The TMEM186 gene helps mitochondria, the cell’s energy centers, assemble a key energy-making part called complex I. This gene plays an important role in organs that need steady energy, especially the brain and muscles. If both copies of the gene do not work properly, cells may make less energy than the body needs. People with severe TMEM186 variants can have a mitochondrial condition with symptoms such as developmental delay, low muscle tone, movement problems, or seizures.
What is a gene?
A gene is a section of DNA that carries instructions your cells use to make molecules or regulate activities in the body. Some genes provide the directions for producing proteins, which are the parts of cells that do the work. Others mainly guide when, where, and how much certain activities happen. Taken together, genes affect how the body develops and works, and they can influence how you respond to food, stress, or medicines. For a deeper look at this topic, visit the LearnHub.
Overview
TMEM186Gene function
What if the gene works
The TMEM186 gene helps mitochondria, the parts of your cells that make energy, assemble complex I, an important protein machine for energy production. This supports steady energy supply in many tissues.
Risk
What if the gene does not work
Milder to more severe variants in the TMEM186 gene can disrupt how mitochondria build complex I, part of the system cells use to make energy. This may lower complex I activity and reduce cellular energy production.
Treatment
What does that mean for your treatment
No TMEM186-specific treatment or management approach is currently established, so drug choices are not guided by a pathogenic or loss-of-function variant in the TMEM186 gene and care is based on symptoms.
Gene function
What if the gene works
Your cells need the TMEM186 gene for healthy energy production in mitochondria, the cell structures that turn food and oxygen into usable energy. Its protein sits in the inner membrane of mitochondria. A key job is helping part of this energy making system come together in the right place.
The TMEM186 gene supports energy production in mitochondria, which is how cells make much of their usable energy each day. Its protein works in the inner membrane of mitochondria, where this system is assembled and organized.
One of its main roles is to help assemble complex I (a large protein group that starts the mitochondrial energy chain). This helps cells carry out steady energy use from day to day.
What is a variant?
A genetic variant is a minor difference in the DNA sequence within a gene. These differences are common and are part of normal human variation, including traits such as appearance, metabolism, and the body’s response to environmental factors. Many variants do not lead to any noticeable changes and simply represent natural genetic diversity. In some cases, though, a variant can affect how a gene works more substantially and may contribute to, or directly cause, a genetic condition.
Genetic variants
What if the gene does not work
TMEM186 gene variants can alter the protein’s shape, stability, or placement within mitochondria, the parts of cells that handle energy production. These changes may weaken how TMEM186 interacts with other mitochondrial proteins, which can reduce the assembly or stability of complex I, a key energy-making protein group. Milder variants may only partly lower this activity, while more severe variants can greatly reduce protein production or leave the protein unable to work normally.
How variants are linked to conditions
The TMEM186 gene does not yet have a broadly confirmed link to a specific health condition, though research on TMEM186 gene variants linked to conditions is still developing. If you have a confirmed variant in the TMEM186 gene, your doctor or genetic counselor can explain what that result may mean in the context of your own health and family history.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are common throughout the general population. Most do not have a direct effect on health and simply reflect natural human variation. For many genes, carrying a variant associated with a condition indicates a possible link rather than a definite diagnosis, particularly when several genes and environmental factors also contribute. In some cases, though, a single well-characterized variant in a particular gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
There is not yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the TMEM186 gene. Anyone with questions about their own risk or family history can speak with a doctor or genetic counselor.
Inheritance of TMEM186 variants
TMEM186-related conditions are inherited in an autosomal recessive pattern. This means a person usually inherits one altered copy of the TMEM186 gene from each parent, and both parents are typically healthy carriers. For each pregnancy, two carrier parents have a 25% chance of having a child with the condition, a 50% chance of having a child who is also a carrier, and a 25% chance of having a child who inherits neither altered copy. In practical terms, the TMEM186 inheritance pattern usually appears only when both copies of the gene are altered.
What does my TMEM186 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific condition for TMEM186, and this understanding may become clearer as research grows. If you have a specific TMEM186 result, its meaning for parents, children, brothers, sisters, or other relatives depends on the exact change found and the health picture in your family.
Genetic information
Genetic testing
How you find out about variants
Variants in the TMEM186 gene are usually found through DNA testing, most often as part of a multigene panel or exome sequencing when doctors are looking for an inherited cause of symptoms. This TMEM186 genetic testing reads your DNA and compares it with a reference sequence to identify variants. Results may classify a variant as benign, pathogenic, or uncertain.
When should I consider getting a genetic test?
There is not yet a broadly established TMEM186-specific reason for genetic testing in routine care. Testing may come up as part of a broader gene panel for an inherited energy-production condition, especially if symptoms and family history point in that direction.
A genetic result is only one part of your health story
Genetic findings can provide valuable insight, but how much they explain depends on the condition and the specific type of variant. Over time, many factors, including lifestyle, environment, age, and medical history, influence how the body functions. For some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is best understood together with other parts of care. In other situations, a genetic result can give a clear answer. In areas like medication response, genetic results may help place personal experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in DNA can change how the body breaks down a drug, moves it through the body, or responds to it at its target. This helps explain why the same treatment works well for one person, has little effect in another, or causes more side effects in someone else. These differences are common and are one reason medication response can vary from person to person.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in a person’s genes can affect their response to medications. It focuses on gene and drug patterns to help explain why the same treatment may work differently from one person to another. For many medicines, genes can influence how strongly a drug works or how the body handles it. This information can help support more informed, more individualized treatment decisions. To explore this topic further, you can learn more in the LearnHub.
Drugs influenced by the TMEM186 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding how medicines are chosen or used. If you have concerns about side effects, how well a treatment is working, or other health changes, discuss them with your doctor or pharmacist.