The EFL1 gene helps cells assemble ribosomes, the tiny structures that make proteins your body needs to grow and repair itself. If this gene does not work properly, cells may struggle to make proteins efficiently, which can lead to poor growth, low blood counts, frequent infections, and problems affecting the pancreas or bones. This gene plays an important role in tissues that renew themselves often, such as the bone marrow. Pathogenic variants in the EFL1 gene are linked to rare inherited conditions that can resemble Shwachman-Diamond syndrome.
What is a gene?
A gene is a stretch of DNA that holds instructions your cells can use to make molecules or regulate processes in the body. Some genes provide the information needed to make proteins, the working parts of cells. Others mainly help decide when certain processes take place, where they take place, and how strongly they operate. Together, genes affect how the body develops and functions, and they can also shape how you respond to food, stress, or medications. To explore this topic in more detail, you can learn more in the LearnHub.
Overview
EFL1Gene function
What if the gene works
The EFL1 gene helps cells build working ribosomes, the structures that make proteins. Its protein works with SBDS to prepare the large ribosome unit for joining the small unit, supporting normal growth and blood cell production.
Risk
What if the gene does not work
Variants in the EFL1 gene can cause a condition with low blood counts, poor growth, and sometimes pancreas or bone problems. Milder to more severe variants may change when features appear and how strongly they affect daily life.
Treatment
What does that mean for your treatment
For people with a pathogenic variant in the EFL1 gene, no EFL1-specific treatment or drug choice is currently established. Care is guided by the person’s symptoms and may include supportive treatment for blood, growth, or digestive problems. The EFL1 gene is being studied as part of ribosome biology, but this has not yet led to a targeted therapy.
Conditions associated with EFL1
Gene function
What if the gene works
Your cells need the EFL1 gene to help prepare ribosomes, the tiny structures that build proteins. It works during the final setup steps for the large ribosome half, making sure it is ready for daily cell activity. This is a key part of how the EFL1 gene helps protein production in the body.
The EFL1 gene helps finish building the large half of the ribosome, the cell structure that makes proteins. It acts near the end of assembly so this ribosome part is ready for normal use.
Working with the SBDS protein, the EFL1 gene helps remove eIF6, a temporary safety factor that keeps ribosome parts apart until they are ready. This allows the large and small ribosome halves to join and begin making proteins.
This release step also works like a final quality check before a ribosome starts regular protein production. It helps your cells use ribosomes that are fully prepared for steady day to day work.
What is a variant?
A genetic variant is a minor change in the DNA sequence of a gene. These changes are common and are part of 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 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 EFL1 gene can change the shape or stability of the EFL1 protein, so it cannot work properly with SBDS to finish building ribosomes, the cell’s protein making machinery. This is how EFL1 gene variants affect protein function at the cellular level. Some variants only partly reduce this step, while more severe variants can block it much more. Cells then make proteins less efficiently, and stronger loss of function is often linked to earlier or more noticeable Shwachman-Diamond syndrome-like features.
How variants are linked to conditions
Pathogenic variants in the EFL1 gene cause a rare inherited condition called Shwachman-Diamond syndrome 2. In reports on EFL1 gene variants and Shwachman-Diamond syndrome 2, common features include low blood cell counts, poor growth, pancreas problems that affect digestion, and changes in bone development. Some people also have a higher chance of infections because their white blood cell counts can be low.
A variant is not necessarily a diagnosis
Genetic variants are a common and normal part of human biology. Most do not directly affect health and simply reflect natural variation among people. For many genes, having a variant associated with a condition points to a possible link rather than a certain diagnosis, particularly when several genes and environmental influences also play a role. In some situations, though, one well-characterized variant in a particular gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For EFL1, risk is mainly shaped by genetics rather than lifestyle. Health problems linked to this gene usually happen when both copies carry disease-causing changes, often inherited from carrier parents, and there is not broadly confirmed evidence that diet, exercise, or other everyday factors meaningfully change that risk.
Inheritance of EFL1 variants
For families asking how EFL1 gene variants are inherited, the well-established pattern is autosomal recessive. This means a child usually needs to inherit two disease-causing variants in the EFL1 gene, one from each parent, to be affected. Parents who each carry one variant are often unaffected themselves. With each pregnancy, two carrier parents have a 25% chance of having an affected child, a 50% chance of having a child who is a carrier, and a 25% chance of having a child with neither familial variant.
What does my EFL1 result mean for my family?
For EFL1, the family impact is usually recessive, which means parents are often healthy carriers and brothers or sisters may also have the condition or be carriers. Close relatives may also carry the same gene change without knowing it. This can matter for family planning, because two carriers can have a child with the condition.
Genetic information
Genetic testing
How you find out about variants
Testing for changes in the EFL1 gene usually uses a blood or saliva sample. In genetic testing for EFL1 variants, a lab reads your DNA, often through a multigene panel or broader DNA sequencing, to look for changes linked with an inherited condition. Results may show a relevant variant, a benign finding, or an uncertain result.
When should I consider getting a genetic test?
Consider genetic testing for the EFL1 gene when a child has ongoing low blood counts, repeated infections, poor growth, feeding trouble, or pancreatic problems, especially if similar issues run in the family. Testing can help show whether these symptoms are part of an inherited condition linked to EFL1.
A genetic result is only one part of your health story
A genetic result can be informative, but what it can tell you varies with the condition and the type of variant involved. Over time, many factors, including lifestyle, environment, age, and medical history, also shape how the body works. For some conditions, especially those affected by many genes, genetic information provides context rather than certainty and is most useful when viewed alongside other parts of care. In other situations, a genetic result may offer a clear answer. In areas like medication response, genetic results can also help make sense of individual experiences.
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 absorbs, breaks down, or moves a drug, so the same treatment may work better for one person and less well for another. These differences are common and can also influence how sensitive someone is to side effects.
What is Pharmacogenetics?
Pharmacogenetics looks at how genetic differences can shape a person’s response to medications. It examines relationships between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes affect either how strongly a drug works or how the body handles it. This information can support treatment decisions that are both better informed and more individualized. You can read more about this topic in the LearnHub.
Drugs influenced by the EFL1 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding how medicines are chosen or used, so general questions about symptoms, treatments, or side effects are best discussed with your doctor or pharmacist.