The MAPRE2 gene helps cells organize microtubules, the tiny internal fibers that support cell shape, movement, and division. If it does not work properly, cells may not grow or move in the usual way during early development, which can affect the brain, face, skin, and bones. This gene plays an important role in development, and pathogenic variants in the MAPRE2 gene are linked to a rare condition that can include developmental delay, intellectual disability, short stature, and distinctive physical features.
What is a gene?
Genes are stretches of DNA that give cells instructions for making molecules or managing processes in the body. Some genes carry the code for proteins, which do much of the cell's work. Others are mostly involved in regulating when certain processes 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 respond to food, stress, and medicines. More detail on this topic is available in the LearnHub.
Overview
MAPRE2Gene function
What if the gene works
The MAPRE2 gene helps organize microtubules, the cell's internal tracks. This supports cell shape, movement, and division, especially during early development.
Risk
What if the gene does not work
Variants in the MAPRE2 gene are linked to a rare developmental condition with skin creases, distinctive facial features, growth or bone differences, and developmental delay. Milder or more severe variants can influence which features appear and how pronounced they are.
Treatment
What does that mean for your treatment
No MAPRE2-specific treatment or management approach is currently established, so care is based on the person’s symptoms and daily needs rather than on a drug choice linked directly to a pathogenic or loss-of-function variant in the MAPRE2 gene.
Conditions associated with MAPRE2
Gene function
What if the gene works
Inside your cells, the MAPRE2 gene helps manage microtubules, the tiny tracks that give cells shape and guide movement inside them. Its protein gathers at the growing ends of these tracks, where it helps them extend, pause, and connect with other cell parts in an orderly way. Understanding how the MAPRE2 gene works helps explain how cells stay organized as they grow and divide.
The MAPRE2 gene helps control microtubules, the tiny tracks that support cell shape and movement inside cells. Its protein gathers at the fast growing ends and helps those ends grow in a steady, coordinated way.
Its protein also acts like a meeting point at microtubule tips. This lets other proteins join at the right spot so cells can organize their internal scaffolding and connect it to nearby structures.
By guiding where microtubules extend, the MAPRE2 gene helps cells keep an organized layout. This supports cell shape, positioning of cell parts, and the sense of direction cells use as they move or develop.
During cell division, its protein helps organize the spindle, the set of fibers that separates DNA into two new cells. This supports orderly division as cells copy and share their genetic material.
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, including differences in appearance, metabolism, and how the body responds to environmental influences. Many variants have no noticeable effect and are simply part of natural genetic variation. Sometimes, 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
Studies of how MAPRE2 gene variants affect protein function show changes in the protein's shape, stability, or ability to attach to microtubules, the cell's internal support fibers. Some variants cause a milder shift in this binding, while more disruptive variants can greatly reduce usable protein or distort this interaction more strongly. In people with conditions linked to variants in the MAPRE2 gene, this range in functional impact may help explain why features and their severity can differ.
How variants are linked to conditions
Pathogenic variants in the MAPRE2 gene cause a rare condition called congenital symmetric circumferential skin creases, sometimes called Kunze type, and this is the main answer to how MAPRE2 variants are linked to conditions. People with this diagnosis may have ring-like skin folds, short stature, distinctive facial features, and developmental delay or intellectual disability. Reported features can vary from one person to another.
A variant is not necessarily a diagnosis
Genetic variants are a normal feature of human biology and are common across 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 indicates a possible link rather than a definite diagnosis, especially when multiple genes and environmental factors also play a part. 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 risks related to the MAPRE2 gene. Anyone with concerns about personal or family risk can discuss it with a doctor or genetic counselor.
Inheritance of MAPRE2 variants
MAPRE2-related conditions can follow more than one inheritance pattern, so the MAPRE2 inheritance pattern depends on the specific condition and variant. Some are autosomal dominant, which means one changed copy of the MAPRE2 gene can be enough, and each child of an affected parent has a 50% chance of inheriting it; some cases also result from a new variant not inherited from either parent. Other reported MAPRE2-related presentations are autosomal recessive, meaning a child inherits one altered copy from each parent, while carrier parents are usually unaffected.
What does my MAPRE2 result mean for my family?
MAPRE2-related conditions are usually passed down in a dominant way, so a parent, child, brother, or sister may also carry the same gene change. This means close relatives may want to learn whether the result is present in them too. In some families, the change is new in the affected person and was not inherited from either parent.
Genetic information
Genetic testing
How you find out about variants
Doctors look for changes in the MAPRE2 gene with genetic testing for MAPRE2 variants, usually using a blood sample or saliva. A lab reads the DNA code in the gene and compares it with the usual sequence to see whether a variant is present; results may show a known variant, no relevant variant, or a variant of uncertain significance.
When should I consider getting a genetic test?
Genetic testing for the MAPRE2 gene may be worth discussing if a baby is born with ring-like skin creases on the arms or legs, especially along with developmental delay, growth differences, or hearing problems. It can also help clarify the cause when similar features run in a family.
A genetic result is only one part of your health story
A genetic result can provide useful insight, but how much it reveals depends on the condition and the kind 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 most useful when considered together with 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 individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. One person may break down a drug more slowly or more quickly than another, which can change how well the treatment works or how likely side effects are. These differences are common and are one reason the same medication can feel very different from person to person.
What is Pharmacogenetics?
Pharmacogenetics is the area of study that looks at how genetic differences affect a person’s response to medicines. It examines gene drug patterns to help explain why the same treatment works differently from one person to another. For many medicines, genes play a part in how strongly a drug works or how the body processes it. This information can help support treatment decisions that are more informed and more individualized. You can read more about this topic in the LearnHub.
Drugs influenced by the MAPRE2 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. For questions about side effects, medication changes, or other health concerns, it is best to speak with your doctor, who can look at the full picture of your symptoms, treatments, and medical history.