The TMPRSS5 gene helps cells make a protein that sits at the cell surface and appears to support normal function in the inner ear. If this gene does not work properly, hearing may be affected, and some people develop inherited hearing loss. Many variants are harmless, while a few may change how the gene supports hearing. Genetic results involving the TMPRSS5 gene are mainly used to help explain hearing loss that runs in families.
What is a gene?
A gene is a stretch of DNA that carries instructions cells use to make molecules or to regulate processes throughout the body. Some genes provide the directions for producing proteins, the parts of cells that do much of the work. Others mainly guide when certain processes happen, where they happen, and how active they are. Taken together, genes affect how the body grows and works, and they can influence how you respond to food, stress, or medications. For a deeper look at this topic, you can find more in the LearnHub.
Overview
TMPRSS5Gene function
What if the gene works
The TMPRSS5 gene helps make a protein that cuts other proteins at the cell surface. It is active in the inner ear and appears to support the normal function of cells needed for hearing.
Risk
What if the gene does not work
Milder variants in the TMPRSS5 gene may partly reduce this cell surface protein cutting enzyme’s activity, while more severe variants can greatly disrupt protein processing and signaling between cells.
Treatment
What does that mean for your treatment
No treatment or management approach specific to the TMPRSS5 gene is currently established for people with a pathogenic variant. At present, this result does not guide drug choice.
Gene function
What if the gene works
Clear hearing depends on finely tuned work inside the inner ear. The TMPRSS5 gene helps by making a surface enzyme that trims certain proteins in a controlled way. This activity supports normal signaling and maintenance in hearing related cells.
Its protein sits at the cell surface and acts as a serine protease (an enzyme that cuts other proteins at specific spots). This controlled trimming can help nearby proteins mature or become ready to work.
Because it is anchored in the cell membrane, TMPRSS5 works where cells meet their surroundings. That position helps shape local protein activity and signaling just outside the cell.
TMPRSS5 gene function is most closely linked to the inner ear, especially cells involved in sensing sound. By helping proteins on or near these cells work properly, it supports the stable environment needed for hearing.
What is a variant?
Within a gene, a genetic variant is a small difference in the DNA sequence. Variants like these are common and are one reason people naturally differ in appearance, metabolism, and how their bodies respond to environmental influences. Many do not produce any noticeable effect and simply represent normal genetic variation. In some situations, though, a variant can more strongly change how a gene functions and may contribute to, or cause, a genetic condition.
Genetic variants
What if the gene does not work
TMPRSS5 gene variants can alter how much TMPRSS5 protein a cell makes or how well the protein folds, reaches the cell surface, and carries out its protein-cutting role. Milder variants may partly reduce stability or activity, while more severe variants can shorten the protein or stop it from working at all. These differences can lead to a spectrum of functional effects at the cellular level rather than one single outcome.
How variants are linked to conditions
Variants in the TMPRSS5 gene do not yet have a broadly confirmed link to a specific health condition, so information about how TMPRSS5 gene variants are linked to conditions is still developing. If you have a confirmed TMPRSS5-related diagnosis, your doctor or genetic counselor can explain what that result means for you and your family.
A variant is not necessarily a diagnosis
Genetic variants are common in the general population and are a usual part of human biology. Most do not have a direct effect on health and simply contribute to natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when several genes and environmental factors are involved. 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 risk related to the TMPRSS5 gene. For the hearing changes linked to harmful TMPRSS5 variants, risk is mainly shaped by the genetic change itself rather than lifestyle or everyday exposures.
Inheritance of TMPRSS5 variants
TMPRSS5 gene inheritance for the hearing condition linked to this gene is autosomal recessive. This means a person usually inherits one nonworking copy of the TMPRSS5 gene from each parent. Parents who each carry one variant typically do not have the condition themselves, 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 with two working copies of the gene. Because the TMPRSS5 gene is on an autosome, this pattern is the same for males and females.
What does my TMPRSS5 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific, well-established health condition for TMPRSS5. If you have a TMPRSS5 result and want to understand what it could mean for relatives, the meaning depends on the exact variant and why testing was done. A genetics professional can help put that result into the right family context.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the TMPRSS5 gene, TMPRSS5 genetic testing uses a blood or saliva sample to read the gene's DNA code in a lab. Results may come from a single-gene test or a broader panel and are usually reported as benign, uncertain, or more likely to affect health.
When should I consider getting a genetic test?
There is not yet a broadly established TMPRSS5-specific reason for genetic testing in routine care. Testing may still be considered as part of broader genetic testing based on your symptoms and family history, together with a doctor or genetic counselor.
A genetic result is only one part of your health story
Genetic results can provide useful insight, but how much they reveal depends on the condition and the kind of variant involved. Many other 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 provides context rather than certainty and is best considered alongside other parts of care. In other situations, a genetic result may offer a clear answer. In areas like 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. Small differences in DNA 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 medication works well for one person, seems less effective for another, or causes more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics is the area of medicine that examines how differences in genes affect the way people respond to medications. It studies gene drug patterns to help explain why the same treatment can work differently in different people. For many medicines, genes influence either how powerful a drug’s effects are or how the body handles it. This information can support treatment decisions that are both more informed and more individualized. More detail on this topic is available in the LearnHub.
Drugs influenced by the TMPRSS5 gene
When should I seek medical advice?
There isn't yet a broadly confirmed role for this gene in how people respond to medicines, so any questions about treatment, side effects, or drug interactions are best discussed with your doctor. Medical advice is especially helpful before major medication changes or if new symptoms begin after starting a medicine.