The FTCD gene helps your body break down the amino acid histidine and supports folate use, which matters for making healthy blood cells and normal growth. If this gene does not work well, formiminoglutamic acid can build up in urine, and some people may have mild anemia or developmental differences, while others stay well. Most people only hear about FTCD after a newborn screening result or genetic test.
What is a gene?
A gene is a stretch of DNA that gives your cells instructions for making molecules or regulating processes in the body. In some genes, those instructions are used to make proteins, the parts of cells that do the work. Other genes mainly help direct when certain processes happen, where they happen, and how active they are. Taken 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 more in the LearnHub.
Overview
FTCDGene function
What if the gene works
The FTCD gene helps the liver break down histidine, a protein building block. It also supports folate use, which helps cells make and use DNA.
Risk
What if the gene does not work
Variants in the FTCD gene can cause FTCD deficiency, also called formiminoglutamic aciduria. Effects range from none to developmental delay, learning difficulties, or a type of anemia, and more disruptive variants may lead to earlier or more noticeable features.
Treatment
What does that mean for your treatment
No FTCD-specific treatment or drug selection approach is currently established for people with pathogenic variants in the FTCD gene. Management is usually based on a person’s symptoms rather than a targeted medicine tied to this gene.
Conditions associated with FTCD
Gene function
What if the gene works
Your cells use the FTCD gene to help break down histidine and support folate metabolism. This keeps small chemical fragments moving into pathways that cells use every day. Understanding the FTCD gene’s function helps you see how your cells handle nutrients in a steady, efficient way.
The FTCD gene helps your cells process histidine, an amino acid from food. Its protein transfers a small chemical fragment from a histidine byproduct onto folate, so that byproduct can keep moving through normal metabolism.
The same protein then changes that folate-linked compound into another usable folate form. This helps keep folate, also called vitamin B9, available for routine cell chemistry.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These differences are common and help shape normal human diversity, including differences in appearance, metabolism, and how the body responds to environmental influences. Many variants do not have any noticeable effect and are simply part of natural genetic variation. In some cases, though, a variant can change how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the FTCD gene can change the enzyme’s shape, stability, or length, so cells make less of it or clear it away sooner. Many FTCD gene variants reduce activity only partly, while more severe variants can leave little or no working enzyme. This disrupts a step in histidine breakdown and folate related chemistry inside cells. In FTCD deficiency, the amount of activity left may influence how noticeable features become.
How variants are linked to conditions
Pathogenic variants in the FTCD gene cause formiminoglutamic aciduria, a rare inherited condition, so the FTCD gene variants linked to conditions are mainly discussed in relation to this diagnosis. It may be picked up on newborn screening or during testing for high urinary FIGLU. Some people have developmental delay or mild anemia, while others have few or no noticeable symptoms.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are widely found in the general population. 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 points to a possible link rather than a certain diagnosis, especially when several genes and environmental factors play a role. In some situations, though, a single 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 FTCD gene. The main factor is which FTCD change is present and whether a person has one changed copy or two, while symptoms can still vary from one person to another.
Inheritance of FTCD variants
Variants in the FTCD gene are inherited in an autosomal recessive pattern. This means a child usually inherits one changed copy from each parent, and the parents are often healthy carriers. When both parents carry an FTCD gene variant, each pregnancy has a 25% chance of the child inheriting both variants, a 50% chance of being a carrier, and a 25% chance of inheriting neither changed copy. In families asking how FTCD variants are inherited, this pattern means boys and girls are affected equally.
What does my FTCD result mean for my family?
FTCD-related conditions are usually passed down in a recessive pattern, so close relatives may also carry a changed FTCD gene even if they feel well. Brothers and sisters of an affected child may have the condition or be carriers, and parents are usually carriers. Family members may want to review the result together so they understand who else could share the same gene change.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for FTCD variants uses a blood, saliva, or cheek swab sample to read the DNA in the FTCD gene. A laboratory compares your sequence with the usual version of the gene and reports whether any variants were found, along with whether they are known to be benign, uncertain, or linked to disease.
When should I consider getting a genetic test?
Genetic testing for the FTCD gene may be considered if a baby has an abnormal newborn screening result suggesting trouble breaking down the amino acid histidine, or if there is a family history of this inherited condition. It can help confirm whether a change in FTCD is the cause.
A genetic result is only one part of your health story
A genetic result can provide valuable insight, but how much it reveals depends on the condition and the type of variant involved. Over time, many factors shape how the body works, 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 help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body handles certain medicines, so the same treatment may work differently from one person to another. Some people break down a drug more slowly or more quickly, which can change how much of it reaches the body and how long it stays there. This kind of inherited difference is common and can influence how well a medicine works or how sensitive someone is to side effects.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in genes can affect a person’s response to medications. It looks at connections between genes and drugs to help explain why the same treatment can work differently from one person to another. For many medicines, genes influence how strongly a drug works or how the body handles it. This information can support more informed and more individualized treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the FTCD gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choices, so any concerns about side effects, new symptoms, or how your medicines may be working are best discussed with your doctor.