The METTL15 gene helps mitochondria, the parts of cells that make energy, build a working protein-making system. If this gene does not work properly, cells may struggle to make enough energy, especially in tissues that need a lot of it, such as the brain and muscles. People who inherit two nonworking copies of the METTL15 gene can develop a rare mitochondrial condition that may involve developmental delay, low muscle tone, seizures, or movement problems.
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 directions for producing proteins, the parts of cells that do the work. Others mainly help determine when certain processes happen, where they happen, and how strongly they occur. Taken together, genes affect how the body develops and works, and they can also influence how you respond to food, stress, or medications. To explore this topic further, you can read more in the LearnHub.
Overview
METTL15Gene function
What if the gene works
The METTL15 gene helps mitochondria assemble ribosomes, the cell parts that make proteins needed for energy production. This supports normal mitochondrial function and steady energy supply in cells.
Risk
What if the gene does not work
Variants in the METTL15 gene can range from milder to more severe and may reduce a small chemical mark on mitochondrial ribosomal RNA by different amounts. This can weaken mitochondrial protein production and the cell’s ability to make energy.
Treatment
What does that mean for your treatment
A pathogenic variant in the METTL15 gene does not currently change drug choices in any guideline-based way, and no METTL15-specific treatment or management approach is established.
Gene function
What if the gene works
Inside mitochondria, the METTL15 gene helps prepare the machinery that makes a small set of proteins used for energy production. Its work is very specific: it adds a tiny chemical tag to mitochondrial RNA and supports smooth protein making. In plain terms, METTL15 gene function in mitochondria helps your cells support normal energy production.
METTL15 adds a tiny chemical tag to mitochondrial 12S ribosomal RNA, a working RNA that helps build proteins in mitochondria. This tag helps the RNA take the right shape for normal protein making.
It helps the small mitochondrial ribosome mature, which is part of the cell’s protein making machinery. That supports steady reading of mitochondrial instructions.
By supporting protein making inside mitochondria, this gene helps cells produce parts needed for ATP, the cell’s main energy source. This is part of normal energy production in many tissues.
What is a variant?
A genetic variant is a small difference in the DNA sequence within a gene. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, or how the body responds to environmental influences. Many have no noticeable effect and simply represent natural genetic variation. In some cases, though, a variant can change how a gene functions more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the METTL15 gene can reduce or abolish the protein’s ability to place a small chemical mark on mitochondrial ribosomal RNA, which helps cells build protein-making machinery inside mitochondria. Some METTL15 gene variants mildly lower the protein’s activity or stability, while more severe variants can stop this marking almost completely. This can make mitochondrial protein production less efficient at the cellular level.
How variants are linked to conditions
The METTL15 gene does not yet have a broadly confirmed link to a specific health condition, although research on METTL15 gene variants and disease is still developing. If you have a reported variant in the METTL15 gene or a METTL15-related finding on genetic testing, your doctor or genetic counselor can explain what that result may mean for you and your family.
A variant is not necessarily a diagnosis
Genetic variants are a normal feature of human biology and are common throughout the general population. Most do not have a direct effect on health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when more than one gene and environmental factors also play a role. In some cases, though, a single well-characterized variant in a specific 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 METTL15 gene. If a METTL15 change is found on testing, a doctor or genetic counselor can help explain what it may mean for your personal and family risk.
Inheritance of METTL15 variants
There is not yet a broadly confirmed, disease-linked Mendelian pattern for the inheritance of METTL15 gene variants, so the inheritance of METTL15 gene variants is still being clarified as research develops. The METTL15 gene is located on an autosome, which means you inherit one copy from each parent. In general, variants in autosomal genes can be passed from either parent to a son or a daughter.
What does my METTL15 result mean for my family?
There isn't yet a broadly confirmed inheritance pattern tied to a specific condition for the METTL15 gene, though this understanding can change as research develops. If you have a specific METTL15 result and questions about what it could mean for your family, a doctor or genetic counselor can explain it in the context of your personal and family history.
Genetic information
Genetic testing
How you find out about variants
METTL15 genetic testing usually uses a blood or saliva sample. A lab reads the DNA sequence of the METTL15 gene, often as part of a multigene panel, exome, or genome test, and reports whether a variant is found and how it is classified, such as benign, uncertain, or pathogenic.
When should I consider getting a genetic test?
There is not yet a broadly established METTL15-specific reason for genetic testing in routine care. Testing decisions are usually guided by the full pattern of symptoms and family history and are best made with a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic result can provide useful insight, but what it can tell you varies based on the condition and the kind of variant involved. Lifestyle, environment, age, and medical history are among the many factors that influence how the body functions over time. For some conditions, especially those affected by many genes, genetic information offers context rather than certainty and is most helpful when considered alongside other parts of care. In other situations, a genetic result may give a clear answer. In areas such as medication response, genetic results can also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. This helps explain why the same treatment works well for one person, seems weaker in another, or causes more side effects in someone else. Part of the difference comes from how the body breaks down, moves, or responds to a drug, and inherited DNA changes are one common reason for that variation.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in genes can affect the way a person responds to medications. It studies gene drug patterns to help explain why the same treatment may work differently from one person to another. With many medicines, genes can influence how strongly the drug works or how the body handles it. Understanding this can support treatment decisions that are more informed and more individualized. More detail on this topic is available in the LearnHub.
Drugs influenced by the METTL15 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 questions about treatment, side effects, or medication changes are best discussed with your doctor or pharmacist.