The TTC23 gene helps cells organize protein teams in cilia, the tiny hairlike structures that guide important growth signals. When the TTC23 gene does not work properly, these signals may become less accurate, which can affect how the body develops. Variants in this gene have been linked to rare inherited conditions related to cilia function.
What is a gene?
Genes are sections of DNA that hold 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 carry out much of their work. Other genes mainly help control when certain processes happen, where they happen, and how strongly they occur. Taken together, genes affect how the body develops and functions, and they can also influence how you respond to food, stress, or medications. To explore this topic further, you can find more in the LearnHub.
Overview
TTC23Gene function
What if the gene works
The TTC23 gene helps organize primary cilia, tiny cell projections that sense signals. Through this role, it supports cell communication pathways that guide normal growth and development.
Risk
What if the gene does not work
Changes in the TTC23 gene can range from milder to more severe variants. These may reduce how well the TTC23 protein supports protein interactions in cilia, the tiny hair-like structures on cells, and can affect cilia assembly or maintenance.
Treatment
What does that mean for your treatment
No TTC23-specific treatment or management approach is currently established for pathogenic or loss-of-function variants in the TTC23 gene.
Gene function
What if the gene works
Many cells have tiny hair-like structures called cilia that help move fluid in a controlled way. The TTC23 gene supports the setup of these structures by helping key cilia proteins sit in the right place. This steady organization helps cilia carry out their usual back-and-forth motion.
The TTC23 gene helps organize the inner framework of certain cilia, the tiny hair-like projections on the cell surface. It supports the placement of protein parts that cilia need for their normal shape and working order.
By helping these parts line up correctly, TTC23 supports the coordinated beating of motile cilia (cilia that move fluid). This is part of how the TTC23 gene helps cilia work in a smooth, even pattern.
Its protein helps cilia proteins connect at the right spot inside the cilium. This kind of orderly protein teamwork supports stable, routine cilia function.
What is a variant?
A genetic variant is a small difference 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 how 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 more substantially change how a gene functions and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the TTC23 gene can change how stable the protein is, how well it folds, or how effectively it interacts with partner proteins inside the cell. This is how variants in the TTC23 gene affect its function: milder variants may only weaken these interactions, while more severe variants can disrupt RNA splicing (the way the cell edits gene messages) or lead to little or no working protein.
How variants are linked to conditions
Right now, the TTC23 gene does not yet have a broadly confirmed link to a specific health condition, so information about TTC23 gene variants and health conditions is still developing. If you have a confirmed variant in the TTC23 gene, your doctor or genetic counselor can place that result in the context of your personal health and family history.
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 directly affect health and simply contribute to natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a confirmed diagnosis, especially when several 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 TTC23 gene. If TTC23 is found on a genetic test, its meaning depends on the exact change and the person’s overall health and family history.
Inheritance of TTC23 variants
There is not yet a broadly confirmed Mendelian pattern for inheritance of the TTC23 gene variants tied to a specific human condition, and this picture may become clearer as research develops. For families asking about the inheritance of the TTC23 gene variants, the key point is that TTC23 is located on an autosome, meaning you inherit one copy from each parent and inheritance is not based on being male or female.
What does my TTC23 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific health condition for TTC23. Research on this gene is still developing, so the meaning for relatives depends a lot on the exact result and why testing was done. If you have a TTC23 result, a doctor or genetic counselor can explain what it may mean for your family.
Genetic information
Genetic testing
How you find out about variants
To find variants in the TTC23 gene, genetic testing for TTC23 variants usually uses a blood or saliva sample. Labs read the gene's DNA as part of a multi-gene panel, exome, or genome test and compare it with a reference sequence. Results may show a benign variant, a variant of uncertain significance, or a variant that helps explain a diagnosed condition.
When should I consider getting a genetic test?
There is not yet a broadly established TTC23-specific reason for genetic testing in routine care. Testing choices are usually based on your symptoms, family history, and guidance from a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic result can provide valuable insight, but what it reveals depends on the condition and the type of variant involved. Factors such as lifestyle, environment, age, and medical history also influence how the body functions over time. For some conditions, especially those shaped 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 give a clear answer. In areas like 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 medication may work well for one person, seem less effective for another, or cause more side effects in someone else. Part of the reason is that the body can absorb, break down, transport, or respond to a drug differently based on inherited DNA changes, and this kind of variation is common.
What is Pharmacogenetics?
Pharmacogenetics examines the ways genetic differences affect how people respond to medicines. By looking at relationships between genes and drugs, it helps explain why the same treatment can work differently from one person to another. With many medicines, genes influence both how strongly a drug works and how the body handles it. This information can support treatment decisions that are better informed and more individualized. More detailed information on this topic is available in the LearnHub.
Drugs influenced by the TTC23 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choice or response. Questions about side effects, changing medicines, or ongoing health concerns are best discussed with your doctor or pharmacist.