The SHROOM4 gene helps guide how brain cells grow, keep their shape, and form connections. If it does not work properly, brain development can be affected, which may lead to developmental delay, intellectual disability, speech delay, seizures, or behavior differences in some people. This gene plays an important role in keeping the inner scaffolding of nerve cells organized. Variants in the SHROOM4 gene can cause an X linked condition that often affects males more noticeably, though females can also be affected.
What is a gene?
Genes are stretches of DNA that provide cells with instructions for making molecules or directing processes in the body. Some genes hold the information needed to make proteins, the parts of cells that do the work. Others mainly help regulate when certain processes happen, where they take place, and how strongly they operate. Taken together, genes affect how the body develops and works, and they can influence how you respond to food, stress, or medications. You can find more detailed information on this topic in the LearnHub.
Overview
SHROOM4Gene function
What if the gene works
The SHROOM4 gene helps organize the internal scaffolding that gives cells their shape. It is especially active in the brain, where it supports nerve cell development and communication.
Risk
What if the gene does not work
Changes in the SHROOM4 gene are linked to X-linked neurodevelopmental conditions, often with developmental delay, intellectual disability, and speech differences; some people also have seizures. Milder or more severe variants can influence which features appear and how marked they are.
Treatment
What does that mean for your treatment
At present, no treatment or drug choice specific to a pathogenic or loss-of-function variant in the SHROOM4 gene is established. Care is based on a person’s symptoms and usual clinical management, rather than on a medicine chosen specifically for SHROOM4.
Conditions associated with SHROOM4
Gene function
What if the gene works
Many cells, especially brain cells, need a steady internal framework to keep their shape and form connections. The protein made from the SHROOM4 gene helps arrange actin, a protein that supports cell structure and movement. It is especially active in the nervous system, where precise cell shape helps networks form and work normally.
The protein made from the SHROOM4 gene helps arrange actin, one of the main fibers that gives cells internal support. This keeps the cell's framework organized so it can hold its structure.
The SHROOM4 gene helps position other cell-shaping proteins in the right areas of a cell. This coordination is part of what the SHROOM4 gene does to support controlled changes in cell form.
In the nervous system, the SHROOM4 gene supports the stable shape of nerve cells. This helps cells create and maintain the structures they use to connect with nearby cells.
What is a variant?
A genetic variant is a small change in the DNA sequence within a gene. These changes are common and are part of normal human diversity, including differences in appearance, metabolism, and the way the body responds to environmental influences. Many variants do not have any noticeable effect and simply represent natural genetic variation. Sometimes, though, a variant changes how a gene works to a greater degree and can contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the SHROOM4 gene can weaken or disrupt the SHROOM4 protein, changing how cells organize their internal support framework and maintain shape. In practical terms, this is how SHROOM4 gene variants affect protein function, often by making the protein unstable, shortened, or unable to bind its usual partners. Some variants may leave partial activity, while more severe variants can lead to little or no working protein. That range can influence how strongly early brain development is affected.
How variants are linked to conditions
Pathogenic variants in the SHROOM4 gene can cause an X-linked condition that affects learning and development, often described as X-linked intellectual disability or Stocco dos Santos syndrome. People with a SHROOM4 gene related condition may have developmental delay, speech delay, and intellectual disability, and some also have seizures or behavior differences. Because this is a genetic diagnosis, finding a disease-causing variant in the SHROOM4 gene can help confirm the condition in an affected person.
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 instead reflect the natural diversity seen among people. For many genes, carrying a variant associated with a condition indicates a possible link rather than a definite diagnosis, especially when multiple genes and environmental influences play a role. 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 risk related to the SHROOM4 gene. In families with a harmful SHROOM4 change, the main factor affecting risk is whether that change is inherited, so a doctor or genetic counselor can help explain personal and family risk.
Inheritance of SHROOM4 variants
SHROOM4-related conditions are generally described as following an X-linked inheritance pattern. Because the SHROOM4 gene is on the X chromosome, a mother carrying a disease-causing variant can pass it to sons or daughters, while a father passes his X chromosome only to daughters and not to sons. In practical terms, the SHROOM4 gene inheritance pattern often means males are more clearly affected, while females may have milder features or none at all, depending on the specific variant and X chromosome activity in their cells.
What does my SHROOM4 result mean for my family?
SHROOM4 results are usually discussed in the setting of an X-linked condition affecting learning and development. This can mean close relatives on the same side of the family, especially the mother’s side, may also carry the variant or be affected. Brothers, sisters, and other relatives may have different features, from none at all to learning or behavior differences.
Genetic information
Genetic testing
How you find out about variants
To look for changes in the SHROOM4 gene, labs use SHROOM4 genetic testing on a blood sample or saliva sample. The test reads the gene’s DNA code and checks for variants that may help explain developmental or neurologic features, or clarify whether a variant runs in a family.
When should I consider getting a genetic test?
Genetic testing for the SHROOM4 gene may be considered when a child has unexplained developmental delay, speech delay, or intellectual disability, especially if similar concerns run in the family. It can also help when several boys on the mother’s side of the family have learning or developmental problems.
A genetic result is only one part of your health story
A genetic result can provide useful insight, yet how much it explains depends on the condition and the specific type of variant involved. Many factors, including lifestyle, environment, age, and medical history, influence how the body functions over time. For some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is best 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 personal experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Two people can take the same treatment at the same dose and have different results because their bodies may break down, move, or respond to the drug in different ways. This is a common part of human biology and can influence how well a medicine works or how sensitive someone is to side effects. Medication response also depends on other factors, including age, kidney and liver function, and other medicines.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It looks at gene-drug patterns to help explain why the same treatment may work differently from one person to another. For many medicines, genes can influence either how strongly a drug works or how the body processes it. This information can support more informed, personalized treatment decisions. More on this topic is available in the LearnHub.
Drugs influenced by the SHROOM4 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding how medicines are chosen or used, so questions about side effects, new symptoms, or whether a treatment is working are best discussed with your doctor.