The TMEM151B gene is active in the brain and supports nerve cells in the pathways that help control movement. When this gene does not work properly, some people develop paroxysmal kinesigenic dyskinesia, a condition with brief attacks of involuntary movements triggered by sudden movement. In medicine, this gene is important because changes in it can identify a genetic explanation for these attacks. It is mainly discussed in neurology and genetics clinics rather than popular media.
What is a gene?
Genes are stretches of DNA that carry instructions your cells use to make molecules or regulate processes in the body. Some genes provide the information needed to produce proteins, the parts of cells that do the work. Others mainly direct when certain processes take place, where they happen, and how strongly they are carried out. Together, genes affect how the body develops and functions, and they can influence how you respond to food, stress, or medications. For a more in depth look at this topic, you can find additional information in the LearnHub.
Overview
TMEM151BGene function
What if the gene works
The TMEM151B gene helps make a protein found mainly in nerve cells. This protein is thought to support normal brain signaling, especially in pathways involved in movement.
Risk
What if the gene does not work
Changes in the TMEM151B gene may alter how its cell membrane protein is made or positioned. Milder variants may leave some activity intact, while more severe variants can reduce or stop the protein's function.
Treatment
What does that mean for your treatment
No treatment or management approach specific to the TMEM151B gene is currently established for people with a pathogenic variant in the TMEM151B gene. The TMEM151B gene is mainly being studied to understand paroxysmal movement symptoms, and treatment still relies on standard symptom based medicines rather than a gene directed drug choice.
Gene function
What if the gene works
Nerve cells depend on carefully timed signals to help you move, feel, and think. In your body, the TMEM151B gene supports processes that take place at cell membranes, especially in the nervous system. Its protein becomes part of the membrane itself, where cells organize everyday signaling.
The TMEM151B gene makes a protein that spans cell membranes. This positioning lets the protein take part in steps at the membrane that help cells receive and organize signals.
TMEM151B is especially active in the brain and other nerve tissue, where precise timing matters. This pattern supports its role in routine nerve cell communication and signal control.
What is a variant?
A genetic variant is a minor change in the DNA sequence within a gene. These changes are common and are part of normal human diversity, such as 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 functions more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Pathogenic variants in the TMEM151B gene usually reduce how much TMEM151B protein a cell can make or leave it unstable, which is how variants influence the TMEM151B gene's function at a cellular level. Many known changes create an early stop signal or disrupt RNA splicing, so the protein is shortened or not produced normally at all. Other variants may alter folding or membrane placement. Milder variants may leave some activity, while more severe loss of function can have a larger effect and is linked to paroxysmal kinesigenic dyskinesia, although symptoms can vary.
How variants are linked to conditions
TMEM151B does not yet have a broadly confirmed link to a specific health condition, although research on how TMEM151B gene variants are linked to conditions is still developing. If you have a confirmed variant in the TMEM151B gene, your doctor or genetic counselor can interpret it in the context of your personal and family history.
A variant is not necessarily a diagnosis
Genetic variants are common across the general population and are a normal part of human biology. Most do not have a direct effect on health and simply contribute to natural human diversity. For many genes, carrying a variant associated with a condition indicates a possible link rather than a definite diagnosis, especially when multiple genes and environmental factors are involved. 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 TMEM151B gene itself. In families with a disease-causing TMEM151B change, symptoms can vary from person to person, and sudden movement, stress, or lack of sleep may trigger episodes in those already affected rather than change whether the condition is inherited.
Inheritance of TMEM151B variants
For TMEM151B-related paroxysmal kinesigenic dyskinesia, the TMEM151B gene inheritance pattern is autosomal dominant. This means a child can inherit the variant from either parent, and each pregnancy carries a 50% chance of passing on the altered copy. Sons and daughters are affected at similar rates because the TMEM151B gene is on a non-sex chromosome. In some families, a parent may carry the variant with few or no clear symptoms and still pass it on.
What does my TMEM151B result mean for my family?
There isn't yet a broadly confirmed inheritance pattern tied to a specific condition for TMEM151B, though this understanding can change as research develops. If you have a specific TMEM151B result and questions about what it could mean for your family, a doctor or genetic counselor can help explain it in the context of your personal and family history.
Genetic information
Genetic testing
How you find out about variants
TMEM151B genetic testing usually uses a blood or saliva sample to look for variants in the TMEM151B gene. It is often included in multigene panels or broader sequencing that reads many genes at once. Results can identify a disease-causing variant, a benign variant, or a variant of uncertain significance.
When should I consider getting a genetic test?
There is not yet a broadly established TMEM151B-specific reason for genetic testing in routine care. Testing decisions are usually based on your symptoms, family history, and a doctor or genetic counselor’s advice.
A genetic result is only one part of your health story
A genetic result can be very informative, but what it can tell you varies by the condition and the kind of variant present. How the body works over time is also shaped by many influences, including lifestyle, environment, age, and medical history. With some conditions, especially those linked to many genes, genetic information provides context rather than certainty and makes the most sense when viewed together with other parts of care. In other situations, the result may give a clear answer. In areas like medication response, genetic results can also help put personal 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, seems less effective for another, or causes more side effects in someone else. Small inherited differences can change how the body breaks down a drug, moves it through the bloodstream, or responds to it at its target.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in a person’s genes affect their 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 strongly a drug works and how the body processes it. This information can help support more informed and individualized treatment decisions. More detailed information on this topic is available in the LearnHub.
Drugs influenced by the TMEM151B gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding how medicines are chosen or adjusted, so any concerns about symptoms, side effects, or how well a treatment is working are best discussed with your doctor.
History
In recent decades, awareness of this gene’s role has grown. The TMEM151B gene entered the medical literature quite recently, after researchers studying families with sudden movement episodes found that some affected people did not have the usual PRRT2 gene change. In 2021, independent research groups linked variants in the TMEM151B gene to paroxysmal kinesigenic dyskinesia, a condition marked by brief attacks of involuntary movement. From these first observations, research expanded steadily. This discovery helped explain cases that had previously remained genetically unsolved and widened the picture of how inherited movement conditions can run in families. Since then, TMEM151B has been included more often in genetic testing panels for these symptoms.