The TGM6 gene gives instructions for a protein that helps brain cells handle and link certain proteins, especially in areas that support balance and movement. If the TGM6 gene does not work properly, those cells may struggle to function, which can lead to unsteady walking, poor coordination, slurred speech, or tremor. Certain pathogenic variants in the TGM6 gene are linked to spinocerebellar ataxia type 35, an inherited condition that affects movement control.
What is a gene?
Genes are stretches of DNA that hold instructions cells use to make molecules or direct processes in the body. Some genes provide the code for proteins, which are the parts of cells that do the work. Others are used mainly to regulate when certain processes happen, where they happen, and how active they are. Taken together, genes affect how the body grows and works, and they can influence how you respond to food, stress, and medicines. For a deeper look at this subject, more information is available in the LearnHub.
Overview
TGM6Gene function
What if the gene works
The TGM6 gene gives instructions for a protein used mainly in the brain. It helps certain proteins link together, supporting nerve cell function and smooth coordination.
Risk
What if the gene does not work
Variants in the TGM6 gene are linked to spinocerebellar ataxia type 35, which often causes gradually worsening balance, coordination, and speech problems. Milder and more severe variants can influence when symptoms begin and how strongly movement is affected.
Treatment
What does that mean for your treatment
For a pathogenic variant in the TGM6 gene, no TGM6-specific treatment or drug selection approach is currently established. Care is usually guided by symptoms rather than the variant itself. The TGM6 gene is being studied in ataxia biology, but this has not yet led to an approved gene-directed treatment.
Conditions associated with TGM6
Gene function
What if the gene works
TGM6 helps nerve cells keep important proteins organized and steady. Its protein acts like a careful joiner, linking selected proteins so cell structures hold together. Understanding what the TGM6 gene does in the brain helps show how it supports smooth day to day cell function.
The TGM6 gene helps join certain proteins to each other. These links make protein networks more stable, which supports normal cell structure and upkeep.
It can attach small natural molecules to proteins. This can fine tune how some proteins behave, where they are used, and how long they stay in place.
The TGM6 gene is especially active in the brain and other parts of the nervous system. By helping manage protein stability there, it supports the routine maintenance nerve cells need for signaling and coordination.
What is a variant?
A genetic variant is a small difference in the DNA sequence within a gene. These changes are common and help shape normal human diversity, including 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 situations, however, a variant can affect how a gene functions more significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the TGM6 gene can alter the protein’s shape, stability, or enzyme activity, sometimes causing it to fold poorly, break down sooner, or interact less effectively with other proteins. This summary of how TGM6 gene variants affect protein function includes a spectrum from milder changes with partial activity to more severe variants that markedly reduce or abolish activity. In people with ataxia linked to variants in the TGM6 gene, more disruptive variants may be tied to earlier onset or more noticeable symptoms.
How variants are linked to conditions
Certain pathogenic variants in the TGM6 gene cause spinocerebellar ataxia type 35, an inherited condition that often leads to gradually worsening balance, coordination, and sometimes speech problems. In practical terms, the clearest answer to how TGM6 variants are linked to conditions is that the strongest, broadly accepted TGM6 gene disease association is with spinocerebellar ataxia type 35. Other reported links to neurologic conditions have been studied, but they are not as firmly established.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are widely found in 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 indicates a possible link rather than a certain diagnosis, especially when multiple genes and environmental factors also play a role. In some situations, however, 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 isn't yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the TGM6 gene. For many living with a TGM6 change, risk is mainly tied to the genetic variant itself rather than clear lifestyle or environmental factors, so personal guidance from a doctor or genetic counselor can be helpful.
Inheritance of TGM6 variants
TGM6-related ataxia is usually inherited in an autosomal dominant pattern. This means a parent carrying a disease-causing variant in the TGM6 gene can pass it to a child with a 50% chance in each pregnancy. In practical terms, how TGM6 gene variants are inherited often looks like the condition appearing across several generations, with affected mothers or fathers able to pass it to sons or daughters alike.
What does my TGM6 result mean for my family?
For TGM6, a disease-causing result is most often linked to a dominant inherited ataxia, which means close relatives such as a parent, brother, sister, or child may also carry the same change. In many families, each child of someone with the variant has a 1 in 2, or 50%, chance of inheriting it. Because of this, family members may want to discuss genetic counseling and possible testing.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for TGM6 variants uses a blood or saliva sample to read the TGM6 gene and look for changes. It may be done as part of an ataxia panel, exome sequencing, or genome sequencing. Results can show a pathogenic variant, a benign variant, or a variant of uncertain significance, which means the finding is not yet clear.
When should I consider getting a genetic test?
You may want to consider genetic testing for the TGM6 gene if you have ongoing problems with balance, walking, coordination, or slurred speech, especially when similar symptoms run in your family. In some families, a harmful TGM6 change can help confirm an inherited form of ataxia, a condition that affects movement and balance.
A genetic result is only one part of your health story
A genetic result can be helpful, but what it can tell you varies by the condition and the 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 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 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. Some people break down a drug more slowly or more quickly than expected, while others may be more or less sensitive to its effects. This helps explain why the same treatment can work well for one person, cause side effects in another, or seem to have little effect in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It focuses on gene-drug relationships to help explain why the same treatment can work differently in different people. For many medicines, genes influence how the body handles a drug and how strong its effects are. This understanding can support more informed, personalized treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the TGM6 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 used. If you have side effects, questions about a new treatment, or concerns about your health, talk with your doctor or pharmacist.