The ACKR1 gene helps make a protein on red blood cells and blood vessel lining that binds chemical signals and carries the Duffy blood group marker. If this gene does not work in the usual way, it can change blood type patterns and may lead to lower neutrophil counts, a common finding in some people that usually does not cause illness. This gene plays an important role in how some malaria parasites enter red blood cells, which is why ACKR1 is well known in blood banking and malaria research.
What is a gene?
Genes are sections of DNA that carry instructions your cells use to make molecules or regulate processes throughout the body. Some genes provide the directions for producing proteins, which do much of the cell’s work. Others are used mostly to control when certain processes happen, where they happen, 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, or medicines. For a deeper look at this subject, more information is available in the LearnHub.
Overview
ACKR1Gene function
What if the gene works
The ACKR1 gene helps make the Duffy blood group marker on red blood cells. Its protein also binds chemical signals called chemokines, helping control inflammation and guide white blood cell movement.
Risk
What if the gene does not work
Variants in the ACKR1 gene can lead to the Duffy-null blood type, often causing lifelong lower neutrophil counts without illness and reducing susceptibility to Plasmodium vivax malaria. Milder and more severe variants can affect how strongly these features appear.
Treatment
What does that mean for your treatment
No ACKR1-specific treatment is currently established. Its main treatment relevance is the Duffy-null form of the ACKR1 gene, which can cause a naturally lower neutrophil count; this may change how blood counts are interpreted, including clozapine monitoring, where lower neutrophil thresholds may be used in selected people.
Gene function
What if the gene works
Cells in your blood and blood vessel lining use the ACKR1 gene to handle chemokines (small chemical signals that help direct immune cells). This is part of what the ACKR1 gene does in red blood cells and the lining of small blood vessels every day. Understanding how the ACKR1 gene works can make it easier to see how your body keeps these signals balanced from place to place.
The protein made from the ACKR1 gene sits on the surface of red blood cells and the lining of some blood vessels. It binds a wide range of chemokines so these signals can be carried or held at the cell surface.
On red blood cells, this protein helps hold and release immune signals in the bloodstream. That buffering role helps shape how much of these signals remains free in the blood at a given time.
In the lining of small veins, ACKR1 helps move chemokines from the tissue side to the blood-facing side. This helps display clear directional cues that guide white blood cells to places where they are needed.
What is a variant?
A genetic variant is a minor change in the DNA sequence within a gene. These changes are common and help shape normal human diversity, such as differences in appearance, metabolism, or how the body responds to environmental influences. Many variants do not have any noticeable effect and simply reflect natural genetic variation. In some situations, however, a variant changes how a gene functions more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the ACKR1 gene can change how much of the ACKR1 protein reaches the cell surface or how well it binds signaling proteins called chemokines. The effects of ACKR1 gene variants on protein function range from milder binding changes to more severe variants, including DNA changes that switch off ACKR1 production on red blood cells. Some variants also alter the protein’s shape or stability, which can reduce surface display and change blood group expression.
How variants are linked to conditions
How variants of the ACKR1 gene are linked to conditions is clearest in Duffy-null associated neutrophil count, where routine blood tests show a lower usual neutrophil level. This common pattern is not usually linked to more infections on its own. Certain ACKR1 variants are also associated with protection against one type of malaria, Plasmodium vivax.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are widespread in the general population. Most do not have a direct effect on health and simply contribute to 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 also play a role. In some situations, however, 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?
Risk linked to ACKR1 depends mostly on the specific change a person inherits. One well-known ACKR1 pattern can lower the chance of getting a certain type of malaria, while also being linked to naturally lower white blood cell counts, which can change how routine blood test results are interpreted.
Inheritance of ACKR1 variants
There is not a single broadly confirmed disease inheritance pattern for the ACKR1 gene in the way seen with many classic single gene conditions. Instead, how ACKR1 gene variants are inherited is usually discussed in relation to blood group traits and related findings, which can vary depending on the specific variant combination a person receives from each parent. The ACKR1 gene is on chromosome 1, which is an autosome, so you inherit one copy from your mother and one copy from your father.
What does my ACKR1 result mean for my family?
There is not yet a broadly confirmed single-gene inheritance pattern for ACKR1 tied to a specific inherited health condition in the way seen with some other genes. If you have a specific ACKR1 result and questions about what it could mean for relatives, a doctor or genetic counselor can help explain it in the context of your family and health history.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for ACKR1 variants uses a blood or saliva sample to read changes in the ACKR1 gene. Labs usually use targeted testing or DNA sequencing to look for variants linked to Duffy blood group type or an inherited tendency toward lower neutrophil counts. Results can confirm whether a specific ACKR1 variant is present.
When should I consider getting a genetic test?
ACKR1 testing may be worth discussing if blood tests repeatedly show a low neutrophil count, a type of white blood cell, especially in people with African, Middle Eastern, or Caribbean ancestry who otherwise feel well and do not get frequent infections. It can also help explain a family pattern of low counts.
A genetic result is only one part of your health story
A genetic test result can be informative, but what it can tell you depends on the condition and the kind of variant involved. Lifestyle, environment, age, and medical history also shape how the body functions over time. For some conditions, especially those influenced by many genes, genetic information provides context rather than certainty and is best 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 also 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 is one reason the same medication may work well for one person, work less well for another, or cause different side effects. These inherited differences can change how the body handles a drug and how sensitive your tissues are to it, which can influence both benefit and tolerance.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can shape a person’s response to medications. It studies links between genes and drugs to help explain why the same treatment can work differently from one person to another. For many medicines, genes influence how strongly a drug works or how the body handles it. This understanding can support treatment decisions that are better informed and more individualized. More detail on this topic is available in the LearnHub.
Drugs influenced by the ACKR1 gene
When should I seek medical advice?
There is not yet a well-established role for this gene in guiding medicine choice or dosing. For any concerns about side effects, a new prescription, or unusual blood test results, talk with your doctor.
History
Across cultures and centuries, inherited traits linked to this gene were observed in different ways. Early blood typing work in the 1950s identified the Duffy blood group, which was later tied to the ACKR1 gene. Researchers then noticed that many people in parts of Africa lacked the usual Duffy blood group marker on red blood cells, a pattern linked to protection against Plasmodium vivax malaria. This finding made the ACKR1 gene an important example of how infectious disease can shape human genetics over time. From these first observations, research expanded steadily. The gene also became relevant in transfusion medicine, ancestry studies, and population genetics because its variants differ widely across world populations.