The WDR55 gene helps cells build ribosomes, the tiny structures that make the proteins your body needs to grow and develop. When this gene does not work properly, cells may have trouble growing and dividing in a steady way, especially early in life. People with pathogenic variants in both copies of the WDR55 gene can have a rare inherited condition linked to poor growth, a smaller head size, developmental delay, and other differences present from birth. This is not a widely known gene outside genetics and rare disease care.
What is a gene?
Genes are sections of DNA that carry instructions your cells use to make molecules or to control processes in the body. Some genes provide the instructions for making proteins, the parts of cells that do the work. Others mainly help determine when certain processes happen, where they happen, and how strongly they take place. Together, genes affect how the body develops and functions, and they can influence how you respond to food, stress, or medications. For a deeper look at this topic, you can learn more in the LearnHub.
Overview
WDR55Gene function
What if the gene works
The WDR55 gene helps cells build ribosomes, the structures that make proteins. This supports normal cell growth, division, and early development.
Risk
What if the gene does not work
Milder to more severe variants in the WDR55 gene can reduce how well cells make ribosomes, the structures that build proteins. This may disrupt nucleolar function and slow normal cell growth and division.
Treatment
What does that mean for your treatment
At present, no treatment or management approach is specifically established for pathogenic or loss-of-function variants in the WDR55 gene; treatment decisions are guided by the person’s symptoms and standard care for the condition involved.
Gene function
What if the gene works
Every day, your cells need a steady supply of proteins to grow, repair, and renew themselves. In simple terms, the WDR55 gene function is closely tied to ribosome production inside your cells. Most of this work takes place in the nucleolus, a small area within the nucleus.
WDR55 helps your cells put together ribosomes in the nucleolus. These structures read genetic instructions and turn them into proteins your body uses every day.
Before a ribosome is ready, cells must cut and shape a starter RNA into the right pieces. The WDR55 gene supports this processing so the parts mature in the correct order.
By helping make ribosomes, this gene supports steady protein production for normal cell activity. That gives growing and dividing cells the tools they need for routine maintenance and renewal.
What is a variant?
A genetic variant is a small change in a gene’s DNA sequence. These changes are common and are part of normal human diversity, including differences in appearance, metabolism, or the way the body reacts to environmental influences. Many variants do not have any noticeable effect and simply represent natural genetic variation. In some cases, though, a variant can change how a gene functions to a greater extent and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
How variants influence the WDR55 gene's function often comes down to how much working WDR55 protein a cell can make and whether that protein can reach the nucleolus, the part of the cell where ribosomes are assembled. Milder variants may partly alter the protein’s shape or stability, so some activity remains. More severe variants can greatly reduce protein production or disrupt important WD repeat regions, which may weaken protein interactions and interfere with ribosome-building pathways.
How variants are linked to conditions
At this time, the WDR55 gene does not yet have a broadly confirmed link to a specific health condition, and research on conditions linked to WDR55 gene variants is still developing. Anyone with a confirmed WDR55-related diagnosis should rely on guidance from their doctor or genetic counselor rather than general information.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are widespread in 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 points to a possible link rather than a definite diagnosis, especially when several genes and environmental factors are involved. 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 health risk related to the WDR55 gene. If a change in WDR55 has been found in you or your family, a doctor or genetic counselor can help explain what it may mean for your personal risk.
Inheritance of WDR55 variants
There is not yet a broadly confirmed inheritance pattern tied to a specific WDR55-related condition, so how WDR55 gene variants are inherited in a disease setting is still being clarified. WDR55 is located on chromosome 5, which is an autosome rather than a sex chromosome. That means you inherit copies of the WDR55 gene from both parents, regardless of whether you are male or female.
What does my WDR55 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific condition for WDR55, although this may become clearer as research develops. If you have a WDR55 result and want to understand what it could mean for relatives, a doctor or genetic counselor can help put that result in the right family context.
Genetic information
Genetic testing
How you find out about variants
Variants in the WDR55 gene are found through genetic testing, usually using a blood or saliva sample. This is how WDR55 genetic testing works: a lab reads the WDR55 gene’s DNA code and compares it with the usual sequence to look for variants. Results may show a variant linked to disease, a harmless change, or an uncertain finding.
When should I consider getting a genetic test?
There is not yet a broadly established reason to test the WDR55 gene on its own in routine care. Genetic testing decisions are usually based on your symptoms, medical findings, and family history, and are best made with a doctor or genetic counselor.
A genetic result is only one part of your health story
Genetic results can provide useful insight, but how much they explain varies based on the condition and the type of variant involved. Over time, how the body works is also shaped by factors such as lifestyle, environment, age, and medical history. For some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is most helpful when 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 help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body responds to medicines. This can change how quickly a drug is processed, how strongly it works, or how sensitive you are to side effects. Differences like these are common, which helps explain why the same treatment can work well for one person but less well for another.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can affect the way a person responds to medications. It looks at gene and drug patterns to better understand why the same treatment may work differently from one person to another. For many medicines, genes influence how strongly a drug works or how the body handles it. This information can help support treatment decisions that are more informed and more individualized. More details on this topic are available in the LearnHub.
Drugs influenced by the WDR55 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting how medicines will work or what side effects they may cause, so any questions about a treatment, a new symptom, or a medication change are best discussed with your doctor or pharmacist.
History
In the early 2000s, the WDR55 gene was cataloged as human genome sequencing expanded and many previously unnamed genes were being mapped. Initial reports placed it in the WD repeat family, a group of genes identified by shared structural features. From these first observations, research expanded steadily. Later laboratory studies helped clarify where the WDR55 gene fits in human biology and in early development research. Its history has been shaped more by steady scientific work than by a single landmark public event. Over time, descriptions became more precise as gene databases, sequencing projects, and experimental studies refined what researchers knew about the WDR55 gene.