The USP39 gene helps cells edit RNA, the working copy of genetic instructions, so proteins can be made correctly. This gene plays an important role in cell division and in keeping normal cell growth on track. If it does not work properly, cells may process those instructions the wrong way, which can disrupt growth, repair, and how tissues function.
What is a gene?
Genes are stretches of DNA that carry instructions your cells use to make molecules or regulate activities in the body. Some genes give the directions for producing proteins, which do much of the work inside cells. Other genes mostly control when certain processes happen, where they happen, and how strongly they are carried out. Taken together, genes affect how the body grows and works, and they can shape how you respond to food, stress, and medications. For a more detailed look at this topic, you can learn more in the LearnHub.
Overview
USP39Gene function
What if the gene works
The USP39 gene helps cells process RNA, the message used to make proteins, and supports normal cell division. This helps tissues grow and renew in an orderly way.
Risk
What if the gene does not work
Variants in the USP39 gene are linked to inherited retinal disease, often causing night blindness and progressive vision loss. Milder and more severe variants can change how early this starts and how much vision is affected.
Treatment
What does that mean for your treatment
No USP39-specific treatment or management approach is currently established for pathogenic variants in the USP39 gene. Researchers are studying the USP39 gene in cancer as a possible biomarker and drug target, but this has not yet changed routine care.
Gene function
What if the gene works
Your cells constantly turn genetic instructions into working messages. USP39 gene function centers on RNA splicing, a step that trims and joins RNA so cells can read it properly. When the USP39 gene is working as expected, many cells can make well formed messages for protein production and routine growth.
The USP39 gene helps cells trim RNA, the working copy of genetic instructions, after it is made from DNA. This removes extra sections and joins the useful parts into a clear message for protein building.
Its protein works as part of the spliceosome, the cell system that carries out RNA splicing. By helping this system assemble and run smoothly, it supports reliable message processing.
The USP39 gene helps turn early RNA copies into mature messages that are ready for the cell to read. That supports steady protein production across many tissues.
What is a variant?
A genetic variant is a small change in the DNA sequence within a gene. These changes are common and help account for normal human diversity, including differences in appearance, metabolism, or how 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 functions more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Changes in the USP39 gene can weaken RNA splicing (the cell’s editing step that turns raw genetic messages into usable instructions). Some variants make the USP39 protein unstable or shorten it, so less of it reaches the cell’s splicing machinery, while others more subtly change how it interacts with partner proteins. This helps explain how variants influence the USP39 gene’s function: milder variants may partly reduce activity, while more severe variants can leave little or no working protein.
How variants are linked to conditions
The USP39 gene does not yet have a broadly confirmed link to a specific health condition, although research on health conditions linked to USP39 gene variants is still developing. If you have a confirmed variant in the USP39 gene, your doctor or genetic counselor can explain what it 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 widely seen in the general population. Most do not directly affect health and instead represent natural human diversity. For many genes, having a variant associated with a condition indicates a possible link rather than a certain diagnosis, especially when several genes and environmental factors play a role. In some situations, 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 USP39 gene. If a change in USP39 has been found in you or your family, a doctor or genetic counselor can help explain what that result may mean for your personal risk.
Inheritance of USP39 variants
For people looking into the USP39 gene inheritance pattern, the best-established finding is autosomal recessive inheritance for USP39-related retinal disease. This means a person usually inherits one altered copy of the USP39 gene from each parent. Parents who each carry one variant are often unaffected themselves, but with each pregnancy they have a 25% chance of having a child with the condition, a 50% chance of having a child who is a carrier, and a 25% chance of having a child who inherits neither familial variant. Because USP39 is on chromosome 19, this inheritance pattern is the same for males and females.
What does my USP39 result mean for my family?
For USP39, family implications are usually discussed in the context of an inherited eye condition passed down in a recessive way. This often means parents are healthy carriers, brothers and sisters may also be carriers or may have the condition, and other close relatives could carry the same gene change without knowing it. Children of someone with a USP39-related condition usually inherit one changed copy and are carriers unless the other parent also carries a USP39 change.
Genetic information
Genetic testing
How you find out about variants
USP39 genetic testing usually uses a blood or saliva sample to read the DNA sequence of the USP39 gene and look for variants. It may be included in a targeted gene panel, exome test, or genome test, and results can show whether a variant is present and how it is classified.
When should I consider getting a genetic test?
There is not yet a broadly established, USP39-specific reason for routine genetic testing. Decisions about testing are usually based on your personal health history, family history, and the reason testing is being considered, ideally with a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic result can be very informative, but how much it reveals depends on the condition and the specific type of variant. How the body functions over time is shaped by many factors, including lifestyle, environment, age, and medical history. In some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is most useful when viewed together with other parts of care. In other situations, a genetic result may give 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 body, or responds to it at the target tissue. This helps explain why the same treatment works well for one person, feels too strong for another, or brings more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It studies gene and drug patterns to help explain why the same treatment can work differently from one person to another. For many drugs, genes influence either how strongly a medicine works or how the body processes it. This information can support more informed, more personalized treatment decisions. To explore this subject in greater detail, you can learn more in the LearnHub.
Drugs influenced by the USP39 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, so general questions about symptoms, treatments, or side effects are best discussed with your doctor. Research on the USP39 gene is mainly focused on how it may affect cell growth in some cancers, rather than on clear, proven drug-response guidance used in routine care.