TMEM135 Protein

TMEM135 Protein

Overview

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">TMEM135 Protein</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>TMEM135</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>TMEM135</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Protein</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td><a href="https://www.uniprot.org/uniprot/?query=TMEM135" target="_blank">Search UniProt</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

TMEM135 is a membrane-associated organelle regulator that links [mitochondrial dynamics](/mechanisms/mitochondrial-dynamics-pathway) and [peroxisomal dysfunction](/mechanisms/peroxisomal-dysfunction). Evidence in mammalian systems indicates that TMEM135 helps coordinate mitochondrial fission, peroxisome-related lipid processing, and energetic adaptation under cellular stress.

In NeuroWiki terms, TMEM135 is best viewed as a network-modulating protein rather than a primary monogenic driver of classic neurodegenerative syndromes. Current human disease associations are strongest in retina/hearing phenotypes and metabolic stress biology, while neurodegeneration relevance is mechanistically plausible but still early-stage.[@zhou2023][@nam2025]

Molecular Architecture and Subcellular Context

TMEM135 Protein

Overview

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">TMEM135 Protein</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>TMEM135</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>TMEM135</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Protein</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td><a href="https://www.uniprot.org/uniprot/?query=TMEM135" target="_blank">Search UniProt</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

TMEM135 is a membrane-associated organelle regulator that links [mitochondrial dynamics](/mechanisms/mitochondrial-dynamics-pathway) and [peroxisomal dysfunction](/mechanisms/peroxisomal-dysfunction). Evidence in mammalian systems indicates that TMEM135 helps coordinate mitochondrial fission, peroxisome-related lipid processing, and energetic adaptation under cellular stress.

In NeuroWiki terms, TMEM135 is best viewed as a network-modulating protein rather than a primary monogenic driver of classic neurodegenerative syndromes. Current human disease associations are strongest in retina/hearing phenotypes and metabolic stress biology, while neurodegeneration relevance is mechanistically plausible but still early-stage.[@zhou2023][@nam2025]

Molecular Architecture and Subcellular Context

TMEM135 is a multi-pass transmembrane protein localized to mitochondrial and peroxisome-associated membranes, where it influences organelle morphology and substrate flux.[@exil2021][@zaveri2025] Unlike catalytic enzymes, TMEM135 appears to function as an organizational or trafficking regulator inside the mitochondrial-peroxisome axis.[@exil2021][@zaveri2023]

Key context:

• Mitochondria and peroxisomes cooperate in fatty-acid handling, redox control, and membrane-lipid maintenance.[@zaveri2025][@passmore2008]
• TMEM135 perturbation changes organelle morphology and bioenergetic state in model systems.[@exil2021][@zhou2023]
• TMEM135-related phenotypes in vivo frequently cluster around tissues with high metabolic demand, especially retina and sensory systems.[@nam2025][@lee2016]

Core Biological Functions

1. Mitochondrial Dynamics Coupling

Experimental data support a role for TMEM135 in mitochondrial fission-state control and adaptation during energetic demand.[@exil2021][@zhou2023] This places TMEM135 upstream of mitochondrial quality-control logic that also intersects with [DRP1](/proteins/drp1-protein), [mitophagy](/mechanisms/mitophagy), and oxidative stress buffering pathways.[@gao2021][@giacomello2017]

2. Peroxisomal Lipid Homeostasis

TMEM135 participates in peroxisome-linked lipid handling, including pathways relevant to very-long-chain fatty acids and docosahexaenoic acid (DHA) balance in some systems.[@zaveri2023][@passmore2008] Because neuronal membranes are lipid-intensive and synaptic function is lipid-sensitive, disruption in peroxisomal support can have downstream CNS effects even when the initial defect is metabolic.[@passmore2008][@berger2013]

3. Stress Adaptation Across Organelle Compartments

TMEM135 appears to act at an interface where mitochondrial and peroxisomal stress responses are coordinated.[@exil2021][@zaveri2023] This systems role may be more important than a single molecular interaction, particularly in aging tissues where cumulative oxidative and energetic stress rises.

Neurodegeneration-Relevant Interpretation

Mitochondrial Vulnerability Logic

Mitochondrial dysfunction is a convergent mechanism across [Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease), and related [tau](/proteins/tau)/synuclein disorders.[@gao2021][@giacomello2017][@lin2006] TMEM135 does not yet have strong direct causal evidence in these diseases, but its mechanistic position is relevant because it influences the same organelle-control layer that fails in vulnerable [neurons](/entities/neurons).

Practical interpretation:

• TMEM135 is a modifier candidate for neuronal stress resilience, not a confirmed high-penetrance neurodegeneration gene.
• TMEM135-aligned biology is most useful for pathway modeling (mitochondria-peroxisome axis) and biomarker hypothesis generation.

Retinal and Sensory Phenotypes as Translational Signals

Several TMEM135 studies show retinal pathology and progressive hearing phenotypes in mutation models.[@nam2025][@lee2016] These findings are valuable for neurodegeneration research because retina and auditory pathways can serve as measurable windows into early bioenergetic and organelle dysfunction in aging brains.

Metabolic-Neurodegenerative Interface

TMEM135 has reproducible links to systemic metabolic phenotypes (hepatic lipid handling, adipose energy balance, and stress adaptation).[@zaveri2025][@zaveri2023][@arnold2018] Since metabolic syndrome and insulin resistance worsen risk trajectories in dementia and movement disorders, TMEM135 may be important in the metabolic amplification layer of neurodegeneration risk rather than as a direct trigger.[@lin2006][@arnold2018]

Evidence Quality and Current Limits

What is relatively strong

• Cell and animal evidence that TMEM135 modulates mitochondrial/peroxisomal biology.[@exil2021][@zhou2023][@zaveri2023]
• In vivo phenotypes involving high-energy tissues (retina, hearing systems).[@nam2025][@lee2016]

What remains weak or unresolved

• Large human longitudinal datasets tying TMEM135 variation to AD/PD/CBD/PSP outcomes.
• Standardized CNS biomarker studies directly measuring TMEM135-dependent biology in patients.
• Intervention data showing that TMEM135-directed modulation changes neurodegenerative clinical endpoints.

Translational and Experimental Priorities

High-value next steps:

Clinical and Knowledge-Graph Relevance

For NeuroWiki curation, TMEM135 is most useful when linked across:

• Organelle quality-control pages (mitochondrial dynamics, mitophagy, peroxisomal pathways)
• Disease pages with strong metabolic/mitochondrial burden
• Biomarker pages focused on lipid metabolism, oxidative stress, and early tissue vulnerability

See Also

• [TMEM135 Gene](/genes/tmem135)
• [Mitochondrial Dynamics Pathway in Neurodegeneration](/mechanisms/mitochondrial-dynamics-pathway)
• [Mitophagy](/mechanisms/mitophagy)
• [Peroxisomal Dysfunction](/mechanisms/peroxisomal-dysfunction)
• [DRP1 Protein](/proteins/drp1-protein)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)

External Links

• [UniProt: TMEM135 (Q9C0C4)](https://www.uniprot.org/uniprotkb/Q9C0C4)
• [NCBI Gene: TMEM135](https://www.ncbi.nlm.nih.gov/gene/57528)
• [NCBI Protein resources](https://www.ncbi.nlm.nih.gov/protein)

References