The KLHL3 gene helps kidney cells keep salt, potassium, and fluid levels in balance, which supports healthy blood pressure. If this gene does not work properly, the body may hold on to too much salt and develop high potassium levels, often causing a form of inherited high blood pressure called Gordon syndrome. Some people notice high blood pressure early in life, while blood tests may show elevated potassium. Understanding this gene can help clarify why these findings run in families.
What is a gene?
Genes are stretches of DNA that hold instructions your cells use to make molecules or manage processes in the body. Some genes carry the directions for producing proteins, which are the parts of cells that do much of the work. Other genes mainly regulate when certain processes happen, where they take place, and how strongly they occur. As a whole, genes affect how the body develops and functions, and they can influence how you respond to food, stress, or medications. To go further into this subject, you can find more in the LearnHub.
Overview
KLHL3Gene function
What if the gene works
The KLHL3 gene helps kidney cells control how much salt they keep and how they handle potassium. This supports normal blood pressure and fluid balance.
Risk
What if the gene does not work
Variants in the KLHL3 gene can cause Gordon syndrome, with high blood pressure, high potassium levels, and growth problems or short stature. Milder and more severe variants can affect when features appear and how the kidneys handle salt and potassium.
Treatment
What does that mean for your treatment
A pathogenic variant in the KLHL3 gene can make treatment choices more focused: blood pressure and high potassium often improve with low dose thiazide diuretics, and limiting salt intake may help. This response is well established and can guide long term management.
Conditions associated with KLHL3
Gene function
What if the gene works
Your kidneys rely on the KLHL3 gene to fine tune how your body handles salt and water. Inside kidney cells, it helps keep key signaling proteins at the right level. This steady control supports day to day fluid balance and healthy blood pressure.
The KLHL3 gene helps kidney cells mark selected proteins for breakdown when they are no longer needed. Its protein works with CUL3, a partner in the cell’s protein tagging system, to guide this cleanup.
One of its key jobs is keeping WNK1 and WNK4 proteins at the right level. This helps cell signals stay measured rather than drifting too high or too low.
In kidney tubule cells, KLHL3 supports the signals that set how much sodium and chloride are taken back into the blood. This is part of how the KLHL3 gene helps control blood pressure through salt handling.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These changes are common and are part of normal human diversity, such as differences in appearance, metabolism, or how the body responds to environmental influences. Many variants do not have any noticeable effect and simply reflect natural genetic variation. In some cases, 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
Variants in the KLHL3 gene can change the shape or stability of the KLHL3 protein, making it less able to bind its partner proteins and mark certain proteins that control salt balance for breakdown. In practical terms, this is how KLHL3 gene variants affect protein function inside kidney cells. Some variants only partly weaken this process, while more disruptive variants can reduce it much more. That difference can influence how early pseudohypoaldosteronism type 2 appears and how marked it becomes.
How variants are linked to conditions
Pathogenic variants in the KLHL3 gene cause pseudohypoaldosteronism type II, also called Gordon syndrome, a rare inherited condition linked to high potassium and often high blood pressure. In many people, KLHL3 gene variants linked to Gordon syndrome are found when blood tests show raised potassium or when hypertension appears at a young age. Symptoms and severity can vary, and some people are diagnosed only after family testing.
A variant is not necessarily a diagnosis
Genetic variants are a common, normal part of being human. Most do not directly affect health and simply reflect natural variation across people. For many genes, carrying 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, a single well-understood variant in a specific gene can be enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For KLHL3, risk is mainly driven by the specific gene change itself, and symptoms can range from mild to more noticeable depending on the variant. High salt intake can make blood pressure harder to control, and kidney function, dehydration, or medicines that raise potassium can worsen the tendency toward high potassium.
Inheritance of KLHL3 variants
KLHL3-related high blood pressure with high potassium can be inherited in more than one way, so KLHL3 inheritance depends on the specific variant. Some KLHL3 gene variants follow an autosomal dominant pattern, which means one changed copy can be enough and each child of an affected parent has a 50% chance of inheriting it. Other variants follow an autosomal recessive pattern, which means a child needs to inherit two changed copies, one from each parent. When both parents carry a recessive KLHL3 gene variant, each pregnancy has a 25% chance of resulting in an affected child.
What does my KLHL3 result mean for my family?
Changes in the KLHL3 gene can run in families, and what this means for relatives depends on the specific change because KLHL3 is linked to both a dominant and a recessive form of a salt-balance condition that can cause high blood pressure and high potassium. In some families, a parent, child, brother, or sister may also carry the same change and could consider testing. In other families, parents may be healthy carriers, and brothers or sisters could also be carriers or be affected.
Genetic information
Genetic testing
How you find out about variants
Testing for variants in the KLHL3 gene usually uses a blood or saliva sample. KLHL3 genetic testing for inherited high blood pressure can read the gene’s DNA code and look for variants linked to a family pattern of high blood pressure and high potassium. Results may show a harmful variant, a harmless variant, or one whose meaning is still unclear.
When should I consider getting a genetic test?
Consider KLHL3 genetic testing if you or a close relative have high blood pressure along with high potassium levels, especially when this starts in childhood or early adulthood. Testing can help confirm an inherited cause called Gordon syndrome and may show whether other family members could also be affected.
A genetic result is only one part of your health story
A genetic result can be informative, but how much it reveals 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 such as medication response, these 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. This helps explain why the same treatment works well for one person, works less well for another, or causes more side effects in someone else. Small differences in genes can change how the body absorbs, breaks down, transports, or responds to a drug, and these differences are common.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect a person’s response to medications. It looks at connections between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes influence how strong a drug’s effects are or how the body processes it. This information can support more informed and individualized treatment decisions. You can read more about this topic in the LearnHub.
Drugs influenced by the KLHL3 gene
When should I seek medical advice?
There is not yet a well-established role for this gene in predicting how medicines will work, so questions about side effects, medication changes, or how well treatment is working are best discussed with your doctor.
History
KLHL3 entered medical genetics more recently than many well-known disease genes. In 2012, researchers identified variants in the KLHL3 gene as a cause of a rare inherited form of high blood pressure with high potassium, helping explain cases that had puzzled doctors for years. Initially understood only through visible traits, later recognized as tied to a specific gene, this condition became clearer as family studies and modern DNA sequencing advanced. Building on this early work, scientists linked KLHL3 to the same biological pathway as other genes involved in salt handling and blood pressure control. These findings helped place KLHL3 within the broader history of inherited hypertension research.