Your cells use the NUBPL gene to assemble complex I, a key part of the mitochondria, the energy centers that help make the body’s fuel. If the NUBPL gene does not work properly, cells may struggle to produce enough energy, especially in the brain and muscles. Pathogenic variants in the NUBPL gene are linked to a rare mitochondrial condition that can lead to developmental delay, low muscle tone, balance or movement problems, and sometimes seizures.
What is a gene?
Genes are sections of DNA that carry instructions your cells use to make molecules or regulate processes in the body. Some genes hold the directions for making proteins, the functional parts of cells. Others mainly help control when certain processes occur, where they take place, and how strongly they run. Together, genes affect how the body develops and works, and they can also shape how you respond to food, stress, or medications. To explore this topic in more detail, you can find more in the LearnHub.
Overview
NUBPLGene function
What if the gene works
The NUBPL gene helps build complex I, a key part of the mitochondria, your cells’ energy makers. This supports normal energy production, especially in tissues with high energy needs like the brain and muscles.
Risk
What if the gene does not work
Variants in the NUBPL gene may cause a condition that affects energy production, with delayed development, balance or movement problems, and sometimes seizures. Milder and more severe variants can influence when symptoms begin and how noticeable they are.
Treatment
What does that mean for your treatment
For a pathogenic or loss-of-function variant in the NUBPL gene, no NUBPL-specific treatment or drug-choice approach is currently established in clinical guidelines. Treatment is based on the person’s symptoms and overall mitochondrial care, rather than a medicine selected specifically for the NUBPL gene.
Conditions associated with NUBPL
Gene function
What if the gene works
Your cells need steady mitochondrial energy to power muscles, nerves, and other organs throughout the day. In your cells, the NUBPL gene helps assemble an important part of the mitochondria’s energy making system. This background helps explain how the NUBPL gene helps mitochondria make energy in a steady, controlled way.
The NUBPL gene helps your cells put together complex I, the first major step in the mitochondria’s energy chain. This helps the system get ready to pass electrons, small charged particles that help release energy from food.
Its protein helps place iron-sulfur clusters, tiny iron-containing parts used for electron movement, into complex I as it matures. This helps the finished complex become stable and ready for normal energy production.
By helping complex I mature, the NUBPL gene supports the controlled flow of electrons through mitochondria. That flow helps cells turn energy from food into ATP, the main fuel cells use for routine work.
What is a variant?
A genetic variant is a small difference in the DNA sequence within a gene. These differences are common and help shape normal human diversity, including variation in appearance, metabolism, and how the body responds to environmental influences. Many have no noticeable effect and are simply part of natural genetic variation. Sometimes, though, a variant changes how a gene works more substantially and can contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the NUBPL gene can lower the amount of working protein, make it unstable, or stop it from helping build complex I, a key part of the cell’s energy system. This is how NUBPL gene variants affect mitochondrial energy production. Milder variants may leave some activity, while more severe variants can cause a larger loss of function and are often linked to earlier or more noticeable features of mitochondrial complex I deficiency.
How variants are linked to conditions
Pathogenic variants in the NUBPL gene cause mitochondrial complex I deficiency, a rare inherited mitochondrial disease. People with this condition often have developmental delay, problems with balance or coordination, movement changes, and characteristic brain MRI findings. In practice, discussions of NUBPL gene variants linked to mitochondrial disease mainly refer to this diagnosis.
A variant is not necessarily a diagnosis
Genetic variants are common in the general population and are a normal feature of human biology. Most do not have a direct effect on health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition indicates a possible link rather than a definite diagnosis, especially when more than one gene and environmental factors are involved. In some situations, though, a single well-characterized variant in a specific gene can be enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For NUBPL, risk is mainly shaped by family genetics rather than lifestyle. A child is affected when both parents pass on a changed copy of the NUBPL gene, so risk is higher in families with known carriers or where blood relatives have children together; there is not broadly confirmed evidence that diet, exercise, or other everyday factors change this genetic risk.
Inheritance of NUBPL variants
NUBPL gene variants linked to NUBPL-related mitochondrial disease are inherited in an autosomal recessive pattern. This means a child usually inherits one altered copy of the NUBPL gene from each parent. When both parents carry one variant, each pregnancy has a 25% chance of the child inheriting both variants and being affected, a 50% chance of being a carrier, and a 25% chance of inheriting neither variant. In practical terms, how NUBPL gene variants are inherited usually involves healthy carrier parents passing the condition on together.
What does my NUBPL result mean for my family?
For families with a disease-causing change in the NUBPL gene, the usual pattern is recessive, which means close relatives may also be carriers even if they feel completely well. Brothers and sisters of an affected child may have the same condition or be carriers, and other blood relatives may also carry the gene change. Family implications depend on the exact result found in your family.
Genetic information
Genetic testing
How you find out about variants
Variants in the NUBPL gene are usually found with genetic testing on a blood sample, saliva, or a cheek swab. NUBPL genetic testing reads the gene’s DNA code to look for changes that may explain symptoms or confirm a diagnosis of a mitochondrial condition. Results are interpreted alongside a person’s health history and, when needed, family testing.
When should I consider getting a genetic test?
Consider genetic testing for the NUBPL gene if a child or adult has signs of a mitochondrial condition, such as developmental delay, trouble with balance or movement, muscle weakness, or brain scan findings that suggest a problem with the body's energy-making system. Testing may also help when a close family member has a confirmed NUBPL change.
A genetic result is only one part of your health story
A genetic result can provide useful insight, but how much it reveals depends on the condition and the kind of variant involved. Over time, many factors, including lifestyle, environment, age, and medical history, influence how the body functions. For some conditions, especially those affected by many genes, genetic information offers context rather than certainty and is best considered alongside other parts of care. In other situations, a genetic result may give a clear answer. In areas like medication response, genetic 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, has less effect in another, or causes more side effects in someone else. 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, and this kind of variation is common.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in a person’s genes can shape their response to medications. It studies gene-drug patterns to better explain why the same treatment may work differently in different people. For many medicines, genes help influence how strongly a drug works or how the body handles it. This information can support treatment decisions that are both more informed and more individualized. You can read more about this topic in the LearnHub.
Drugs influenced by the NUBPL gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choice or response, so questions about medicines, side effects, or your overall health are best discussed with your doctor.
History
The NUBPL gene entered the medical literature in the 2000s, when researchers studying energy related conditions identified it as an important inherited factor. Initially understood only through visible traits, later recognized as tied to a specific gene, its role became clearer as genetic testing improved. Building on this early work, scientists linked changes in the NUBPL gene to a rare mitochondrial condition involving complex I deficiency. As more families were studied, reports helped connect similar patterns of symptoms across different countries. Over time, descriptions became more precise, and the NUBPL gene moved from being a little known research finding to a recognized cause of a rare inherited condition.