The BRAT1 gene helps cells cope with stress, repair damage to DNA, and support energy use, especially in the brain. When both copies of the BRAT1 gene do not work properly, the nervous system may not develop or function as expected. This can lead to seizures, changes in muscle tone such as stiffness or low tone, developmental delay, and problems with movement or balance. Some people have very severe symptoms beginning in infancy, while others have a milder neurodevelopmental condition.
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 provide the directions for making proteins, the parts of cells that do much of the work. Others mainly help control when certain processes happen, where they happen, and how strongly they run. Together, genes affect how the body develops and functions, 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
BRAT1Gene function
What if the gene works
The BRAT1 gene helps cells respond to DNA damage and supports normal mitochondrial function. Its protein also helps maintain cell growth and survival.
Risk
What if the gene does not work
Variants in the BRAT1 gene can cause a spectrum of neurologic conditions, from early severe seizures with stiffness and breathing problems to milder developmental delay, movement problems, or later-onset epilepsy. More disruptive variants often lead to earlier, more severe symptoms.
Treatment
What does that mean for your treatment
No treatment or management approach specific to the BRAT1 gene is currently established. Care is supportive and guided by a person's symptoms rather than by a targeted drug choice. Research on the BRAT1 gene is exploring its role in cell stress responses and brain development, but this has not yet led to a targeted therapy.
Conditions associated with BRAT1
Gene function
What if the gene works
Your cells rely on the BRAT1 gene for smooth repair signaling and steady growth. Its protein helps important cell messages get passed along at the right time. This helps explain how the BRAT1 gene helps repair DNA and support everyday cell function.
The BRAT1 gene helps your cells sense DNA damage and start a repair response. It supports ATM (a protein that coordinates repair signals) so routine DNA stress can be handled in an orderly way.
The BRAT1 gene supports normal cell growth and division. By linking repair signals with daily cell activity, it helps cells move through their usual cycle in a controlled way.
Its protein helps pass messages between repair and growth systems. This timing lets cells pause for routine upkeep and then continue their normal cycle.
What is a variant?
A genetic variant is a slight change in the DNA sequence within a gene. These changes are common and help create normal human diversity, including differences in appearance, metabolism, or how the body responds to environmental influences. Many variants do not have any noticeable effect and are simply part of natural genetic variation. In some cases, though, a variant can change how a gene functions more significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
BRAT1 gene variants affect protein function by reducing how much working BRAT1 protein a cell can make, making it unstable, or weakening its contact with key cell stress and DNA repair partners. More disruptive variants, such as early stop or frameshift changes, may leave little or no usable protein, while some missense variants only partly reduce function. This range helps explain why BRAT1 related conditions can appear earlier and be more severe in some people, while others have milder findings.
How variants are linked to conditions
Pathogenic variants in the BRAT1 gene can cause a group of rare inherited brain conditions, often called BRAT1-related disorders. These include the severe newborn condition rigidity and multifocal seizure syndrome, as well as milder neurodevelopmental disorder with cerebellar atrophy, with or without seizures. In everyday terms, BRAT1 gene variants linked to seizures and developmental delay can affect movement, muscle tone, feeding, and learning, with severity varying widely.
A variant is not necessarily a diagnosis
Genetic variants are a normal feature of human biology and are widespread in the general population. Most do not have a direct effect on health and simply reflect natural variation among people. For many genes, carrying a variant associated with a condition suggests 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 characterized variant in a particular gene can 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 lifestyle or environmental factors that increase or reduce health risks linked to the BRAT1 gene. For many living with a BRAT1-related change, risk depends mainly on the exact genetic change, so personal guidance from a doctor or genetic counselor is most helpful.
Inheritance of BRAT1 variants
BRAT1-related conditions are usually inherited in an autosomal recessive pattern. This means a child inherits one BRAT1 variant from each parent, and the parents are typically healthy carriers with one changed copy and one working copy of the BRAT1 gene. When both parents carry a BRAT1 variant, each pregnancy has a 25% chance of an affected child, a 50% chance of a carrier child, and a 25% chance of a child without the familial variant. This is the usual answer to how BRAT1 gene variants are inherited in families.
What does my BRAT1 result mean for my family?
For BRAT1, family members are most often affected in a recessive pattern, which means parents are usually healthy carriers of one changed copy. Brothers and sisters may also be carriers, and in some families another child could have the same condition. Close relatives may want to learn whether they also carry a BRAT1 change, especially when planning a pregnancy.
Genetic information
Genetic testing
How you find out about variants
BRAT1 genetic testing looks for changes in the BRAT1 gene using a blood sample, saliva sample, or cheek swab. Labs read the gene’s DNA sequence and may also check for missing or extra pieces. Results can show whether a BRAT1 variant helps explain a person’s symptoms or supports carrier testing in a family.
When should I consider getting a genetic test?
Genetic testing for the BRAT1 gene may be considered when a baby or child has unexplained seizures, severe developmental delay, or muscle stiffness, especially if similar problems run in the family. It can also help if a BRAT1 change has already been found in a relative and you want to clarify recurrence risk.
A genetic result is only one part of your health story
Genetic results can provide useful insight, but how much they reveal depends on the condition and the specific type of variant. Many factors, including lifestyle, environment, age, and medical history, also influence how the body works over time. For some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is most helpful when considered alongside other parts of care. In other situations, a genetic result may give a clear answer. In areas such as medication response, genetic results can help place a person’s experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. 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, so the same treatment may work better for some people than for others. This kind of variation is common and can influence both how well a medicine works and how sensitive a person may be to side effects.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in genes can shape a person’s response to medications. By looking at connections between genes and drugs, it helps explain why the same treatment may work differently from one person to another. For many medicines, genes influence both how the body handles a drug and how strong its effects are. This information can support more informed, more individualized treatment decisions. More on this topic is available in the LearnHub.
Drugs influenced by the BRAT1 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how people respond to medicines, so concerns about side effects, new symptoms, or treatment changes are best discussed with your doctor.