The DOHH gene helps activate a cell protein called eIF5A, which supports normal protein production, growth, and brain development. The protein made by this gene helps your cells complete the final step that switches eIF5A on. When both copies of the DOHH gene do not work properly, a child may develop a rare inherited condition linked to developmental delay, low muscle tone, feeding problems, seizures, and smaller head size.
What is a gene?
Genes are sections of DNA that carry information your cells use to make molecules or regulate processes in the body. Some genes carry the instructions needed to make proteins, which are the working parts of cells. Others mainly control when certain processes happen, where they occur, and how strongly they run. Taken together, genes influence how the body develops and works, and they can affect how you respond to food, stress, or medications. For a more detailed look at this topic, you can find more in the LearnHub.
Overview
DOHHGene function
What if the gene works
The DOHH gene helps activate eIF5A, a protein your cells need to make certain other proteins. This supports normal cell growth, division, and development.
Risk
What if the gene does not work
Variants in both copies of the DOHH gene can cause a neurodevelopmental condition with developmental delay, intellectual disability, and sometimes seizures. Milder or more severe variants may change which features appear, how early they start, and how pronounced they are.
Treatment
What does that mean for your treatment
No DOHH-specific treatment or management approach is currently established for people with a pathogenic or loss-of-function variant in the DOHH gene. DOHH is being studied as part of the hypusination pathway as a possible drug target in cancer and some infections, but this has not led to guideline-based treatment for DOHH-related conditions.
Conditions associated with DOHH
Gene function
What if the gene works
Your cells use the DOHH gene to finish activating a helper protein called EIF5A, which supports protein production. This final step helps cells make certain proteins more smoothly during everyday growth and upkeep. Understanding the DOHH gene function helps show how cells keep routine work on track.
The DOHH gene completes the last step needed to switch EIF5A fully on. It changes deoxyhypusine into hypusine, a small chemical tag that lets EIF5A do its job.
Active EIF5A helps ribosomes (the cell's protein-making machines) move through harder stretches of protein instructions. This supports smoother protein production in many kinds of cells.
By supporting EIF5A, the DOHH gene helps cells grow, divide, and renew themselves in a steady way. This matters for normal day to day maintenance across the body.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These differences are common and are part of normal human diversity, including variation in appearance, metabolism, and how the body responds to environmental influences. Many have no noticeable effect and simply represent natural genetic variation. Sometimes, however, a variant changes how a gene functions more substantially and can contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Changes in the DOHH gene can alter the enzyme’s shape, make it less stable, or weaken its iron binding, so a key chemical step on a cell protein called EIF5A is done poorly or not at all. In this way, DOHH gene variants affect function across a spectrum: some missense variants leave partial activity, while more disruptive variants can sharply reduce protein production or stop the enzyme from working. Greater loss of activity may lead to more widespread cellular effects.
How variants are linked to conditions
Pathogenic variants in both copies of the DOHH gene cause a rare inherited neurodevelopmental condition with developmental delay. People with this diagnosis may have intellectual disability, low muscle tone, seizures, short stature, and feeding or growth problems. A confirmed result can help explain the condition rather than simply point to a higher risk.
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 instead represent natural variation between people. For many genes, having a variant associated with a condition points to a possible link, not a certain diagnosis, particularly when several genes and environmental influences also play a role. In contrast, there are situations in which one well-characterized variant in a particular gene is enough to confirm the 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 DOHH gene. People with concerns about their personal or family risk can talk with a doctor or genetic counselor.
Inheritance of DOHH variants
DOHH gene inheritance is autosomal recessive for the well-established condition linked to this gene. This means a child usually inherits one altered copy of the DOHH gene from each parent. Parents who each carry one variant are often unaffected themselves, but with each pregnancy there is 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 variant. Sons and daughters are affected equally.
What does my DOHH result mean for my family?
Changes in the DOHH gene linked to disease are passed down in a recessive pattern, which usually means parents are healthy carriers. For family members, this can mean brothers and sisters may also be affected or may be carriers, and close relatives may want to learn whether the variant runs in the family. Children of someone with a DOHH-related condition are usually carriers unless the other parent also carries a changed DOHH gene.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for DOHH variants usually uses a blood or saliva sample, then reads the DNA sequence to look for changes in the DOHH gene. This can show whether you carry a variant already seen in your family or help explain a suspected genetic condition when DOHH testing is included on a larger gene panel.
When should I consider getting a genetic test?
Genetic testing for the DOHH gene may be considered when a child has unexplained developmental delay, seizures, low muscle tone, or movement problems, especially if these start early in life. It may also be helpful if more than one family member has similar symptoms.
A genetic result is only one part of your health story
Genetic findings can be informative, but their value depends on the condition in question and on the kind of variant identified. Over time, the body is shaped by many factors, including lifestyle, environment, age, and medical history. For some conditions, particularly those linked to many genes, genetic information offers context rather than certainty and makes the most sense when viewed together with other parts of care. In other situations, a genetic result can give a clear answer. In areas like medication response, these results can also help put personal experiences in context.
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 body, or responds to it at its target. This helps explain why the same treatment works well for one person, seems less effective 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 medicines. It focuses on the relationship between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medications, genes influence both how strongly a drug works and how the body handles it. This information can support treatment decisions that are more informed and more individualized. More on this topic is available in the LearnHub.
Drugs influenced by the DOHH gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting how people respond to medicines, so questions about side effects, treatment choices, or concerns when starting or changing a medication are best discussed with your doctor.