The KIF23 gene gives cells instructions for a protein that helps them finish dividing into two new cells. This gene plays an important role in growth and tissue repair because cells depend on this final split to work normally. If the KIF23 gene does not work properly, cell division can go off track, which may affect early development and, in some people, blood cell production. Pathogenic variants in this gene have been linked to rare inherited conditions that can include developmental differences or anemia.
What is a gene?
Genes are stretches of DNA that carry instructions your cells use to make molecules or regulate what happens in the body. Some genes provide the directions for producing proteins, which do much of the work inside cells. Others mainly control when certain processes happen, where they happen, and how active they are. Together, genes affect how the body develops and works, and they can also influence how you respond to food, stress, or medications. More information on this topic is available in LearnHub.
Overview
KIF23Gene function
What if the gene works
The KIF23 gene helps cells finish dividing by organizing the machinery that separates one cell into two. This supports normal growth, tissue repair, and early development.
Risk
What if the gene does not work
Variants in the KIF23 gene are known for causing congenital dyserythropoietic anemia type III, with abnormal red blood cell development and anemia that can be mild or more marked. Milder and more severe variants may influence onset and blood findings.
Treatment
What does that mean for your treatment
No KIF23-specific treatment or drug choice approach is currently established for pathogenic variants in the KIF23 gene. The KIF23 gene is being studied in cancer research as a possible biomarker and drug target, but this has not led to guideline-based treatment use.
Gene function
What if the gene works
Cell division depends on careful timing and movement inside each cell. The KIF23 gene helps guide the last steps of this process, when one cell finishes splitting into two. Understanding the KIF23 gene’s function helps you see how new cells separate in a controlled, orderly way.
This gene helps position the machinery that pinches one dividing cell into two. This is a core part of the KIF23 gene’s function in cell division, especially during the final split.
The KIF23 gene helps organize microtubules, the tiny protein tracks that shape and move parts inside cells. This keeps the center of a dividing cell steady while separation is being completed.
Its protein works with partner proteins to mark where the cell should narrow and divide. That guidance helps the split happen in the right place and at the right time.
What is a variant?
A genetic variant is a minor change in the DNA sequence of a gene. These changes are common and play a part in normal human diversity, including differences in appearance, metabolism, and how the body responds to environmental influences. Many variants do not have any noticeable effect and simply represent natural genetic variation. In some situations, though, a variant can change a gene's function more significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the KIF23 gene can change how well the protein folds, binds to microtubules (the cell’s internal support fibers), or works with partner proteins during the final split between two cells. Milder variants may partly reduce protein stability or movement, while more severe variants can cause marked loss of function or keep it from reaching the right place in the dividing cell. This can leave some cells unable to separate fully, leading to unusually large cells or cells with more than one nucleus.
How variants are linked to conditions
Pathogenic variants in the KIF23 gene can cause congenital dyserythropoietic anemia type III, a rare inherited anemia. People with this condition may have ongoing anemia, an enlarged spleen, or iron overload over time. The link between the KIF23 gene and congenital dyserythropoietic anemia type III is uncommon but well established.
A variant is not necessarily a diagnosis
Genetic variants are a routine feature of human biology and are common across the general population. Most do not directly affect health and simply contribute to natural human diversity. For many genes, having a variant associated with a condition indicates a possible link rather than a certain diagnosis, especially when multiple genes and environmental factors play a role. In some situations, though, a single 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 isn't yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the KIF23 gene. If a change in KIF23 has been found in your family, a doctor or genetic counselor can help explain what it may mean for your personal risk.
Inheritance of KIF23 variants
KIF23-related congenital dyserythropoietic anemia type III follows an autosomal recessive inheritance pattern. In practical terms, how KIF23 variants are inherited usually means a child receives one altered copy of the KIF23 gene from each parent, while parents with one altered copy are typically carriers. When both parents are carriers, each pregnancy has a 25% chance of the child inheriting both altered copies, a 50% chance of being a carrier, and a 25% chance of inheriting neither altered copy. Because the KIF23 gene is on chromosome 15, inheritance is generally the same for boys and girls.
What does my KIF23 result mean for my family?
For KIF23, the best-established family pattern is a dominant one linked to a rare inherited anemia. That means a parent, brother, sister, or child may also carry the same gene change, so close relatives can sometimes have related blood findings even if symptoms differ. Family implications depend on the exact KIF23 result and the condition it is linked to in your family.
Genetic information
Genetic testing
How you find out about variants
To look for changes in the KIF23 gene, doctors use KIF23 genetic testing on a blood or saliva sample. The lab reads the gene’s DNA code to check for variants and may include KIF23 in a broader gene panel. Results can show a pathogenic variant, a benign variant, or an unclear finding.
When should I consider getting a genetic test?
Consider talking with your doctor about KIF23 testing if you or your child has a rare inherited anemia with abnormal red blood cell development, especially if it runs in the family. Finding a disease-causing KIF23 change can help confirm the diagnosis and support family testing.
A genetic result is only one part of your health story
Genetic test results can provide meaningful information, but how much they reveal depends on the condition and the kind of variant involved. Many other factors, including lifestyle, environment, age, and medical history, also shape how the body works over time. For some conditions, especially those influenced 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 may offer a clear answer. In areas such as 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 happens because the body can absorb, break down, transport, or react to a drug differently from one person to another. These differences are common and can influence how well a treatment works or how likely someone is to notice side effects.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can affect a person’s response to medicines. It focuses on connections between genes and medications to better explain why the same treatment may work differently from one person to another. For many drugs, genes can influence both how strongly a medicine works and how the body processes it. Understanding this can support treatment decisions that are more informed and more individualized. More detailed information on this topic is available in the LearnHub.
Drugs influenced by the KIF23 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication response, so questions about medicines, side effects, or changes in your health are best discussed with your doctor.
History
KIF23 entered the scientific literature during the rapid expansion of research on cell division in the 1990s, when scientists were identifying members of the kinesin family of genes. It was first studied mainly in laboratory models, where it drew attention for its part in the final stages of cell division. From these first observations, research expanded steadily. As chromosome studies and later DNA sequencing became more common, changes in the KIF23 gene were linked to a rare inherited condition affecting brain growth and development. That connection moved KIF23 from basic cell biology into clinical genetics. Today, its history reflects a common path in genetics: a gene first explored in the lab later became important for understanding human health.