The FAM216A gene helps cells build and use cilia, tiny structures that pass signals needed for early development. This gene plays an important role in how the brain and other organs form, so a variant that disrupts it can cause a rare inherited ciliopathy, including Joubert syndrome in some families. Depending on the variant, people may have problems with coordination, eye movement, breathing control in infancy, or vision.
What is a gene?
A gene is a stretch of DNA that carries instructions your cells use to make molecules or manage activities in the body. Some genes provide the directions for building proteins, which do much of the cell’s work. Others are mainly involved in regulating when certain activities happen, where they take place, and how active they are. Taken together, genes affect how the body grows and works, and they can influence how you react to food, stress, or medicines. For a deeper look at this topic, you can find more in the LearnHub.
Overview
FAM216AGene function
What if the gene works
The FAM216A gene gives cells instructions for a small protein. This protein may help with normal cell activity inside the body.
Risk
What if the gene does not work
Variants in the FAM216A gene can change how much FAM216A protein is made or how stable it is inside cells. Milder variants may partly reduce protein function, while more severe variants can markedly impair its usual cellular role.
Treatment
What does that mean for your treatment
No gene-specific treatment or management approach is currently established for pathogenic variants in the FAM216A gene.
Gene function
What if the gene works
In normal cells, the FAM216A gene supports the orderly layout of the cell interior. This helps cells keep their shape and move materials where they are needed. Understanding the normal function of the FAM216A gene helps explain how cells carry out steady, everyday work.
The protein made from the FAM216A gene helps organize the cell’s inner support system. This keeps key cell parts positioned properly so routine tasks can happen in a controlled way.
Its protein supports the cell’s internal tracks, which help materials move to the right place inside the cell. This contributes to smooth day to day cell activity.
What is a variant?
A genetic variant is a slight difference in the DNA sequence within a gene. These differences are common and help explain normal human diversity, such as variation 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 situations, though, a variant can change how a gene functions more strongly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Changes in the FAM216A gene can affect how much protein a cell makes, how stable it is, or how well it binds to other cell components. When people look at how variants in the FAM216A gene affect protein function, severity often matters: a missense variant may leave some activity, while a truncating or deletion variant can markedly reduce or abolish it. These differences can create a spectrum of cellular effects.
How variants are linked to conditions
Current evidence has not yet established how FAM216A gene variants are linked to health conditions in a broadly confirmed way. Research may clarify over time whether changes in the FAM216A gene are tied to a specific diagnosis, and people with a confirmed FAM216A-related finding should follow advice from their doctor or genetic counselor.
A variant is not necessarily a diagnosis
Genetic variants are a normal feature of human biology and are common throughout 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 suggests a possible link rather than a definitive diagnosis, especially when multiple genes and environmental factors contribute. In some situations, though, a single well-characterized variant in a particular gene can be 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 FAM216A gene. If testing has found a change in FAM216A, a doctor or genetic counselor can help explain what it may mean for your personal and family risk.
Inheritance of FAM216A variants
There is not yet a broadly confirmed disease specific inheritance pattern for the FAM216A gene, so how variants of the FAM216A gene are inherited in relation to health is still being worked out. FAM216A is located on chromosome 1, which is an autosome. That means you inherit two copies of the FAM216A gene overall, one from your mother and one from your father.
What does my FAM216A result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific condition for FAM216A, and this picture may become clearer as research grows. If you have a specific FAM216A result and want to understand what it could mean for close relatives, a doctor or genetic counselor can explain it in the context of your family history and the exact result.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a change in the FAM216A gene, clinicians use genetic testing on blood, saliva, or a cheek swab. In genetic testing for FAM216A variants, a lab reads the gene’s DNA code and compares it with the usual sequence. Results may show a variant, no variant found, or an unclear finding.
When should I consider getting a genetic test?
A broadly established, FAM216A-specific reason for genetic testing in routine care has not been defined. Testing decisions are usually made with a doctor or genetic counselor based on symptoms, family history, and whether broader genetic testing may help.
A genetic result is only one part of your health story
Genetic test results can provide meaningful insight, but what they reveal depends on the condition and on the type of variant involved. Over time, many factors, including lifestyle, environment, age, and medical history, also influence how the body works. For some conditions, especially those shaped by many genes, genetic information provides context rather than certainty and is most useful when viewed alongside other parts of care. In other situations, a genetic result can offer a clear answer. In areas like medication response, these results can also help make sense of individual experiences.
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, while others may be more or less sensitive to its effects. This helps explain why the same treatment works well for one person, has less effect in another, or causes more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics looks at how differences in a person’s genes can shape the way they respond to medications. It examines links between genes and drugs to help explain why the same treatment can work differently from one person to another. For many medicines, genes affect how the body processes a drug and how strong its effects may be. This information can support more informed, individualized treatment decisions. You can learn more about this topic in the LearnHub.
Drugs influenced by the FAM216A gene
When should I seek medical advice?
There isn't yet a broadly confirmed role for this gene in guiding medication choice or predicting how well a medicine will work. Questions about side effects, new symptoms, or how your medicines fit with your overall health are best discussed with your doctor or pharmacist.