The PARP6 gene helps cells control growth and organize the internal scaffolding they use, especially in the developing brain. This gene plays an important role in how nerve cells mature and connect. If it does not work properly, a child may have developmental delay, low muscle tone, seizures, and movement or walking difficulties. Rare harmful variants in the PARP6 gene are linked to a genetic condition that affects brain development and day to day functioning.
What is a gene?
Genes are stretches of DNA that carry instructions your cells use to make molecules or manage processes in the body. Some genes hold the directions for producing proteins, the parts of cells that do much of the work. Others mainly help regulate when certain processes happen, where they take place, and how strongly they run. Taken as a whole, genes affect how the body develops and works, and they can also influence how you respond to food, stress, or medications. For a deeper look at this topic, you can find more in the LearnHub.
Overview
PARP6Gene function
What if the gene works
The PARP6 gene helps cells fine tune other proteins. This supports normal nerve cell development and orderly cell division.
Risk
What if the gene does not work
When the PARP6 gene does not work properly, it can cause a rare neurodevelopmental condition with developmental delay, low muscle tone, and seizures. Milder or more severe variants may affect when symptoms appear and how learning and movement are affected.
Treatment
What does that mean for your treatment
No PARP6-specific treatment or drug choice approach is currently established for people with a pathogenic or loss-of-function variant in the PARP6 gene. PARP6 is being studied in early-stage cancer research as a possible drug target, but this has not led to guideline-based care.
Gene function
What if the gene works
Inside your cells, proteins need small adjustments to work at the right time and place. The PARP6 gene helps make those adjustments by adding a small chemical tag called ADP-ribose to selected proteins. Understanding PARP6 gene function helps explain how cells organize their internal framework and routine activity.
The PARP6 gene adds a small chemical tag called ADP-ribose to certain proteins inside the cell. This tag can change how a protein works, where it sits, or which partners it joins.
PARP6 activity helps control proteins linked to microtubules, the tiny tubes that support cell shape and internal transport. This helps cells keep their structure organized during everyday activity.
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, including differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not lead to any noticeable effect and are simply part of natural genetic variation. In some cases, though, a variant can more substantially change how a gene functions and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the PARP6 gene can make the protein unstable, cut it short, or alter key regions needed for its enzyme activity, which adds small chemical tags to other proteins. In practice, how PARP6 gene variants affect protein function often depends on how much activity remains. Some variants are milder and leave partial function, while more severe variants may lead to little or no working protein. Lower remaining activity has been linked to earlier and more marked neurodevelopmental symptoms.
How variants are linked to conditions
Variants in the PARP6 gene do not yet have a broadly confirmed link to a specific health condition, although conditions linked to PARP6 gene variants are still being studied and this picture may change. Anyone with a confirmed variant in the PARP6 gene should rely on guidance from their doctor or genetic counselor for interpretation that fits their own health and family history.
A variant is not necessarily a diagnosis
Genetic variants are a normal and common part of human biology across the general population. Most do not have a direct effect on health and simply reflect natural human diversity. For many genes, carrying a variant linked with a condition points to a possible association rather than a definite diagnosis, especially when more than one gene 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 PARP6 gene. If a change in PARP6 has been found in your family or on testing, a doctor or genetic counselor can help explain what it may mean for your personal risk.
Inheritance of PARP6 variants
PARP6-related conditions are currently understood to follow an autosomal dominant inheritance pattern, which means one altered copy of the PARP6 gene can be enough to cause the condition. If a parent carries a disease-causing variant, each child has a 50% chance of inheriting it. In many reported families, though, the change appears as a new (de novo) variant, meaning it was not inherited from either parent. This is the main pattern described for how PARP6 variants are inherited.
What does my PARP6 result mean for my family?
For PARP6, the best-known health link is a rare condition that appears to follow a recessive pattern, which means close relatives may be carriers even if they do not have symptoms. For family members, this mainly matters for brothers, sisters, and people planning children, because a shared family variant can sometimes be passed on silently across generations.
Genetic information
Genetic testing
How you find out about variants
PARP6 genetic testing looks for variants in the PARP6 gene using a blood sample, saliva sample, or sometimes cheek cells. Most labs read the gene's DNA sequence and compare it with the usual sequence to see whether a variant is present. Results may identify a pathogenic variant, a benign variant, or a variant of uncertain significance.
When should I consider getting a genetic test?
Testing for changes in the PARP6 gene may be considered when a child has unexplained developmental delay, low muscle tone, seizures, or movement problems, especially if brain development has also been affected. It can also be relevant when a family member is known to carry a PARP6 variant.
A genetic result is only one part of your health story
A genetic result can be informative, but what it tells you varies based on the condition and the kind of variant involved. Over time, factors such as age, lifestyle, environment, and medical history also influence how the body functions. In some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is most useful when viewed 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. Small differences in DNA can change how the body breaks down a drug, moves it through the body, or responds to it at its target. This is common and can help explain why the same treatment works well for one person, works less well for another, or causes more side effects in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can shape a person’s response to medications. It looks at connections between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes influence both how strongly a drug works and how the body handles it. This information can support treatment decisions that are more informed and more individualized. You can read more about this topic in the LearnHub.
Drugs influenced by the PARP6 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medicine choice or dose, so questions about side effects, new symptoms, or concerns about how your medicines may affect you are best discussed with your doctor.
History
PARP6 entered the scientific literature during the period when many human genes were being identified and grouped by shared features. It was named as part of the PARP family after researchers recognized similarities to other already known PARP genes. From these first observations, research expanded steadily. Over time, gene catalogs and sequencing studies helped refine how PARP6 was classified and where it is active in the body. Unlike a few better known PARP genes that became central to cancer drug research, PARP6 has had a quieter history, shaped mostly by gradual advances in genetics rather than by a single landmark public event.