The ADGRL1 gene helps nerve cells connect and pass signals, especially at synapses, the contact points where brain cells communicate. If it does not work well, brain signaling may be less organized, which can play a role in attention, behavior, or other neurodevelopmental features in some people. The protein made by this gene helps your cells respond to signals at the cell surface and supports communication between brain cells. It is also well known in neuroscience because its protein can bind a toxin from black widow spider venom.
What is a gene?
A gene is a stretch of DNA that gives your cells instructions they can use to make molecules or manage processes in the body. Some genes carry the directions for producing proteins, the parts of cells that do much of their work. Others mainly regulate when certain processes occur, where they take place, and how strongly they run. Together, genes shape 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 find more in the LearnHub.
Overview
ADGRL1Gene function
What if the gene works
The ADGRL1 gene helps nerve cells connect and signal, especially in the brain. Its protein sits on the cell surface and supports communication between cells at contact points called synapses.
Risk
What if the gene does not work
Variants in the ADGRL1 gene can range from milder to more severe changes. When this gene works less well, cell adhesion and signaling at nerve cell connections may be altered, changing how cells communicate.
Treatment
What does that mean for your treatment
No treatment or drug choice is currently based on pathogenic variants in the ADGRL1 gene in clinical guidelines. The ADGRL1 gene is being studied in brain and cancer research as a possible biomarker or drug target, but this has not yet changed standard care.
Conditions associated with ADGRL1
Gene function
What if the gene works
In the brain and nerves, the ADGRL1 gene helps cells recognize and connect with each other. Its protein sits on the cell surface, where it links nearby cells and passes signals inward. This is a core part of how the ADGRL1 gene works in nerve cells and supports steady communication at synapses, the contact points where nerve cells exchange messages.
The ADGRL1 gene helps neighboring cells attach in a controlled way. Its protein binds partner proteins on nearby cells, which helps cells recognize the right contacts.
In nerve tissue, the ADGRL1 gene supports the formation and organization of synapses. These are the tiny meeting points where one nerve cell passes a message to the next.
After contact is made at the cell surface, the ADGRL1 protein can send signals into the cell. This helps nerve cells adjust their activity and keep communication coordinated.
What is a variant?
A genetic variant means there is a small change in the DNA sequence of a gene. These changes are common and help explain normal human diversity, including differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not have any noticeable effect and are simply part of natural genetic variation. In some situations, though, 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
Changes in the ADGRL1 gene can alter how the receptor is folded, cut into its mature form, moved to the cell surface, or linked to signaling partners. The effects of variants in the ADGRL1 gene on protein function range from mild shifts in signaling or binding to more severe variants that create an unstable, shortened, or absent receptor. This severity spectrum can shape how strongly cell to cell communication is affected.
How variants are linked to conditions
Right now, the ADGRL1 gene does not have a broadly confirmed link to a specific health condition, although research on ADGRL1 gene variants and disease risk is still developing. If you have a reported variant in the ADGRL1 gene or an ADGRL1-related finding on genetic testing, your doctor or genetic counselor can explain what that result means for you and your family.
A variant is not necessarily a diagnosis
Variants in genes are a routine part of human biology and are common across the general population. Most have no direct impact 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 certain diagnosis, especially when several genes and environmental factors 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?
There is not yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the ADGRL1 gene. ADGRL1 has been studied in areas such as brain and behavior, but any effect on risk appears to depend on many other genes and life factors as well.
Inheritance of ADGRL1 variants
There is not yet a broadly confirmed Mendelian inheritance pattern tied to a specific condition for the ADGRL1 gene, so understanding how ADGRL1 gene variants are inherited is still evolving. The ADGRL1 gene is located on chromosome 19, which is an autosome, so you inherit one copy of the ADGRL1 gene from each parent. Any health effect linked to an ADGRL1 variant depends on the specific change and on what future research confirms.
What does my ADGRL1 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific health condition for ADGRL1, though this can change as research develops. If you have a specific ADGRL1 result and want to understand what it could mean for relatives, a doctor or genetic counselor can help explain it in the context of your family history.
Genetic information
Genetic testing
How you find out about variants
To look for changes in the ADGRL1 gene, labs use genetic testing on a blood sample, saliva, or cheek swab. ADGRL1 genetic testing usually reads the gene's DNA code as part of a multigene panel, exome, or genome test, then compares it with a reference sequence to identify and classify variants.
When should I consider getting a genetic test?
There is not yet a broadly established, ADGRL1-specific clinical reason for genetic testing in routine care. Testing decisions are usually based on your symptoms, medical findings, and family history, and are best discussed with a doctor or genetic counselor.
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. Factors such as 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 offers context rather than certainty and is best understood as one part of overall care. In other situations, it may give a clear answer. In areas like medication response, genetic results can also help put individual experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in genes can change how the body breaks down a drug, moves it through the body, or responds to it at its target. This helps explain why the same treatment works well for one person, seems weaker for another, or causes more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It studies links between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes can influence how strongly a drug works or how the body handles it. This information can support more informed and more individualized treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the ADGRL1 gene
When should I seek medical advice?
There is no broadly confirmed role for this gene in guiding medication choice or response at this time. Questions about side effects, how well a medicine is working, or how treatment fits your overall health are best discussed with your doctor or pharmacist.
History
ADGRL1 first drew scientific attention in the 1990s, when researchers studying black widow spider venom identified a nerve cell surface protein that the toxin could bind to. It was originally named latrophilin 1, reflecting that discovery. From these first observations, research expanded steadily. As gene naming systems became more standardized, it was later renamed the ADGRL1 gene, short for adhesion G protein-coupled receptor L1. That change marked a broader shift in genetics, where genes were grouped by shared structure rather than older discovery-based names. Its history is mainly tied to laboratory research in neuroscience, rather than to a widely known public health story.