The NDUFV2 gene helps cells make energy inside mitochondria, the parts of cells that power your body. The protein made by this gene helps your cells run complex I, an early step in turning food into usable energy. If the gene is not working well, some people develop a mitochondrial condition with low muscle tone, developmental delay, seizures, movement problems, or heart problems. Effects can vary from person to person, depending on the variant.
What is a gene?
Genes are sections of DNA that carry instructions your cells use to make molecules or regulate activities in the body. Some genes provide the code for proteins, which are the working parts of cells. Others mainly direct when certain processes happen, where they happen, and how strongly they run. Taken together, genes influence how the body develops and works, and they can shape how you respond to food, stress, or medications. More on this topic is available in the LearnHub.
Overview
NDUFV2Gene function
What if the gene works
The NDUFV2 gene helps mitochondria, your cells’ energy makers, produce energy. Its protein is part of complex I, an early step in the process cells use to turn food into usable fuel.
Risk
What if the gene does not work
Variants in the NDUFV2 gene can reduce mitochondrial energy production and may cause complex I deficiency, often affecting the brain, muscles, or heart. Milder to more severe variants can influence when problems begin and how the condition affects the body.
Treatment
What does that mean for your treatment
No NDUFV2-specific treatment or drug-selection approach is currently established; care for conditions linked to pathogenic variants in the NDUFV2 gene is based on the person’s symptoms and standard management of mitochondrial disease.
Conditions associated with NDUFV2
Gene function
What if the gene works
Your cells need a steady power supply for routine tasks like movement, thinking, and repair. The NDUFV2 gene helps mitochondria, the parts of cells that make most of this energy, carry out an early step in that process. When it is working as expected, cells can move fuel-derived electrons in a controlled way and support normal ATP production.
The NDUFV2 gene is part of complex I, the first large protein team in the cell’s energy chain. It helps start the process that turns energy from food into ATP, the cell’s usable energy.
Its protein helps pass electrons along inside complex I. This controlled handoff is a key part of how the NDUFV2 gene helps mitochondria make energy for the body.
By supporting electron flow in complex I, NDUFV2 helps the system move charged particles across the inner mitochondrial membrane. This creates stored energy that cells use to make ATP.
Complex I also helps convert NADH back to NAD+, a form cells need to keep processing nutrients. NDUFV2 supports this recycling as part of the same energy pathway.
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, including differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not have any noticeable effect and simply represent 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 NDUFV2 gene can make the protein unstable, change its shape, or weaken its fit within mitochondrial complex I, lowering electron transfer and cell energy output. Milder variants may preserve some activity, while more severe variants can sharply reduce or nearly abolish complex I function. This range helps explain how variants in the NDUFV2 gene affect mitochondrial complex I. With two severe variants, mitochondrial disease often starts earlier and is more pronounced.
How variants are linked to conditions
Variants in the NDUFV2 gene are most clearly linked to mitochondrial complex I deficiency, a rare inherited condition that can affect the brain, muscles, and heart. In some people, pathogenic NDUFV2 gene variants cause Leigh syndrome or a related mitochondrial disease, often with developmental delay, low muscle tone, seizures, or cardiomyopathy. Reports have also described NDUFV2-related heart muscle disease in some families.
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 have a direct effect on health and instead represent normal human variation. For many genes, having a variant associated with a condition suggests a possible link rather than a certain diagnosis, especially when several genes and environmental influences 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 NDUFV2 gene. If a harmful change in NDUFV2 is present, the main risk usually comes from the genetic change itself, and a doctor or genetic counselor can explain what that may mean for you or your family.
Inheritance of NDUFV2 variants
NDUFV2-related conditions are inherited in an autosomal recessive pattern. In practical terms, how NDUFV2 variants are inherited usually means a child receives one altered copy of the NDUFV2 gene from each parent. Parents who each carry one variant are often unaffected, and with each pregnancy there is a 25% chance the child inherits both altered copies, a 50% chance the child is a carrier, and a 25% chance the child inherits neither variant. This pattern applies equally to males and females.
What does my NDUFV2 result mean for my family?
For families of someone with an NDUFV2-related condition, the usual pattern is recessive, which means parents are often healthy carriers and brothers or sisters may also be affected or be carriers. Other close relatives on both sides of the family may carry the same gene change without knowing it. What this means for relatives depends on the exact result and the condition linked to it.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for variants in the NDUFV2 gene usually uses a blood or saliva sample. A lab reads the DNA in the NDUFV2 gene, sometimes in a broader test that checks many genes at once, to look for changes that may help explain symptoms or show whether a family variant is present.
When should I consider getting a genetic test?
Consider genetic testing for the NDUFV2 gene if you or your child has signs of a condition that affects how the body makes energy, especially early severe developmental delay, seizures, weak muscle tone, high lactic acid levels, or unexplained heart muscle disease. Testing can also help if these problems run in the family or a relative has a known NDUFV2 variant.
A genetic result is only one part of your health story
Genetic results can provide useful insight, but how much they can tell you depends on the condition and the specific type of variant involved. The way the body functions over time is also shaped by many factors, including lifestyle, environment, age, and medical history. For some conditions, especially those influenced by many genes, genetic information provides context rather than certainty and is best considered along with other parts of care. In other situations, a genetic result may offer a clear answer. In areas like medication response, genetic results can also help put individual experiences in perspective.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body responds to medicines. This helps explain why the same treatment may work well for one person, seem weaker in another, or cause more side effects in someone else. These differences are common and often relate to how the body breaks down, transports, or responds to a drug, which can influence both benefit and sensitivity.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It studies the relationships between genes and drugs to better explain why the same treatment can work differently from one person to another. For many medications, genes influence how strongly a drug works or how the body handles it. This information can help support treatment decisions that are more informed and more individualized. More about this topic is available in the LearnHub.
Drugs influenced by the NDUFV2 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication decisions, so questions about side effects, medicine changes, or ongoing symptoms are best discussed with your doctor. Seek medical advice if a new medicine causes problems, your treatment is not working as expected, or you are worried about how your medicines may affect you.