The WDR45 gene helps your cells recycle worn out parts, a cleanup process that is especially important in the brain. When this gene does not work properly, damaged material can build up inside cells and affect how nerve cells grow and function. This gene plays an important role in keeping brain cells healthy, so harmful variants can lead to developmental delay, seizures, and later movement and thinking problems. WDR45 variants are best known for causing BPAN, a rare genetic condition.
What is a gene?
Genes are sections of DNA that hold instructions your cells use to make molecules or manage processes in the body. Some genes give the directions for producing proteins, which act as the working parts of cells. Other genes mainly help regulate when certain processes happen, where they take place, and how strongly they operate. Together, genes shape how the body develops and functions, and they can also influence how you respond to food, stress, or medications. To explore this topic in greater detail, you can find more in the LearnHub.
Overview
WDR45Gene function
What if the gene works
The WDR45 gene helps cells recycle old parts through autophagy, the cell’s cleanup system. This supports normal cell balance and is especially important for healthy brain cells.
Risk
What if the gene does not work
Variants in the WDR45 gene most often cause a condition with childhood developmental delay and seizures, followed later by movement problems and cognitive decline. Milder or more severe variants can affect when symptoms begin and how strongly they appear.
Treatment
What does that mean for your treatment
A pathogenic or loss-of-function variant in the WDR45 gene does not currently lead to a WDR45-specific treatment or drug choice. Care is based on symptoms, using standard medicines and therapies for seizures, movement symptoms, sleep, and daily function. Early research is exploring treatments aimed at iron handling and the cell cleanup pathway linked to the WDR45 gene, but none are established care yet.
Conditions associated with WDR45
Gene function
What if the gene works
Your cells use the WDR45 gene as part of their built in recycling system. It helps form small membrane sacs that gather worn out proteins and cell parts for breakdown and reuse. This steady cleanup is central to how the WDR45 gene supports cell recycling and everyday cell balance.
The WDR45 gene helps your cells start autophagy, a cleanup process that collects worn out proteins and cell parts. This keeps the inside of the cell orderly and makes stored materials available for reuse.
Its protein attaches to certain membrane fats that mark where recycling sacs should grow. This helps the cell place its cleanup machinery in the right spot at the right time.
Inside your cells, this protein helps the early recycling membrane expand around material due for breakdown. It works with partner proteins so the sac can grow into a closed container.
What is a variant?
A genetic variant is a minor difference in the DNA sequence of a gene. These changes are common and are part of normal human diversity, including differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not cause any noticeable effect and simply represent natural genetic variation. Sometimes, however, a variant can change how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Many WDR45 gene variants reduce or stop production of WIPI4, a protein needed for autophagy (the cell’s recycling system). More disruptive changes, especially variants that shorten the protein, often have the biggest effect and can leave cells less able to clear worn-out material. Some milder WDR45 gene variant effects allow partial activity, which may influence how strongly the condition shows up and, in some cases, when BPAN features begin.
How variants are linked to conditions
Pathogenic variants in the WDR45 gene cause beta-propeller protein-associated neurodegeneration, often called BPAN. This rare WDR45 gene condition usually starts in childhood with developmental delay and limited speech, and some people also have seizures or features similar to autism. Later, many develop changes in movement and thinking, including parkinsonism and dementia. Most cases happen for the first time in a family, though family inheritance can occur.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of human biology, and they 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 definitive diagnosis, especially when several genes and environmental factors also play a role. 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?
For WDR45, risk is mainly determined by whether a disease-causing change in the gene is present, and there is not enough evidence to say that lifestyle or environmental factors change the chance of developing the condition. Family history can matter when the change is inherited, but many cases happen for the first time in the affected child.
Inheritance of WDR45 variants
Variants in the WDR45 gene are inherited in an X linked dominant pattern. A parent carrying a disease causing variant can pass it to any child, but because the WDR45 gene is on the X chromosome, the effects and severity can differ between daughters and sons. Many people with a WDR45 related condition have a new, de novo variant that was not inherited from either parent. In family discussions about WDR45 inheritance, this means the condition may appear for the first time in one person or be passed from an affected parent to a child.
What does my WDR45 result mean for my family?
For WDR45, the main family pattern is X-linked, which means close relatives on the mother’s side may also carry the same change. A parent with the variant can pass it on to a child, so parents, siblings, and children may want to discuss whether the result could be relevant for them. Many WDR45 cases happen as a new change in the child, so a parent may not have it.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for WDR45 variants uses a blood sample, saliva sample, or cheek swab to look for changes in the WDR45 gene. A lab reads the DNA code, either in just this gene or across many genes at once, to see whether a variant that may explain symptoms is present.
When should I consider getting a genetic test?
Testing for changes in the WDR45 gene may be worth considering in children or adults with unexplained developmental delay, seizures, or movement problems, especially if brain scans suggest iron buildup in deep parts of the brain. It can also help clarify a family history of a rare brain condition called BPAN.
A genetic result is only one part of your health story
A genetic result can be helpful, but what it can tell you depends on the condition and on the kind of variant involved. Over time, many factors shape how the body functions, including lifestyle, environment, age, and medical history. For some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is best 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. This helps explain why the same treatment works well for one person, seems less effective for another, or causes more side effects in someone else. Differences in how the body absorbs, breaks down, and uses a drug are common, and they can influence both how well a medicine works and how sensitive a person is to it.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can shape a person’s response to medications. It focuses on links between genes and drugs to better explain why the same treatment may work differently from one person to another. For many medicines, genes affect both how strong a drug’s effect is and how the body processes it. This information can help support treatment choices that are more informed and more individualized. More on this topic is available in the LearnHub.
Drugs influenced by the WDR45 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting how medicines will work, so questions about side effects, treatment changes, or new symptoms are best discussed with your doctor or pharmacist.
History
For many years, doctors described children and adults with a rare pattern of developmental changes followed later by movement problems, but the cause remained unclear. In 2012, researchers identified the WDR45 gene as the cause of this condition, now known as beta propeller protein associated neurodegeneration, or BPAN. This discovery marked an important step for families because it linked a previously puzzling clinical picture to a single gene. Initially understood only through visible traits, later recognized as tied to a specific gene, BPAN also became one of the better known forms within a group of conditions involving iron buildup in the brain. From these first observations, research expanded steadily. Today, the WDR45 gene is recognized as a key part of that history.