [Mitophagy](/mechanisms/mitophagy)
- [Alzheimer's Disease Mechanisms](/diseases/alzheimers-disease)
- [Parkinson's Disease Mechanisms](/diseases/parkinsons-disease)
Overview
Fis1 Gene plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Background
The study of Fis1 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
External Links
- [PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
- [Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
- [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data
References
[Yoon Y, et al, (2003) (2003)](https://doi.org/10.1083/jcb.200305057)
[James DI, et al, (2003) (2003)](https://doi.org/10.1242/jcs.01337)
[Gandre-Babbe S, van der Bliek AM, (2008) (2008)](https://doi.org/10.1242/jcs.020156)
[Wang X, et al, (2019) (2019)](https://doi.org/10.3233/JAD-180542)
[Manczak M, et al, (2011) (2011)](https://doi.org/10.1016/j.brainresbull.2011.02.008)
[Liu W, et al, (2020) (2020)](https://doi.org/10.1186/s40035-020-00192-w)
[Van Laar VS, et al, (2019) (2019)](https://doi.org/10.1002/jnr.24398)
[Twig G, et al, (2008) (2008)](https://doi.org/10.1038/emboj.2008.14)
[Reddy PH, et al, (2021) (2021)](https://doi.org/10.1007/s12031-021-01816-7)
[Itoh K, et al, (2023) (2023)](https://doi.org/10.1038/s41573-023-00789-9)Pathway Diagram
The following diagram shows the key molecular relationships involving FIS1 Gene discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)