The TMEM151A gene gives the body instructions for a protein found mainly in the brain, where it appears to help nerve cells control movement. When a variant disrupts this gene and it does not work properly, some people have brief episodes of involuntary movements brought on by sudden movement, known as paroxysmal kinesigenic dyskinesia. Symptoms and severity can vary.
What is a gene?
Genes are stretches of DNA that hold instructions your cells use to make molecules or manage activities in the body. Some genes provide the directions for producing proteins, which do much of the cell’s work. Others mainly regulate when certain processes happen, where they happen, and how active they are. In combination, genes affect how the body grows and works, and they can influence your response to food, stress, and medicines. For a deeper look at this topic, LearnHub offers more information.
Overview
TMEM151AGene function
What if the gene works
The TMEM151A gene provides instructions for a membrane protein active mainly in the nervous system. It is thought to support normal signaling in brain pathways that help control movement.
Risk
What if the gene does not work
Changes in the TMEM151A gene are linked to paroxysmal kinesigenic dyskinesia, with brief involuntary movement episodes often triggered by sudden motion. Milder or more severe variants can influence when episodes start and how often they happen.
Treatment
What does that mean for your treatment
No treatment or management approach specifically tied to the TMEM151A gene is currently established. The TMEM151A gene is being studied in some cases of paroxysmal kinesigenic dyskinesia, but this has not yet changed drug choices in clinical guidelines.
Gene function
What if the gene works
Inside brain cells, the TMEM151A gene helps build a small protein that sits in cell membranes. It is most active in the nervous system, where organized signaling supports smooth, controlled movement. In day to day cell work, this gene helps nerve cells do their jobs steadily.
The TMEM151A gene gives nerve cells instructions for a protein that sits in cell membranes. That placement helps the cell organize signals in the right place.
This gene is especially active in the nervous system, where nerve cells need steady communication. Understanding the TMEM151A gene's role in brain signaling helps explain how movement pathways stay coordinated.
What is a variant?
A genetic variant is a slight alteration in the DNA sequence of a gene. These changes are common and are part of normal human diversity, including differences in appearance, metabolism, and the way the body responds to environmental influences. Many variants do not cause any noticeable effect and simply represent natural genetic variation. In some situations, though, a variant can change how a gene functions more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the TMEM151A gene often reduce how much working TMEM151A protein a nerve cell makes or how stable that membrane protein is. In paroxysmal kinesigenic dyskinesia, more disruptive TMEM151A gene variants can create a shortened protein or cause the altered message to be cleared away early, while some missense variants may leave partial function. This spectrum can shape the functional effect and may influence when symptoms begin or how prominent they are.
How variants are linked to conditions
Pathogenic variants in the TMEM151A gene cause paroxysmal kinesigenic dyskinesia, so TMEM151A gene variants linked to paroxysmal kinesigenic dyskinesia are the main recognized health association for this gene. People with this diagnosis usually have brief, repeated episodes of involuntary movements triggered by sudden motion, and symptoms can vary between family members.
A variant is not necessarily a diagnosis
Variants are a usual part of human biology and are common across the general population. 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 suggests a possible link rather than a definite diagnosis, especially when multiple genes and environmental factors also play a role. 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?
There is not yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the TMEM151A gene. For many living with a TMEM151A change, episodes can still vary from person to person, and a doctor or genetic counselor can help put personal and family risk into context.
Inheritance of TMEM151A variants
TMEM151A-related conditions are inherited in an autosomal dominant pattern, which explains how TMEM151A variants are inherited in many families. This means a child can inherit the variant from either parent, and a parent carrying it has a 50% chance of passing it on in each pregnancy. Sons and daughters are affected equally because the TMEM151A gene is on a non-sex chromosome. Some people who inherit a TMEM151A variant may have symptoms, while others may have little or no noticeable effect.
What does my TMEM151A result mean for my family?
Changes in the TMEM151A gene have been linked to a movement condition that often runs in families in a dominant pattern, which means close relatives such as a parent, brother, sister, or child may also carry the same gene change. In a family with a confirmed TMEM151A-related condition, some relatives may have similar brief movement episodes, while others may have milder symptoms or none that are obvious. This kind of result can matter for family members because it may help explain symptoms across generations and can guide whether relatives want to learn their own genetic status.
Genetic information
Genetic testing
How you find out about variants
TMEM151A genetic testing looks for DNA variants using a blood sample or saliva sample. In practice, how TMEM151A genetic testing works is simple: a lab reads the gene’s sequence and compares it with the usual version to see whether a variant is present. Results help clarify whether a specific TMEM151A variant was found.
When should I consider getting a genetic test?
Genetic testing for the TMEM151A gene may be worth considering if someone has repeated brief attacks of unusual movements brought on by sudden movement, especially when these episodes run in the family. A result can help clarify whether TMEM151A is part of the cause.
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 involved. How the body functions over time is 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 understood 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 help put personal experiences into perspective.
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 reacts to it at its target, so the same treatment may work better for one person than for another. This is a common part of normal human variation and can influence both how much benefit a medicine gives and how sensitive someone is to side effects.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in a person’s genes affect their response to medicines. By studying the relationship between genes and drugs, it helps explain why the same treatment may work differently from one person to another. For many medications, genes can influence how strongly a drug works or how the body processes it. Understanding this can support treatment decisions that are more informed and more individualized. More detail on this topic is available in the LearnHub.
Drugs influenced by the TMEM151A gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting medicine response, so general health concerns or questions about medicines are best discussed with your doctor.
History
TMEM151A entered medical genetics quite recently, as researchers searched for answers in families with movement symptoms that were not explained by earlier known genes. In 2021, several research groups reported that variants in the TMEM151A gene were linked to paroxysmal kinesigenic dyskinesia, a condition that causes brief episodes of involuntary movement. From these first observations, research expanded steadily. The discovery was important because it helped explain cases that had remained unsolved after PRRT2 testing. Since then, TMEM151A has become part of the growing picture of how rare inherited movement conditions are identified and classified.