The NUP155 gene helps build the tiny gateways that move important molecules in and out of a cell’s nucleus, which is the control center for genetic instructions. If this gene does not work properly, that traffic can be disrupted and cells may not function as they should, especially heart cells. Certain rare variants in the NUP155 gene are linked to abnormal heart rhythm, including atrial fibrillation, and some more disruptive inherited variants can affect babies very early in life.
What is a gene?
Genes are stretches of DNA that hold instructions cells use to make molecules or regulate activities in the body. Some carry the code for proteins, which do much of the cell’s day to day work. Others mainly guide when certain activities 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, and medicines. More detail is available in the LearnHub.
Overview
NUP155Gene function
What if the gene works
The NUP155 gene helps build nuclear pores, the channels that move molecules in and out of a cell’s nucleus. It also supports the stability of the nucleus and normal cell signaling.
Risk
What if the gene does not work
Pathogenic variants in the NUP155 gene are best known for causing heart rhythm problems, especially atrial fibrillation, sometimes with early sudden cardiac death. Milder and more severe variants can affect how early problems appear and how strongly the heart is affected.
Treatment
What does that mean for your treatment
No NUP155-specific treatment or management approach is currently established. The NUP155 gene is being studied in early research on inherited heart rhythm conditions, but this has not yet changed medication choices or created a targeted therapy.
Conditions associated with NUP155
Gene function
What if the gene works
Your cells constantly move instructions and supplies in and out of the nucleus, the compartment that holds DNA. The NUP155 gene helps build the gateways that manage this traffic and keep that boundary stable. Understanding what the NUP155 gene does in the body helps explain how cells stay organized during everyday activity.
The NUP155 gene helps build the pores that span the membrane around the nucleus. Its protein forms part of a sturdy framework that helps each gateway keep its shape.
NUP155 supports the controlled movement of proteins and RNA between the nucleus and the rest of the cell. This exchange helps cells read DNA instructions and carry out routine tasks in an orderly way.
By helping organize the membrane around the nucleus, the NUP155 gene supports a stable space for your DNA. That steady setup helps many cell types keep normal cell activity well coordinated.
What is a variant?
A genetic variant is a minor change in a gene’s DNA sequence. These changes are common and help explain normal differences among people, such as appearance, metabolism, or the way the body responds to environmental influences. Many do not have any noticeable effect and are simply part of natural genetic variation. Sometimes, 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
Variants in the NUP155 gene can change the protein’s shape, make it less stable, disrupt its placement in the nuclear pore, or weaken its binding to partner proteins, showing how NUP155 gene variants affect nuclear pore function. Milder variants may leave some activity in place, while more severe variants can cause a larger loss of function. In families with NUP155-related atrial fibrillation, greater functional disruption may be linked to earlier onset and more pronounced effects.
How variants are linked to conditions
Pathogenic variants in the NUP155 gene are most clearly linked to a rare inherited form of atrial fibrillation, so the NUP155 gene and atrial fibrillation are the main established association. In affected families, this can show up as an irregular heartbeat at a younger age than usual. Some reported families have also had related heart rhythm problems and, in a few cases, sudden cardiac death.
A variant is not necessarily a diagnosis
Genetic variants are common across the general population and are a normal feature of human biology. Most do not directly affect health and instead reflect natural variation between people. For many genes, having a variant associated with a condition points to a possible link, not a certain diagnosis, particularly when several genes and environmental influences also play a role. In other situations, though, one well-understood variant in a particular gene is enough to establish the 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 NUP155 gene. Because changes in this gene have mainly been linked to rare heart rhythm problems in some families, personal risk can vary, and concerns are best discussed with a doctor or genetic counselor.
Inheritance of NUP155 variants
The inheritance of NUP155 gene variants is not yet defined by one broadly confirmed pattern for a specific NUP155 related condition. Research has linked some changes in the NUP155 gene to heart rhythm conditions in families, but the exact inheritance pattern can vary across reports and is still being clarified. The NUP155 gene is located on chromosome 5, which is an autosome, so you inherit one copy from your mother and one copy from your father.
What does my NUP155 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific condition for NUP155. A NUP155 result may still have implications for relatives, but what it means for family members depends a lot on the exact change found and the health condition being considered. A doctor or genetic counselor can explain whether testing might be relevant for close relatives in your family.
Genetic information
Genetic testing
How you find out about variants
To look for changes in the NUP155 gene, a lab can use genetic testing for NUP155 variants on a blood, saliva, or cheek swab sample. The test reads the DNA code in this gene and checks for variants that may help explain a suspected inherited condition or show whether a variant runs in a family.
When should I consider getting a genetic test?
There is not yet a broadly established NUP155-specific reason for genetic testing in most people. Testing decisions are usually based on a personal or family history of heart rhythm problems or other inherited conditions and are best made with a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic finding can provide meaningful insight, but how much it reveals depends on the condition and the type of variant involved. Over time, many factors, including lifestyle, environment, age, and medical history, shape how the body functions. For some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is best understood together with other aspects 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 perspective.
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 helps explain why the same medication may work well for one person, work less well for another, or cause more side effects in someone who is more sensitive to it.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in genes affect the way people respond to medicines. It studies gene-drug patterns to help explain why the same treatment can work differently in different people. For many drugs, genes influence both how strongly the medicine works and how the body handles it. This information can support more informed, personalized treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the NUP155 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting how medicines will work, so any concerns about side effects, treatment changes, or new health symptoms are best discussed with your doctor.