The DLAT gene gives instructions for part of a cell system that turns food, especially sugars, into usable energy. This gene helps your body keep energy flowing to organs with high needs, including the brain, muscles, and heart. If the gene does not work properly, cells may struggle to make enough energy and lactic acid can build up, which may lead to low muscle tone, developmental delay, seizures, or other brain and nerve problems.
What is a gene?
Genes are sections of DNA that carry instructions your cells use to make molecules or direct processes in the body. Some genes hold the instructions for producing proteins, which are the working parts of cells. Other genes mainly help regulate when certain processes happen, where they take place, and how strongly they run. Taken together, genes affect how the body develops and functions, and they can also influence how you respond to food, stress, or medications. To explore this topic in more detail, you can find more information in the LearnHub.
Overview
DLATGene function
What if the gene works
The DLAT gene helps mitochondria, your cells’ energy centers, turn sugar breakdown products into usable energy. This supports a steady energy supply for organs with high needs, including the brain, muscles, and heart.
Risk
What if the gene does not work
Variants in the DLAT gene can impair cell energy production, causing lactic acidosis and neurologic problems such as low muscle tone, developmental delay, or seizures. Milder and more severe variants can affect when symptoms appear and how severe they are.
Treatment
What does that mean for your treatment
No DLAT-specific treatment or drug selection approach is currently established in clinical guidelines for pathogenic or loss-of-function variants in the DLAT gene. The DLAT gene is also being studied as a cell metabolism marker and possible drug target in cancer research, but this has not led to routine treatment decisions.
Conditions associated with DLAT
Gene function
What if the gene works
Your cells need the DLAT gene to help turn food into usable energy inside mitochondria, the parts of cells that make most of the body's energy. It works in an early step of energy production after sugar has been broken down. Understanding what the DLAT gene does in the body helps explain how cells keep a steady fuel supply.
DLAT helps convert pyruvate (a product of sugar breakdown) into acetyl-CoA (a small fuel molecule your cells can use). This links early sugar use to the mitochondria's main energy pathway.
Its protein sits at the center of the pyruvate dehydrogenase complex (a group of proteins that works together to process sugar fuel). It accepts a carbon piece from one partner and passes it to the next so energy production keeps moving.
By helping make acetyl-CoA (a fuel molecule), DLAT supports the citric acid cycle (a series of steps cells use to release energy from food). This helps maintain ATP (the cell's main energy currency) for everyday tasks.
What is a variant?
A genetic variant is a minor difference in the DNA sequence within a gene. Variants are common and help explain normal differences between people, including appearance, metabolism, and the way the body responds to environmental influences. Many do not have 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
Variants in the DLAT gene can alter the protein's shape, stability, or ability to join the pyruvate dehydrogenase complex (a cell system that helps turn food into energy), which reduces activity and can raise lactate levels. This pattern shows how variants influence the DLAT gene's function: some variants partly lower activity, while more severe variants leave very little activity. In DLAT-related pyruvate dehydrogenase deficiency, this remaining activity often influences how early symptoms appear and how marked they are.
How variants are linked to conditions
Among DLAT gene variants linked to health conditions, the clearest association is pyruvate dehydrogenase E2 deficiency, a rare inherited condition that may cause high lactic acid levels, low muscle tone, developmental delay, seizures, and Leigh syndrome. In most people with this condition, two pathogenic variants in the DLAT gene, one from each parent, confirm the diagnosis.
A variant is not necessarily a diagnosis
Genetic variants are a common and expected part of human biology. Most do not directly affect health and simply reflect normal human diversity. For many genes, carrying a variant associated with a condition points to a possible link rather than a certain diagnosis, especially when several genes and environmental factors play a role. In some situations, though, a single well understood variant in a particular gene can be enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For DLAT, personal risk is mainly shaped by the gene changes someone is born with, especially when a condition linked to DLAT runs in a family. There is not yet broadly confirmed evidence that lifestyle or everyday exposures clearly increase or lower DLAT-related risk, so anyone worried about personal or family risk should speak with a doctor or genetic counselor.
Inheritance of DLAT variants
DLAT-related conditions are inherited in an autosomal recessive pattern. This means a person usually inherits one DLAT gene variant from each parent, and parents who each carry one variant are typically unaffected. For each pregnancy, two carrier parents have a 25% chance of having a child with the condition, a 50% chance of having a child who is a carrier, and a 25% chance of having a child without either variant. In practical terms, how DLAT gene variants are inherited often becomes clear only after family testing shows that both sides of the family carry the same condition-linked change.
What does my DLAT result mean for my family?
For families, a DLAT result is usually relevant in a recessive condition, which means parents are often healthy carriers and brothers or sisters may also be carriers or, less often, affected. Close relatives may want to learn whether the same change runs in the family, especially if there is a history of early neurologic problems, low muscle tone, or unexplained lactic acidosis. A child of someone with a DLAT-related condition will usually be a carrier unless the other parent also carries a DLAT change.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the DLAT gene, doctors use DLAT genetic testing on a blood sample, saliva sample, or cheek swab. The lab reads the gene's DNA code and compares it with the usual sequence to look for changes. Results can show whether a variant was found.
When should I consider getting a genetic test?
Consider DLAT testing when a baby or child has signs of a rare energy-making condition, such as repeated high lactic acid levels, low muscle tone, seizures, or developmental delay, especially if similar problems run in the family. It can also help confirm the cause when other tests suggest a problem with how the body turns food into energy.
A genetic result is only one part of your health story
Genetic results can be helpful, but what they can tell you depends on the condition and the specific type of variant involved. How the body functions over time is also shaped by many factors, including lifestyle, environment, age, and medical history. For some conditions, especially those affected by many genes, genetic information provides context rather than certainty and is most useful when viewed together 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 into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. A treatment that works well for one person may work less well for another, or may cause more side effects, because the body can absorb, break down, or respond to the same drug in different ways. These inherited differences are common and can influence how strongly a medicine works or how sensitive someone is to it.
What is Pharmacogenetics?
Pharmacogenetics examines the ways genetic differences shape a person’s response to medicines. It studies links between genes and medications to clarify why the same treatment can affect people differently. For many drugs, genes influence either how powerfully a medicine works or how the body handles it. This information can support better informed, more individualized treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the DLAT gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choices or predicting side effects. For now, questions about new symptoms, medicine side effects, or whether a treatment is working as expected are best discussed with your doctor or pharmacist.
History
Research on the DLAT gene grew out of mid 20th century work on the pyruvate dehydrogenase complex, when scientists were sorting out the protein parts needed for energy metabolism. Initially understood only through visible traits, later recognized as tied to a specific gene, this work moved from biochemistry to human genetics as sequencing methods improved. From these first observations, research expanded steadily, and the human DLAT gene was mapped and characterized as part of the larger effort to define the genes behind mitochondrial conditions. Interest in DLAT increased again when modern cancer research linked it to cuproptosis, a form of cell death driven by copper. Over time, scientists’ understanding of the gene’s role has changed, reflecting the broader shift from classic enzyme studies to precision genetics.