The SBDS gene helps cells build ribosomes, the tiny structures that make proteins needed for growth and repair. Every cell in your body uses this gene to keep fast-growing tissues working well, especially in the bone marrow and pancreas. Certain variants in the SBDS gene can lead to Shwachman-Diamond syndrome, which may cause low blood counts, frequent infections, trouble absorbing nutrients, short stature, and changes in the bones.
What is a gene?
Genes are stretches of DNA that hold instructions your cells use to make molecules or direct processes in the body. Some genes carry the information needed to produce proteins, which are the working parts of cells. Others mainly help regulate when certain processes happen, where they happen, and how active they are. Together, genes affect how the body develops and works, and they can influence how you respond to food, stress, or medications. For a closer look at this topic, you can find more in the LearnHub.
Overview
SBDSGene function
What if the gene works
The SBDS gene helps cells build ribosomes, the structures that make proteins. This supports normal cell growth and division, especially in tissues that renew themselves often, such as bone marrow.
Risk
What if the gene does not work
When the SBDS gene does not work properly, Shwachman-Diamond syndrome can affect the bone marrow, pancreas, growth, and bones. Milder and more severe variants may influence which features appear, when they start, and how marked they are.
Treatment
What does that mean for your treatment
No drug directly targets the SBDS gene. Care is guided by the complications it causes and can include pancreatic enzyme replacement, antibiotics or G-CSF for low white blood cells, and blood product support. Hematopoietic stem cell transplant may be used for severe bone marrow failure or leukemia.
Conditions associated with SBDS
Gene function
What if the gene works
Every day, your cells need to build proteins to grow, renew, and carry out routine work. The SBDS gene supports this by helping ribosomes, the cell’s protein-making machines, become fully ready for use. Understanding how the SBDS gene helps ribosomes make proteins shows why it matters for steady cell function.
The SBDS gene helps the large part of the ribosome finish maturing and join the small part. This gives cells working ribosomes that are ready to begin making proteins.
Once ribosomes are ready, cells can read genetic instructions and turn them into proteins in a steady way. This supports everyday needs such as growth, tissue renewal, and normal cell activity.
What is a variant?
A genetic variant is a minor change in a gene’s DNA sequence. These changes are common and help shape normal human diversity, such as differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not cause any noticeable effects and are simply part of natural genetic variation. In some situations, though, a variant can change how a gene functions more significantly and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the SBDS gene often lower the amount of SBDS protein or make it unstable, so cells cannot complete ribosome assembly, the step that prepares the machinery cells use to make proteins. This helps explain how SBDS gene variants affect ribosome assembly in Shwachman-Diamond syndrome. Some variants leave partial function, while more disruptive variants can remove most or all activity and are often linked with earlier or more marked features.
How variants are linked to conditions
Pathogenic variants in the SBDS gene cause Shwachman-Diamond syndrome, a rare inherited condition linked to low blood counts, pancreatic problems that affect digestion and growth, and changes in bone development. People with this SBDS gene condition also have a higher chance of bone marrow failure and blood cancers such as myelodysplastic syndrome and acute myeloid leukemia. A confirmed diagnosis usually reflects pathogenic variants in both copies of the gene.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are common throughout the general population. Most do not have a direct effect on health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when several genes and environmental factors also play a part. In some situations, though, a single well-characterized variant in a particular 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 outside factors that increase or reduce risk related to the SBDS gene. For SBDS-related conditions, risk is mainly shaped by the gene changes a person is born with, and there is not enough evidence to say that lifestyle changes lower that risk.
Inheritance of SBDS variants
SBDS-related conditions are inherited in an autosomal recessive pattern. In practical terms, how SBDS gene variants are inherited usually means a child needs to receive one altered copy of the SBDS gene from each parent to have the condition. When both parents carry one SBDS variant, each pregnancy has a 25% chance of an affected child, a 50% chance of a child who is a carrier, and a 25% chance of a child who inherits neither altered copy. Parents who are carriers typically do not have the condition themselves.
What does my SBDS result mean for my family?
For SBDS, family members can sometimes carry the same gene change even if they feel well. Parents of a child with an SBDS-related condition are usually healthy carriers, and brothers or sisters may also be affected or be carriers. Other close relatives, such as aunts, uncles, and cousins, may also carry the change, so the result can matter beyond one person.
Genetic information
Genetic testing
How you find out about variants
SBDS genetic testing checks your DNA, usually from a blood or saliva sample, for variants in the SBDS gene. It can confirm whether a person has two harmful variants linked to Shwachman-Diamond syndrome or is a carrier. Results are read in a lab by comparing the gene sequence with the usual version.
When should I consider getting a genetic test?
Consider SBDS testing if a child or adult has signs of Shwachman-Diamond syndrome, such as ongoing low blood counts, repeated infections, poor growth, chronic diarrhea or greasy stools, or pancreas problems. Testing can also help when this condition runs in the family or when a close relative has a known SBDS variant.
A genetic result is only one part of your health story
A genetic result can provide valuable insight, but how much clarity it gives depends on the condition and the type of variant involved. Many factors, including age, lifestyle, environment, and medical history, influence how the body works over time. In some conditions, especially those shaped by many genes, genetic information provides context rather than certainty and is most useful when considered alongside other parts of care. In other situations, a genetic result can offer 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. This helps explain why the same treatment works well for one person, seems weaker for another, or causes more side effects in someone else. Small differences in how the body absorbs, breaks down, moves, or responds to a drug are common, and they can influence both benefit and sensitivity.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can shape the way people respond to medicines. It studies the links between genes and drugs to clarify why the same treatment may work differently from one person to another. For many medications, genes influence both how strongly a drug works and how the body handles it. This information can support more informed, more personalized treatment decisions. To explore this subject in greater detail, you can learn more in the LearnHub.
Drugs influenced by the SBDS 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 any concerns about your health, treatment plan, or medication side effects are best discussed with your doctor.
History
Shwachman-Diamond syndrome was recognized clinically decades before the SBDS gene was identified, as doctors noticed a recurring pattern of poor growth, digestive problems, and low blood counts in some children. In 2003, researchers linked this condition to variants in the SBDS gene, giving families and clinicians a clearer genetic explanation. From these first observations, research expanded steadily. That discovery improved diagnosis, especially for people whose symptoms overlapped with other childhood bone marrow conditions. It also helped confirm that Shwachman-Diamond syndrome is an inherited condition that can run in families. Since then, the SBDS gene has remained an important part of rare disease genetics and bone marrow research.