The HACE1 gene helps cells control growth, movement, and the removal of worn out proteins. If this gene does not work properly, brain development and nerve signaling can be affected, which may lead to developmental delay, low muscle tone, balance or walking problems, and sometimes seizures. It also helps keep cell growth in check, so changes in this gene can matter for how cells stay healthy over time.
What is a gene?
Genes are stretches of DNA that carry instructions your cells use to make molecules or direct activities in the body. Some genes provide the code for proteins, which do much of the cell’s work. Other genes mainly regulate when certain processes take place, where they happen, and how active they are. Taken together, genes affect how the body develops and functions, and they can also influence how you respond to food, stress, and medications. You can find more detailed information on this topic in the LearnHub.
Overview
HACE1Gene function
What if the gene works
The HACE1 gene helps cells control growth and movement. Its protein tags certain proteins for removal, which supports normal cell balance and helps protect tissues from harmful overgrowth.
Risk
What if the gene does not work
When both copies of the HACE1 gene do not work, children may have delayed development, low muscle tone, walking difficulties from stiffness, and sometimes seizures. Milder or more severe variants can affect when symptoms start and how pronounced they are.
Treatment
What does that mean for your treatment
No HACE1-specific treatment or management approach is currently established for people with a pathogenic variant in the HACE1 gene. In research, the HACE1 gene is being studied mainly as a tumor suppressor and possible biomarker in some cancers, not as a guide to routine drug choice.
Conditions associated with HACE1
Gene function
What if the gene works
In everyday cell work, the HACE1 gene helps manage how certain proteins are tagged and cleared away. This keeps cell growth, shape, and internal cleanup more balanced. Understanding how the HACE1 gene works in cells helps explain how many tissues stay organized over time.
The HACE1 gene helps place small chemical tags on selected proteins. These tags tell the cell when a protein should be moved, recycled, or broken down.
One important target is RAC1, a protein that helps guide cell shape, movement, and growth signals. By keeping RAC1 activity more controlled, the HACE1 gene supports orderly cell behavior.
HACE1 also helps direct some damaged proteins and worn cell parts toward the cell recycling system. This steady cleanup supports everyday cell health and routine cell function.
What is a variant?
A genetic variant is a small difference in the DNA sequence within a gene. These differences are common and form part of normal human diversity, including variations in appearance, metabolism, and how the body responds to environmental influences. Many have no noticeable effect and simply reflect natural genetic variation. Sometimes, however, a variant changes how a gene functions more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the HACE1 gene often lower the amount of HACE1 protein a cell can make or change its shape so it cannot properly tag other proteins for control or breakdown. Understanding how variants in the HACE1 gene affect protein function helps explain why some changes are milder, while more severe variants can leave little or no working protein. In the rare condition linked to HACE1, this can influence how early symptoms appear and how broad they are.
How variants are linked to conditions
Pathogenic variants in both copies of the HACE1 gene cause a rare inherited condition called spastic paraplegia and psychomotor retardation with or without seizures. In practice, HACE1 gene variants linked to conditions most often involve developmental delay, low muscle tone in infancy, increasing stiffness in the legs, difficulty walking, and sometimes seizures. Some children also have speech delay or features of autism.
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 contribute to natural human variation. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when several genes and environmental factors are involved. In some situations, though, a single well understood variant in a specific gene can be enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For HACE1, risk is mainly shaped by family history rather than lifestyle. A child’s chance of having an HACE1-related condition is higher when both biological parents carry a harmful change in the HACE1 gene, and this can be more common in closely related parents. There is not enough evidence to say that diet, exercise, or other daily habits change this genetic risk.
Inheritance of HACE1 variants
For families asking how HACE1 gene variants are inherited, the best established pattern is autosomal recessive. This means a child usually inherits one HACE1 variant from each parent, and the parents are typically healthy carriers. When both parents carry a disease causing variant in the HACE1 gene, each pregnancy has a 25% chance of an affected child, a 50% chance of a carrier child, and a 25% chance of a child without the familial variants. Boys and girls are affected equally.
What does my HACE1 result mean for my family?
For HACE1, the best-known inherited condition follows a recessive pattern, which means close relatives may also carry the gene change even if they do not have symptoms. Parents of an affected child are often carriers, and brothers or sisters may also be affected or be carriers. Other family members, such as aunts, uncles, and cousins, may carry the change too, especially on the same side of the family.
Genetic information
Genetic testing
How you find out about variants
To find out about variants in the HACE1 gene, HACE1 genetic testing analyzes DNA from a blood or saliva sample using sequencing, sometimes with deletion and duplication testing to look for missing or extra pieces. This can show whether you carry an HACE1 gene variant and whether one or two copies are affected, which helps clarify a diagnosis or carrier status.
When should I consider getting a genetic test?
Testing for the HACE1 gene may be considered when a child has unexplained developmental delay, low muscle tone, seizures, or increasing muscle stiffness and walking problems, especially if similar problems run in the family. It can help clarify whether a rare inherited condition affecting the brain and movement is the cause.
A genetic result is only one part of your health story
Genetic results can provide useful insight, but how much they reveal varies by the condition and the kind of variant involved. Over time, the way the body works is shaped by many factors, including lifestyle, environment, age, and medical history. In some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is most helpful when viewed alongside other parts of care. In other situations, a genetic result can give a clear answer. In areas such as medication response, genetic results may also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body responds 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 can work well for one person, cause side effects in another, or seem to have little effect in someone else. These differences are common and are one part of why medication response varies from person to person.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It looks at relationships between genes and drugs to help explain why the same treatment can work differently from one person to another. For many medicines, genes can shape both how strongly a drug works and how the body handles it. This information can support treatment decisions that are more informed and more individualized. If you want to explore this subject further, you can learn more in the LearnHub.
Drugs influenced by the HACE1 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication response, so questions about side effects, medicines not working as expected, or changes in your health are best discussed with your doctor.