The DMRT3 gene helps nerve cells in the spinal cord organize the signals that coordinate walking and other rhythmic movements. If it does not work as expected, movement can become less well coordinated, which may affect motor development, balance, or the way the legs move together. This gene plays an important role in the body’s movement network, especially in timing left and right leg motion. DMRT3 also became widely known through horse genetics, because a variant in this gene influences gait and racing style in some breeds.
What is a gene?
Genes are stretches of DNA that hold instructions your cells use to make molecules or regulate processes in the body. Some genes provide the information needed to make proteins, the parts of cells that do much of the work. Others mainly help direct when certain processes happen, where they take place, and how active they are. Together, genes affect how the body develops and functions, and they can also shape how you respond to food, stress, or medications. For a more detailed look at this topic, you can learn more in LearnHub.
Overview
DMRT3Gene function
What if the gene works
The DMRT3 gene helps certain spinal cord nerve cells develop and organize movement circuits. These circuits support coordinated walking and other rhythmic movements by helping signals between the left and right sides of the body stay timed.
Risk
What if the gene does not work
Milder to more severe variants in the DMRT3 gene can reduce how well this DNA binding protein controls gene activity in developing spinal nerve cells. This may disrupt the formation and signaling of certain spinal cord nerve cells.
Treatment
What does that mean for your treatment
For pathogenic or loss-of-function variants in the DMRT3 gene, no DMRT3-specific treatment or drug-selection approach is currently established. The DMRT3 gene is being studied mainly in early-stage research on spinal cord movement circuits, not as a current guide for routine treatment decisions.
Conditions associated with DMRT3
Gene function
What if the gene works
Smooth, well-timed movement depends on nerve cells in the spinal cord working in sync. The DMRT3 gene helps shape part of that system during development by guiding certain nerve cells as they mature. This helps explain how the DMRT3 gene supports walking and other repeated movements.
The DMRT3 gene helps control when other genes are switched on or off in developing nerve cells. This guidance helps cells follow the right steps as the spinal cord takes shape.
It supports the formation of a specific group of spinal cord nerve cells that connect with movement pathways. These cells help link signals across the left and right sides of the body in a coordinated way.
This gene contributes to nerve networks that organize rhythmic motions such as walking or running. By helping time these signals, it supports smoother alternation between the legs during repeated movement.
What is a variant?
A genetic variant is a minor change in a gene’s DNA sequence. 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 have any noticeable effect and simply reflect natural genetic variation. Sometimes, though, a variant changes how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
In discussions of how DMRT3 gene variants affect function, the main issue is how much they change the DMRT3 protein’s shape, stability, and ability to bind DNA. Some variants may only partly reduce this activity, while more disruptive variants can shorten the protein, make it break down sooner, or leave it with little to no function. Variants can also weaken how the protein interacts with other gene-control partners inside the cell.
How variants are linked to conditions
Right now, the DMRT3 gene does not yet have a broadly confirmed link to a specific health condition, although research on whether DMRT3 gene variants are linked to health conditions is still developing. Anyone with a confirmed DMRT3-related diagnosis should rely on guidance from their doctor or genetic counselor rather than general information alone.
A variant is not necessarily a diagnosis
Gene variants are a routine part of human biology and are widely found across the population. Most do not directly affect health and simply contribute to normal human variation. In many genes, having a variant associated with a condition points to a possible link rather than a certain diagnosis, particularly when several genes and environmental influences play a role. Still, in some situations, one well-characterized variant in a particular 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 DMRT3 gene. Anyone concerned about a DMRT3 gene result or a family history of related findings can talk with a doctor or genetic counselor about personal risk.
Inheritance of DMRT3 variants
There is not yet a broadly confirmed Mendelian inheritance pattern tied to a specific human condition for the DMRT3 gene, so the inheritance of the DMRT3 gene variants is still being clarified as research develops. The DMRT3 gene is located on chromosome 9, which is an autosome. That means you inherit one copy of the DMRT3 gene from your mother and one copy from your father.
What does my DMRT3 result mean for my family?
There is not yet a broadly confirmed, condition-specific inheritance pattern for DMRT3 in people. Research on this gene is still developing, so what a DMRT3 result may mean for relatives depends a lot on the exact finding and why testing was done. A doctor or genetic counselor can explain what, if anything, it may mean for family members in your situation.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for DMRT3 variants usually uses a saliva sample or blood sample. A lab reads the DNA in the DMRT3 gene to look for specific variants or to sequence the whole gene, then compares the result with reference data. Results may show a variant, no variant detected, or a finding with uncertain meaning.
When should I consider getting a genetic test?
There isn't yet a broadly established, DMRT3-specific clinical reason for testing in routine care. Decisions about genetic testing are usually based on symptoms, personal health history, and family history, and are best discussed with a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic result can provide valuable insight, but how much it can tell you varies depending on the condition and the type of variant involved. How the body works over time is also 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 most useful when considered alongside other parts of care. In other situations, a genetic result may offer a clear answer. In areas such as 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, seems less effective for another, or causes more side effects in someone else. Small differences in how the body absorbs, breaks down, transports, or responds to a drug are common, and they can influence both benefit and sensitivity.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way a person responds to medication. It studies the relationship between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes can influence both how strongly a drug works and how the body processes it. This information can support more informed and more individualized treatment decisions. More about this topic is available in the LearnHub.
Drugs influenced by the DMRT3 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choice or dosing, so questions about medicine side effects, treatment changes, or new symptoms are best discussed with your doctor.
History
Interest in the DMRT3 gene grew after a 2012 study linked it to alternate gaits in horses, especially breeds known for pacing or smooth riding patterns. Across cultures and centuries, inherited traits linked to this gene were observed in different ways, long before DNA testing could explain them. The finding drew wide attention in horse breeding because it helped explain why some horses are more likely to trot, pace, or perform other special gaits. Soon after, research in mice showed that the DMRT3 gene also has an important role in the nerve circuits that coordinate movement. From these first observations, research expanded steadily, and DMRT3 became a well-known example of how genetics can shape locomotion across species.