The SQSTM1 gene helps cells collect and clear damaged proteins and other worn out material, which supports healthy bones, nerves, and immune signaling. This gene plays an important role in your body’s recycling system. If the gene does not work properly, cellular waste can build up, and some people develop conditions such as Paget disease of bone or, less often, certain brain and nerve conditions. Many variants are harmless, while a few may change how the gene works.
What is a gene?
Genes are sections of DNA that carry instructions your cells use to make molecules or regulate activities in the body. Some genes provide the directions for building proteins, which do much of the cell’s work. Others are mostly involved in controlling 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. To go deeper into this subject, you can read more in the LearnHub.
Overview
SQSTM1Gene function
What if the gene works
The SQSTM1 gene helps cells collect and recycle damaged proteins and worn-out cell parts. It also supports cell signaling that helps maintain bone, immunity, and responses to stress.
Risk
What if the gene does not work
Variants in the SQSTM1 gene are known for causing Paget disease of bone and, in some families, nerve conditions such as ALS or frontotemporal dementia. Milder and more severe variants can affect when features begin and how pronounced they are.
Treatment
What does that mean for your treatment
No SQSTM1-specific treatment or drug choice is currently established. The SQSTM1 gene is being studied as a biomarker and possible drug target in neurodegeneration, bone disease, and some cancers.
Conditions associated with SQSTM1
Gene function
What if the gene works
Inside many cells, the SQSTM1 gene helps keep the internal environment tidy and responsive. It links unwanted material to the cell’s recycling system and helps coordinate signals used during everyday stress. Understanding how the SQSTM1 gene helps cells clear waste and manage stress makes its normal role easier to picture.
The SQSTM1 gene helps gather proteins and other cell material marked for removal. Its protein binds this cargo and holds it together so the cell can process it in an organized way.
It connects unwanted cargo to autophagy, the cell’s built in recycling system. This helps move worn out material into small sacs that carry it to be broken down and reused.
The SQSTM1 gene also helps organize signals used when cells face oxidative stress (stress from reactive oxygen molecules). This supports a measured response to everyday strain and helps keep routine cell activity on track.
What is a variant?
A genetic variant is a minor change 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 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 may change how a gene functions more significantly and can contribute to, or cause, a genetic condition.
Genetic variants
What if the gene does not work
Many SQSTM1 gene variants change the p62 protein’s shape or key binding areas, so it may become less stable or interact less well with other proteins. This can weaken the cell’s waste removal pathway and allow unwanted material to build up. Understanding how SQSTM1 gene variants affect p62 protein function helps explain why some are milder and partly reduce activity, while more severe variants can cause loss of function and are sometimes linked to earlier or broader disease features.
How variants are linked to conditions
Variants in the SQSTM1 gene are best known for causing some inherited cases of Paget disease of bone, and the SQSTM1 gene and Paget disease of bone are closely linked in genetic medicine. People who carry a pathogenic variant may develop changes in bone that affect shape, strength, or pain, although symptoms can vary widely from one person to another. Rare variants in the SQSTM1 gene have also been associated with amyotrophic lateral sclerosis and frontotemporal dementia in some families and study groups.
A variant is not necessarily a diagnosis
Genetic variants are a common and expected part of human biology. Across the general population, most have no 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 definite diagnosis, especially when several genes and environmental factors also contribute. 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?
Risk linked to the SQSTM1 gene can vary depending on the exact gene change and your family history. For some related conditions, age and other inherited or non-inherited factors may also play a part, but there is not yet broadly confirmed evidence on specific steps that clearly increase or reduce risk for SQSTM1-related disease.
Inheritance of SQSTM1 variants
How SQSTM1 gene variants are inherited depends on the specific condition involved. For the best known SQSTM1-related condition, Paget disease of bone, inheritance is usually autosomal dominant, which means a parent carrying a disease-causing variant can pass it to each child with a 50% chance. Some other rare conditions linked to the SQSTM1 gene have been described with autosomal recessive inheritance, meaning a child would need to inherit one changed copy from each parent.
What does my SQSTM1 result mean for my family?
For the main health conditions linked to the SQSTM1 gene, the pattern in families is usually dominant, which means close relatives such as parents, brothers, sisters, and children may also carry the same gene change. In practical terms, each child of someone with a disease-causing SQSTM1 variant can have a 1 in 2, or 50%, chance of inheriting it. Not everyone who inherits a SQSTM1 variant will develop symptoms, and severity can vary within the same family.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the SQSTM1 gene, SQSTM1 genetic testing usually analyzes DNA from a blood or saliva sample. A lab reads the gene's code and compares it with known variants to see whether a change is present and whether it is linked to health conditions.
When should I consider getting a genetic test?
Genetic testing for the SQSTM1 gene may be worth discussing if you or close relatives have Paget disease of bone, especially at a younger age or in several family members. It can also come up in some families affected by ALS or a form of early dementia that changes behavior and language.
A genetic result is only one part of your health story
A genetic finding can provide useful insight, but how much it explains varies by the condition and the type of variant involved. Many factors, including lifestyle, environment, age, and medical history, influence how the body functions over time. In some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is best 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 help place personal experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in genes can change how the body breaks down a drug, moves it through the body, or responds to it at its target, so the same treatment may work better for one person than another. This is common and can influence how much benefit someone gets from a medicine or how sensitive they are to side effects.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can shape a person’s response to medication. It studies the relationship between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes affect both how strongly a drug works and how the body processes it. This understanding can support treatment decisions that are more informed and more individualized. You can learn more about this topic in LearnHub.
Drugs influenced by the SQSTM1 gene
When should I seek medical advice?
There isn't yet a broadly confirmed role for this gene in guiding medication response, so questions about symptoms, side effects, or how well a treatment is working are best discussed with your doctor. Your doctor can review your medicines and overall health together.
History
In the 1990s, researchers identified p62, the protein later tied to the SQSTM1 gene, during studies of cell signaling and protein buildup. The gene drew wider medical attention in 2002, when variants in the SQSTM1 gene were linked to Paget disease of bone, helping explain why some families shared the condition. From these first observations, research expanded steadily. Later studies connected the SQSTM1 gene to some cases of amyotrophic lateral sclerosis and frontotemporal dementia, which broadened its place in neurology as well as bone health. Over time, scientists’ understanding of the gene’s importance changed as evidence connected it to several long studied inherited conditions.