The ATP13A3 gene helps cells move small charged molecules called polyamines, which support cell growth and survival, especially in the lining of blood vessels. This gene plays an important role in keeping lung blood vessels working normally. When ATP13A3 is not working well, some people develop pulmonary arterial hypertension, where the arteries in the lungs become narrowed and pressure rises. This can lead to shortness of breath, tiredness, chest discomfort, or fainting, and some gene changes are linked to earlier and more severe disease.
What is a gene?
A gene is a section of DNA that carries instructions your cells use to make molecules or regulate processes in the body. Some genes contain the directions for making proteins, the parts of cells that do the work. Other genes mainly help determine when certain processes happen, where they happen, and how strongly they occur. Together, genes influence how the body develops and functions, and they can affect how you respond to food, stress, or medications. For a deeper look at this topic, you can find more in the LearnHub.
Overview
ATP13A3Gene function
What if the gene works
The ATP13A3 gene helps cells move polyamines, small molecules that support normal growth and survival. This is especially important in blood vessel cells, including those in the lungs.
Risk
What if the gene does not work
Variants in the ATP13A3 gene are linked to pulmonary arterial hypertension, with high pressure in the lung arteries. Milder variants may raise risk later in life, while more severe or two-copy variants can cause earlier, more severe disease.
Treatment
What does that mean for your treatment
No treatment or drug choice is currently tailored specifically to pathogenic variants in the ATP13A3 gene in clinical guidelines. The ATP13A3 gene is being studied in pulmonary arterial hypertension as a possible future treatment target, but this has not yet changed routine care.
Conditions associated with ATP13A3
Gene function
What if the gene works
Your cells need a steady supply of polyamines, small molecules that support growth and everyday cell work. The ATP13A3 gene helps manage how these molecules move inside the cell. Understanding how the ATP13A3 gene works in your cells makes it easier to see how cells stay balanced over time.
The ATP13A3 gene uses energy from ATP, the cell’s fuel, to move polyamines, small molecules your cells use every day. This helps cells shift these molecules out of internal sorting compartments and into the right place.
By controlling where polyamines go, this gene helps keep their levels steady inside cells. That balance supports routine work such as growth, protein production, and renewal of cell parts.
Its protein works in endosomes and lysosomes (small compartments that sort and recycle material inside cells). This helps those compartments process polyamines in a controlled way and keeps cellular traffic moving smoothly.
What is a variant?
A genetic variant is a minor change in a gene’s DNA sequence. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, and the way the body responds to environmental influences. Many variants do not cause any noticeable effect and are part of natural genetic variation. Sometimes, though, a variant changes how a gene works more significantly and can contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the ATP13A3 gene can alter the ATP13A3 protein’s shape, stability, or usual location inside the cell, which may weaken its ability to move polyamines (small molecules cells use for growth and survival). Some ATP13A3 gene variants leave partial activity, while more severe variants can greatly reduce or eliminate the protein. In pulmonary arterial hypertension, stronger loss of function is often linked to earlier onset and a more severe course.
How variants are linked to conditions
Pathogenic variants in the ATP13A3 gene can cause pulmonary arterial hypertension, including heritable pulmonary arterial hypertension and some cases that begin in childhood. This means the gene change is linked to high blood pressure in the lungs rather than being only a small risk factor. The age when symptoms start and how severe they become can vary. People carrying two disease-causing variants may develop an earlier-onset form.
A variant is not necessarily a diagnosis
Genetic variants are common across the general population and are a usual part of human biology. Most do not directly affect health and simply contribute to normal human diversity. 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. In some situations, though, one well-studied variant in a particular 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 ATP13A3 gene. For many living with an ATP13A3 change, risk can vary by the exact variant and family history, and anyone concerned about personal risk should speak with a doctor or genetic counselor.
Inheritance of ATP13A3 variants
For families asking how ATP13A3 gene variants are inherited, the pattern can differ by the specific condition and variant type involved. Changes in the ATP13A3 gene linked to pulmonary arterial hypertension are most often inherited in an autosomal dominant way, so a parent carrying the variant can pass it to a child with a 50% chance, and some cases happen as a new variant for the first time in the child. More rarely, severe early onset disease has been reported when a person inherits ATP13A3 gene variants from both parents, which follows an autosomal recessive pattern.
What does my ATP13A3 result mean for my family?
ATP13A3 results can have different meanings for family members, depending on the exact change found. Some ATP13A3 changes are linked to an inherited form of pulmonary high blood pressure that can run in families, so close relatives may also carry the same change. Other ATP13A3 changes are only a concern when both copies of the gene are affected, which can mean relatives are healthy carriers.
Genetic information
Genetic testing
How you find out about variants
Testing for ATP13A3 variants usually uses a blood or saliva sample. In ATP13A3 genetic testing for pulmonary arterial hypertension, a lab reads the DNA code in the ATP13A3 gene and checks for variants that may help explain the condition, confirm a genetic diagnosis, or clarify whether relatives could benefit from targeted family testing.
When should I consider getting a genetic test?
Consider ATP13A3 testing if you or close relatives have high blood pressure in the lungs, called pulmonary arterial hypertension, especially if it started young, runs in the family, or has no clear cause. It can help confirm whether this gene is involved and may clarify testing for relatives.
A genetic result is only one part of your health story
Genetic test results can offer useful insight, but how much they reveal depends on the condition and the type of variant involved. Over time, how the body functions is shaped by many other factors, including lifestyle, environment, age, and medical history. In some conditions, especially those influenced by many genes, genetic information provides context rather than certainty and is best understood 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 perspective.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body responds to medicines. Some people break down a drug more quickly, while others process it more slowly or are more sensitive to its effects. This helps explain why the same medication may work well for one person, have less effect in another, or be more likely to cause side effects.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can affect a person’s response to medicines. It studies the relationship between genes and medications to help explain why the same treatment may work differently from one person to another. For many drugs, genes can influence how strongly a medicine works or how the body handles it. This understanding can support more informed, more individualized treatment decisions. To learn more about this topic, you can explore the LearnHub.
Drugs influenced by the ATP13A3 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 how well they work, so questions about treatment, side effects, or new symptoms are best discussed with your doctor.
History
ATP13A3 entered the medical literature as part of broader efforts to map and classify ATPase genes in the early 2000s. At first, it was mainly a laboratory finding with no clear place in everyday medicine. In recent decades, awareness of this gene’s role has grown as large DNA sequencing studies connected ATP13A3 to pulmonary arterial hypertension, a condition affecting blood vessels in the lungs. From these first observations, research expanded steadily. Reports then described families and individual patients carrying rare ATP13A3 variants, which helped confirm that the gene was clinically relevant. More recent work has continued to refine which variants are most likely to matter and how ATP13A3 fits into the growing picture of inherited lung vessel disease.