The NDUFV3 gene helps make part of complex I, an energy-making system inside mitochondria, the parts of cells that act like power centers. This gene helps your body power tissues that need steady energy, especially the brain, muscles, and heart. If it does not work properly, cells may struggle to make enough energy, which can lead to a mitochondrial condition. Depending on the variant, people may have developmental delay, low muscle tone, movement problems, seizures, or other neurologic symptoms.
What is a gene?
Genes are sections of DNA that provide your cells with instructions for making molecules or directing processes in the body. Some genes hold the information needed to produce proteins, the parts of cells that do much of the work. Other genes mainly regulate when certain processes occur, where they take place, and how strongly they operate. Together, genes affect how the body develops and functions, 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
NDUFV3Gene function
What if the gene works
The NDUFV3 gene helps build complex I, a part of mitochondria that turns food into cell energy. This supports energy production and helps many tissues, especially the brain and muscles, meet daily energy needs.
Risk
What if the gene does not work
More disruptive variants in the NDUFV3 gene can reduce mitochondrial energy production and cause a rare mitochondrial disease, often affecting the brain, muscles, and eyes. Effects can range from milder vision problems to earlier, more severe developmental and neurologic symptoms.
Treatment
What does that mean for your treatment
No NDUFV3-specific treatment or management approach is currently established for people with a pathogenic or loss-of-function variant in the NDUFV3 gene.
Gene function
What if the gene works
Your cells need a steady supply of usable energy to power muscles, nerves, and other everyday body functions. The NDUFV3 gene helps a key mitochondrial machine do this work. Inside mitochondria, the cell's energy centers, it supports early steps in energy production by helping move electrons and build the force used to make ATP.
Its protein is part of complex I, the first major step in the cell's energy chain. It helps pass electrons from NADH to coenzyme Q, which keeps mitochondrial energy production moving.
As complex I works, it helps move hydrogen ions across the membrane inside mitochondria. This creates a charge difference that your cells use to make ATP, the main energy-carrying molecule.
The NDUFV3 gene provides one of the helper pieces of complex I. This support helps the larger energy-making complex stay organized and carry out its normal job during everyday cell activity.
What is a variant?
A genetic variant is a slight change in the DNA sequence within a gene. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, or the way the body reacts to environmental influences. Many variants do not cause any noticeable effect and are simply part of natural genetic variation. Sometimes, though, a variant changes how a gene works more significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
How variants in the NDUFV3 gene affect mitochondrial complex I depends on whether the change alters the protein's shape or stability, making it harder for this part of the cell's energy system to assemble or work normally. Some variants leave partial activity, while more disruptive variants can sharply reduce complex I function and cell energy production. When the functional loss is greater, mitochondrial disease linked to the NDUFV3 gene may start earlier and involve more pronounced features.
How variants are linked to conditions
Research on the NDUFV3 gene variants and health conditions is still developing, and this gene does not yet have a broadly confirmed link to one specific medical condition across routine clinical genetics. Anyone with a confirmed NDUFV3-related finding should use their own doctor’s or genetic counselor’s advice to understand what that result may mean for their health.
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 simply reflect natural human variation. In many genes, a variant associated with a condition points to a possible link rather than a confirmed diagnosis, particularly when several genes and environmental influences play a role. In other situations, one well characterized variant in a particular gene may be 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 NDUFV3 gene. For families with a known NDUFV3 change, overall risk is mainly shaped by the genetic change itself rather than day-to-day lifestyle factors.
Inheritance of NDUFV3 variants
NDUFV3-related conditions are inherited in an autosomal recessive pattern, which explains how NDUFV3 variants are inherited in families. This means a person usually develops the condition only if they inherit two disease-causing variants in the NDUFV3 gene, one from each parent. Parents who each carry one variant are often unaffected carriers. With each pregnancy, two carrier parents 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 without either variant.
What does my NDUFV3 result mean for my family?
Changes in the NDUFV3 gene linked to disease are passed down in a recessive pattern, which means close relatives may also be carriers even if they are healthy. Brothers and sisters could have the same condition or be carriers, and other blood relatives may also carry the family variant. For family members, the main question is often whether they carry the same gene change and whether that could matter for future children.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the NDUFV3 gene, NDUFV3 genetic testing analyzes DNA from a blood sample, cheek swab, or saliva. It may be done as a single-gene test or as part of a broader panel, exome, or genome test, and results can identify a disease-causing variant, a benign variant, or an uncertain finding.
When should I consider getting a genetic test?
Genetic testing for the NDUFV3 gene may be considered when someone has signs of a rare inherited condition that affects how cells make energy, such as early developmental problems, muscle weakness, seizures, or high lactic acid levels, especially if there is a family history. It can also help clarify the cause when doctors suspect a mitochondrial condition.
A genetic result is only one part of your health story
A genetic result can provide meaningful insight, but how much it reveals varies based on the condition and the type of variant involved. Many factors, including lifestyle, environment, age, and medical history, influence how the body functions over time. For some conditions, especially those shaped 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 can offer a clear answer. In areas such as medication response, genetic results can 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, has less effect in another, or causes more side effects in someone else. Part of the reason is that inherited differences can change how the body breaks down, moves, or responds to a drug, and these differences are common.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It focuses on links between genes and drugs to help explain why the same treatment can work differently from one person to another. For many medicines, genes influence how strongly a drug works or how the body handles it. This information can support more informed, individualized treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the NDUFV3 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choice or response. If you have side effects, unusual reactions, or questions about any medicine or your overall health, discuss them with your doctor.