The SDS gene gives your liver instructions to make an enzyme that breaks down the amino acid serine and helps support glucose production between meals. If this gene works less well, your body may handle serine less efficiently, which can affect normal liver metabolism. This gene plays an important role in keeping amino acid use and energy balance steady. It is mainly discussed in medical research rather than in popular culture.
What is a gene?
A gene is a piece of DNA that carries instructions your cells use to make molecules or guide activities in the body. Some genes provide the directions for producing proteins, which do much of the work inside cells. Others mainly regulate when certain processes happen, where they occur, and how active they are. Together, genes affect how the body develops and functions, 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
SDSGene function
What if the gene works
The SDS gene helps the liver break down the amino acid serine. This supports energy balance and helps your body manage nitrogen from protein metabolism.
Risk
What if the gene does not work
Variants in the SDS gene most often cause Shwachman-Diamond syndrome, which can affect blood cell production, digestion, growth, and bones. Effects range from milder to more severe, which can influence when problems begin and which features appear.
Treatment
What does that mean for your treatment
No SDS-specific treatment or drug selection approach is currently established in clinical guidelines for people with pathogenic variants in the SDS gene. The SDS gene is mainly being studied in basic research on serine metabolism and liver energy balance, rather than as a current treatment target.
Gene function
What if the gene works
In the liver, the SDS gene helps turn certain amino acids into forms your body can readily use. This supports steady energy handling, especially between meals. Understanding the SDS gene’s function helps you see how the body links protein use with everyday fuel needs.
The SDS gene gives liver cells instructions for an enzyme that breaks down serine, an amino acid. This produces pyruvate, a small molecule the body can use for energy and other basic cell tasks.
By making pyruvate, this gene supports the liver as it helps keep fuel available between meals. This is part of how the SDS gene helps the body use amino acids for energy.
Its enzyme can also work on threonine, another amino acid found in food proteins. This helps the liver process protein building blocks in a controlled, routine way.
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 the way the body responds to environmental influences. Many variants do not have any noticeable effect and simply reflect natural genetic variation. In some situations, though, a variant can change how a gene works more significantly and may contribute to, or cause, a genetic condition.
Genetic variants
What if the gene does not work
Variants in the SDS gene can change the shape, stability, or amount of the serine dehydratase enzyme, leading to reduced activity inside cells. Some are milder and leave partial enzyme function, while more disruptive variants may produce an unstable enzyme or little to no enzyme at all. This range is central to how SDS gene variants affect protein function and can influence how strongly cell metabolism is altered.
How variants are linked to conditions
At this time, the SDS gene does not yet have a broadly confirmed link to a specific health condition, although research on possible links between SDS gene variants and health conditions continues to develop. If you have a confirmed change in the SDS gene, your doctor or genetic counselor can explain what it may mean for you and your family.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of being human and are widely found in the general population. Most do not have a direct impact on health and simply represent natural variation among people. For many genes, carrying a variant associated with a condition suggests a possible link rather than a clear diagnosis, especially when more than one gene and environmental influences contribute. 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 SDS. Risk usually depends most on the specific genetic change present and family history. Anyone worried about personal risk can talk with a doctor or genetic counselor.
Inheritance of SDS variants
There is not yet a broadly confirmed disease inheritance pattern for the SDS gene, so SDS gene inheritance is not described in the same clear way as genes linked to a single well-defined inherited condition. Research may clarify this over time. The SDS gene is located on chromosome 12, which is an autosome, so you inherit one copy from your mother and one copy from your father.
What does my SDS result mean for my family?
There isn't yet a broadly confirmed inheritance pattern tied to a specific condition for SDS, though this understanding can change as research develops. If you have a specific SDS result and questions about what it could mean for your family, a doctor or genetic counselor can help explain it in the context of your personal and family history.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the SDS gene, doctors use genetic testing for SDS variants, usually on a blood sample or saliva sample. A lab reads the gene’s DNA code and checks for changes, which can help confirm whether a specific SDS variant is present.
When should I consider getting a genetic test?
There is not yet a broadly established, SDS-specific clinical reason for genetic testing in routine care. Testing decisions are usually based on your personal health history, family history, and guidance from a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic result can be useful, but what it can tell you varies with the condition and the specific type of variant. How the body functions over time is also shaped by many factors, including lifestyle, environment, age, and medical history. For some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is most helpful when viewed alongside other parts of care. In other situations, a genetic result can provide a clear answer. In areas like medication response, genetic results can also help put personal 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 bloodstream, or responds to it at its target. This helps explain why the same medication may work well for one person, do less for another, or cause more side effects in someone who is more sensitive to it.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can shape a person’s response to medications. It looks at gene-drug patterns to help explain why the same treatment can work differently from one person to another. For many medicines, genes affect how strongly a drug works or how the body processes it. This information can support more informed and more personalized treatment decisions. More information on this topic is available in the LearnHub.
Drugs influenced by the SDS gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication response, so questions about side effects, new symptoms, or changes to your medicines are best discussed with your doctor.