The METTL18 gene helps cells fine tune protein production by adding a small chemical tag to part of the ribosome, the cell’s protein making machinery. If this gene does not work properly, cells may make proteins less efficiently, which can affect growth and other normal cell activities. Research on the METTL18 gene is still developing, and much of the current interest comes from cancer studies that link altered gene activity with changes in how cells grow and move.
What is a gene?
Genes are stretches of DNA that give your cells instructions for making molecules or guiding processes in the body. Some genes provide the information needed to produce proteins, the parts of cells that do much of the work. Other genes are used mainly to control when certain processes happen, where they happen, and how strongly they run. Together, genes affect how the body grows and works, and they can also shape how you respond to food, stress, or medications. For a closer look at this topic, you can find more in the LearnHub.
Overview
METTL18Gene function
What if the gene works
The METTL18 gene helps cells support ribosomes, the structures that make proteins. Its protein adds a small chemical mark to a ribosome protein, which can help protein production run smoothly.
Risk
What if the gene does not work
Changes in the METTL18 gene can range from milder to more severe variants. When the METTL18 gene works less well, a chemical tag on an RPL3 protein in the cell’s protein-making machinery may be missing, which can alter how cells build proteins.
Treatment
What does that mean for your treatment
No treatment or management approach specifically tied to the METTL18 gene is currently established in clinical guidelines. The METTL18 gene is being studied in early cancer research as a possible biomarker and drug target, but this has not changed routine treatment choices.
Gene function
What if the gene works
Your cells use the METTL18 gene to fine tune ribosomes, the structures that build proteins. It does this by adding a small chemical mark to one ribosome protein. That quiet adjustment helps routine protein production stay organized across many cell types.
METTL18 makes an enzyme that adds a small chemical mark to a ribosome protein called RPL3. This fine tuning step helps that ribosome protein do its job within the cell.
By modifying RPL3, the METTL18 gene helps the ribosome, the cell's protein making machine, work in a steady, orderly way. This supports the step by step process of building new proteins from amino acids.
Because ribosomes are active across your body, METTL18 supports everyday protein production needed for growth, repair, and normal cell maintenance. This helps explain how the METTL18 gene helps make proteins for routine body functions.
What is a variant?
A genetic variant is a slight difference 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 responds to environmental influences. Many variants do not have any noticeable effect and simply represent natural genetic variation. In some situations, though, a variant can change how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Understanding how variants influence the METTL18 gene's function starts with their effect on the protein's amount, shape, and binding inside the cell. Some changes may only partly lower METTL18 activity, while more severe variants can make the protein unstable, shorten it, or stop it from being made at all. This range can lead to milder or greater disruption of the chemical tagging step METTL18 carries out.
How variants are linked to conditions
For people trying to understand how variants in the METTL18 gene are linked to conditions, current evidence does not yet show a broadly confirmed link to one specific health condition, though this can change as research develops. Anyone with a confirmed METTL18-related diagnosis should rely on guidance from their doctor or genetic counselor rather than general information.
A variant is not necessarily a diagnosis
Genetic variants are common across the general population and are a normal feature of human biology. Most do not directly affect health and simply contribute to natural variation among people. For many genes, having a variant associated with a condition points to a possible link rather than a certain diagnosis, particularly when several genes and environmental influences play a role. Still, in some situations, one well-characterized variant in a particular gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
There isn’t yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the METTL18 gene. If a METTL18 change is found on genetic testing, a doctor or genetic counselor can help explain what it may mean for your personal and family risk.
Inheritance of METTL18 variants
There is not yet a broadly confirmed, disease-specific Mendelian pattern for the inheritance of the METTL18 gene variants, so this is not usually described as clearly autosomal dominant, autosomal recessive, or X linked. Current understanding may become clearer as research grows. The METTL18 gene is located on chromosome 17, which is an autosome, so each person inherits one copy from each parent.
What does my METTL18 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific condition for METTL18. If you have a METTL18 result and want to understand what it could mean for close relatives, a doctor or genetic counselor can explain it in the context of your exact result and family history.
Genetic information
Genetic testing
How you find out about variants
To look for variants in the METTL18 gene, labs analyze DNA from a blood sample, saliva, or a cheek swab. This kind of testing for METTL18 gene variants reads the gene’s code and compares it with a reference sequence to find changes. Results may show a benign variant, an uncertain finding, or a variant linked with a health condition.
When should I consider getting a genetic test?
There is not yet a broadly established, METTL18-specific medical reason for genetic testing in routine care. Decisions about testing are usually based on your personal health history, family history, and whether a doctor or genetic counselor thinks a broader test could be helpful.
A genetic result is only one part of your health story
Genetic findings can provide useful insight, but how much they explain varies by the condition and the type of variant present. Many factors, including lifestyle, environment, age, and medical history, also shape how the body works over time. For some conditions, especially those influenced 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, these results may help put individual experiences into perspective.
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 bloodstream, or how strongly the drug acts on its target. This helps explain why the same medication may work well for one person, seem less effective for another, or cause more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect a person’s response to medications. It studies the relationship between genes and drugs to help explain why the same treatment may work differently in different people. For many medicines, genes influence how strongly a drug works or how the body handles it. This information can support more informed, more individualized treatment decisions. To explore this subject in greater detail, you can learn more in the LearnHub.
Drugs influenced by the METTL18 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication response, so any concerns about side effects, new symptoms, or whether a treatment is working are best discussed with your doctor.