BICRA helps control which genes are switched on or off as the brain and body develop. If the BICRA gene does not work properly, early development can be disrupted, and some people have delayed speech and movement skills, learning difficulties or intellectual disability, low muscle tone, and sometimes feeding or growth issues. Pathogenic variants in this gene are linked to a rare neurodevelopmental condition.
What is a gene?
Genes are stretches of DNA that hold instructions your cells use to make molecules or manage activities in the body. Some genes carry the directions for producing proteins, which are the parts of cells that do much of the work. Other genes mainly regulate when certain processes happen, where they happen, and how active they are. Taken together, genes affect how the body develops and works, and they can also influence how you respond to food, stress, or medications. For a deeper look at this topic, you can learn more in the LearnHub.
Overview
BICRAGene function
What if the gene works
The BICRA gene helps organize how DNA is packaged, which supports turning other genes on or off at the right time. This is important for normal growth, brain development, and cell function.
Risk
What if the gene does not work
Changes in the BICRA gene are linked to developmental delay, speech and learning difficulties, often with growth differences and distinctive facial features. Effects can range from milder to more severe neurodevelopmental needs.
Treatment
What does that mean for your treatment
No BICRA-specific treatment or drug selection approach is currently established for people with a pathogenic or loss-of-function variant in the BICRA gene.
Gene function
What if the gene works
Inside your cells, the BICRA gene helps control how easily certain stretches of DNA can be read. Its protein works as part of a larger team that adjusts DNA packaging, so the right instructions are available at the right time. Understanding how the BICRA gene works helps explain how cells manage everyday gene activity.
The BICRA gene helps cells loosen or shift DNA packaging so important instructions can be reached. This makes it easier for the cell’s reading machinery to use the right genes when needed.
Its protein helps control which genes are more active and which stay quieter in a given cell. That steady control supports normal cell identity and day to day function.
The protein made from the BICRA gene works within a remodeling complex (a protein team that repositions DNA packaging). It helps that team work with other proteins at active DNA regions, keeping gene use coordinated.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These changes are common and help account for 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 can change how a gene functions more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Changes in the BICRA gene can alter the shape or stability of its protein, making it harder to join the cell machinery that controls which genes are switched on. How BICRA gene variants affect protein function can vary: some missense variants may only partly weaken protein interactions, while more disruptive variants can sharply reduce or stop the protein from working. Greater loss of function is linked to earlier and more noticeable developmental differences in some people.
How variants are linked to conditions
Pathogenic variants in the BICRA gene can cause Coffin-Siris syndrome 12, a rare neurodevelopmental condition. People with this BICRA gene condition often have developmental delay, speech and language difficulties, and varying degrees of intellectual disability. Some also have short stature, feeding problems, or distinctive facial features, and the effects can vary from person to person.
A variant is not necessarily a diagnosis
Variants in genes are a normal feature of human biology and are common throughout the general population. Most do not directly affect 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 contribute. In some situations, however, one well understood 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 BICRA gene. In families affected by a BICRA-related condition, risk is mainly tied to the gene change itself rather than lifestyle or everyday exposures, and a doctor or genetic counselor can help explain personal and family risk.
Inheritance of BICRA variants
BICRA gene variants linked to BICRA related neurodevelopmental conditions are inherited in an autosomal dominant pattern. This means a child can have the condition if they inherit one altered copy of the BICRA gene from an affected parent, and each child of that parent has a 50% chance of inheriting it. Some people have a new, de novo variant in the BICRA gene, meaning it started in them and was not inherited from either parent.
What does my BICRA result mean for my family?
A disease-causing change in the BICRA gene is usually linked to a dominant pattern, so close relatives such as parents, siblings, and children may also carry the same change and may want to discuss family testing. In many families, the change happens for the first time in the affected person, so a parent is not always the source. The exact meaning for relatives depends on whether the result is confirmed to be disease-causing.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the BICRA gene, doctors use BICRA genetic testing on a blood sample, saliva, or cheek swab. A lab reads the gene’s DNA code and compares it with the usual sequence to identify variants that may help explain a diagnosis or clarify whether a change runs in a family.
When should I consider getting a genetic test?
You may want to consider BICRA testing if a child has unexplained developmental delay, speech delay, learning problems, low muscle tone, or features suggesting a rare genetic condition. It can also help when there is a family history of similar developmental concerns.
A genetic result is only one part of your health story
A genetic finding can provide useful insight, but how much it reveals depends on the condition and the type of variant involved. Many factors, including lifestyle, environment, age, and medical history, influence how the body works over time. For some conditions, especially those shaped 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 can offer a clear answer. In areas such as medication response, these results can also help place personal experiences in 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 and have different results because their bodies may absorb, break down, or respond to a drug in different ways. This is a common part of human biology, and it can influence how well a medicine works or how sensitive someone is to side effects.
What is Pharmacogenetics?
Pharmacogenetics looks at how differences in genes can shape a person’s response to medication. 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 may affect how strongly a drug works or how the body handles it. This information can support treatment decisions that are more informed and more individualized. To learn more about this topic, more information is available in the LearnHub.
Drugs influenced by the BICRA gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how medicines work, so questions about side effects, starting a new treatment, or changing medication are best discussed with your doctor.
History
The BICRA gene first came to attention through cancer research, when scientists studying a chromosome 19 region linked to brain tumors identified it as a candidate gene. Early reports used the name GLTSCR1, reflecting that discovery context. Over time, descriptions became more precise, and researchers recognized that this gene belonged to a broader group of genes involved in controlling how DNA is used inside cells. As genetic studies refined the picture, the BICRA gene was also linked to a neurodevelopmental condition in some children, which expanded interest beyond tumor biology. This shift from a cancer candidate to a gene with a wider medical role shaped today’s understanding of BICRA.