The TRMT5 gene helps cells modify transfer RNA, a small molecule needed to build proteins, especially in mitochondria, the parts of cells that make energy. If the TRMT5 gene does not work properly, cells may struggle to produce enough energy, which can lead to a mitochondrial condition with features such as developmental delay, muscle weakness, heart problems, or poor growth. Many variants are harmless, while a few may change how the gene supports energy production.
What is a gene?
Genes are sections of DNA that carry instructions your cells use to make molecules or regulate processes in the body. Some genes provide the information needed to produce proteins, the parts of cells that do the work. Other genes mostly direct when certain processes occur, where they occur, and how strongly they are carried out. As a group, genes affect how the body develops and functions, and they can also influence how you respond to food, stress, or medications. To go deeper into this topic, you can find more in the LearnHub.
Overview
TRMT5Gene function
What if the gene works
The TRMT5 gene helps cells fine tune transfer RNA, a molecule needed to build proteins. This supports accurate protein production in mitochondria, the parts of cells that help make energy.
Risk
What if the gene does not work
Variants in the TRMT5 gene can impair mitochondrial energy production. Milder to more severe variants are linked to a mitochondrial condition that may range from exercise intolerance and muscle weakness to developmental delay, poor growth, and episodes of lactic acidosis.
Treatment
What does that mean for your treatment
No treatment or drug-choice approach specific to pathogenic variants in the TRMT5 gene is currently established.
Conditions associated with TRMT5
Gene function
What if the gene works
Your cells use the TRMT5 gene to keep protein building accurate, especially in mitochondria, the parts of cells that make energy. It prepares transfer RNA, a small helper that carries amino acids, the building blocks of protein. This careful setup helps cells make proteins in a steady, reliable way.
The TRMT5 gene adds a small chemical tag to certain transfer RNA molecules near the spot that reads the genetic code. This fine tunes these helpers before they take part in protein building.
That tag helps transfer RNA keep the code lined up correctly during protein assembly. It supports smoother protein building and reduces reading slips.
In mitochondria, the TRMT5 gene helps make proteins used in energy production. This supports steady cell activity in tissues that need a reliable energy supply.
What is a variant?
A genetic variant is a minor change in the DNA sequence within a gene. These changes are common and are part of normal human diversity, including differences in appearance, metabolism, and the way the body reacts to environmental influences. Many variants do not have any noticeable effect and simply represent natural genetic variation. At times, though, a variant can change how a gene works to a greater extent and may contribute to, or directly cause, a genetic condition.
Genetic variants
What if the gene does not work
Variants in the TRMT5 gene can weaken or destabilize the enzyme that places a small chemical mark on transfer RNA, which can disrupt mitochondrial protein production. Milder missense variants may leave some enzyme activity, while more disruptive variants can sharply reduce activity, alter folding, or interfere with transfer RNA binding. This helps explain how TRMT5 gene variants affect protein function and why people with greater functional loss may develop mitochondrial disease earlier or with broader features.
How variants are linked to conditions
Pathogenic variants in both copies of the TRMT5 gene cause a rare inherited mitochondrial condition called combined oxidative phosphorylation deficiency 26. Reports on TRMT5 gene variants and mitochondrial disease describe developmental delay, muscle weakness, movement or balance problems, short stature, and sometimes hearing loss. Features and severity can differ widely from one person to another.
A variant is not necessarily a diagnosis
Variants in DNA are a usual feature of human biology and are widespread across the population. Most do not directly affect health and simply reflect natural human variation. For many genes, having a variant connected with a condition points to a possible link, not a certain diagnosis, especially when several genes and environmental influences play a part. In some situations, though, one well-studied 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 risks related to the TRMT5 gene. In families with a disease-causing TRMT5 change, risk is mainly shaped by the inherited gene change itself rather than lifestyle or common environmental factors.
Inheritance of TRMT5 variants
Variants in the TRMT5 gene are inherited in an autosomal recessive pattern. This means a person usually develops a TRMT5-related condition only when they inherit one nonworking copy from each parent. Parents who each carry one variant are often unaffected, and with each pregnancy they have a 25% chance of having an affected child, a 50% chance of having a child who is a carrier, and a 25% chance of having a child without the familial variants. In families affected by TRMT5-related disease, the inheritance of TRMT5 gene variants follows this same pattern.
What does my TRMT5 result mean for my family?
For TRMT5, the main family implication is usually a recessive pattern, which means parents are often healthy carriers and brothers or sisters may also be carriers or, less often, have the condition. Close relatives may want to learn whether the same gene change is present in the family. This mainly matters for family planning and for understanding whether similar symptoms in relatives could have the same cause.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for the TRMT5 gene looks for variants in a blood or saliva sample, usually by reading the gene’s DNA sequence in a lab. This can show whether a person carries a disease-causing variant, a benign variant, or a result that needs more interpretation alongside symptoms and family history.
When should I consider getting a genetic test?
Testing that includes the TRMT5 gene may be worth considering if someone has signs of a rare inherited condition that affects how the body makes energy, such as developmental delay, muscle weakness, movement problems, or seizures. It can also make sense when similar unexplained problems run in the family.
A genetic result is only one part of your health story
A genetic finding can provide useful insight, but how much it reveals varies based on the condition and the type of variant involved. Lifestyle, environment, age, and medical history are among the many factors that shape how the body functions over time. For some conditions, especially those influenced by many genes, genetic information provides context rather than certainty and is most helpful when viewed alongside other parts of care. In other situations, a genetic result can offer a clear answer. In areas such as medication response, genetic results can also help make individual experiences easier to understand.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in genes can change how the body breaks down a drug, moves it through the bloodstream, or responds to it at its target. This helps explain why the same treatment works well for one person, works less well for 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 genetic differences affect the way people respond to medications. It studies links between genes and drugs to help explain why the same treatment can work differently from one person to another. For many medicines, genes influence both how strongly a drug works and how the body handles it. This information can support more informed, more individualized treatment choices. More on this topic is available in the LearnHub.
Drugs influenced by the TRMT5 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how people respond to medicines, so any concerns about side effects, new symptoms, or whether a treatment is right for you are best discussed with your doctor.