The SIRT5 gene helps your cells manage energy, especially inside mitochondria, the parts of cells that turn food into usable fuel. It also helps control how certain proteins work by removing small chemical tags, which supports normal metabolism and the handling of ammonia, a waste product. If the SIRT5 gene does not work well, cells may have more trouble keeping these processes balanced. Many variants in this gene have little effect, while a few may influence how efficiently these cell processes run.
What is a gene?
Genes are stretches of DNA that carry instructions your cells use to make molecules or regulate activities in the body. Some genes provide the directions for producing proteins, the parts of cells that do much of the work. Other genes mainly help control when certain processes happen, where they happen, and how strongly they operate. Taken together, genes influence how the body develops and works, and they can also affect how you respond to food, stress, or medicines. For a more detailed look at this topic, you can find more in the LearnHub.
Overview
SIRT5Gene function
What if the gene works
The SIRT5 gene helps mitochondria, your cells’ energy centers, keep energy production and waste handling balanced. Its protein fine tunes other proteins by removing small chemical tags, especially during fasting or other metabolic stress.
Risk
What if the gene does not work
Variants in the SIRT5 gene can reduce this mitochondrial enzyme's activity to different degrees, from mild to more severe. That can disrupt removal of certain chemical tags from proteins, which may alter energy use and ammonia handling inside cells.
Treatment
What does that mean for your treatment
No SIRT5-specific treatment or management approach is currently established for people with a pathogenic or loss-of-function variant in the SIRT5 gene. In research, the SIRT5 gene is being studied as a possible drug target and biomarker in some cancers and metabolic conditions, but this has not yet changed routine care.
Gene function
What if the gene works
Your cells use the SIRT5 gene to keep energy-making proteins working smoothly. Its protein is most active in mitochondria, the parts of cells that turn food into usable energy. Understanding what the SIRT5 gene does is easiest if you picture your cells adjusting many enzymes as energy needs shift through the day. SIRT5 mainly removes small chemical tags from proteins so they work at the right pace.
SIRT5 helps remove small chemical tags from proteins after they are made. These tags can change how a protein behaves. By clearing selected tags, SIRT5 keeps many cell proteins in a well-tuned working state.
Much of SIRT5 activity happens in mitochondria, where cells turn food into energy. It fine-tunes enzymes that handle fats, sugars, and amino acids. This supports steady day-to-day energy production.
SIRT5 helps control enzymes involved in handling nitrogen waste from protein breakdown. That work supports the urea cycle, the pathway that helps your body turn ammonia into waste you can clear.
SIRT5 also adjusts proteins that help cells manage normal oxidative stress, the low-level chemical strain created during energy use. This helps cells stay balanced during routine metabolism.
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 between people, including appearance, metabolism, and the way the body responds to environmental influences. Many variants do not have any noticeable effect and are simply part of natural genetic variation. In some situations, though, a variant changes how a gene works more substantially and can contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the SIRT5 gene can change the protein’s shape, stability, or delivery into mitochondria, which helps explain how SIRT5 gene variants affect protein function. Some variants may only partly reduce enzyme activity, while more severe variants can leave the protein unstable or with little to no activity. Variants near key working sites may also weaken how the protein binds its targets, leading to a stronger cellular effect.
How variants are linked to conditions
Right now, the SIRT5 gene does not yet have a broadly confirmed link to a specific health condition, so information on SIRT5 gene variants linked to disease is still developing. If you have a reported variant in the SIRT5 gene or a confirmed SIRT5-related diagnosis, your doctor or genetic counselor can explain what that result may mean for you and your family.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are widespread in the general population. Most do not directly affect health and instead 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 are involved. In some situations, though, a single well-characterized variant in a specific 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 directly related to the SIRT5 gene. Many health outcomes linked to this gene in research are also shaped by age, other genes, and everyday factors such as diet, exercise, and smoking.
Inheritance of SIRT5 variants
There is not yet a broadly confirmed inheritance pattern tied to a specific human condition for the SIRT5 gene, so there is no established single answer to how variants of the SIRT5 gene are inherited in a disease setting. The SIRT5 gene is located on chromosome 6, which is an autosome. That means each person inherits one copy from each parent, and any SIRT5 variant would generally be passed through families in the usual way for genes on non sex chromosomes.
What does my SIRT5 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific health condition for the SIRT5 gene, though this can change as research grows. If you have a specific SIRT5 result and want to understand what it could mean for your relatives, a doctor or genetic counselor can help explain it in the context of your family history and health.
Genetic information
Genetic testing
How you find out about variants
SIRT5 genetic testing looks for changes in the SIRT5 gene using a blood sample, saliva sample, or cheek swab. A lab reads the gene’s DNA code and reports whether a variant was found, and whether it is considered benign, uncertain, or linked to health effects.
When should I consider getting a genetic test?
There is not yet a widely accepted medical reason to test the SIRT5 gene on its own. Decisions about genetic testing are usually based on your personal health and family history, and are best discussed with a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic result can provide useful insight, but how much it reveals depends on the condition and on the type of variant involved. Over time, many factors, including lifestyle, environment, age, and medical history, influence how the body works. For some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is best considered alongside 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 personal experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. This happens because your body may absorb, break down, transport, or respond to a drug a little differently from someone else’s body. These differences are common and can influence how well a treatment works or how sensitive a person is to side effects.
What is Pharmacogenetics?
Pharmacogenetics is the area of study focused on how differences in genes affect responses to medications. It examines links between genes and drugs to help explain why the same treatment may work differently from one person to another. With many medicines, genes can influence how strongly a drug works or how the body handles it. This information can help guide treatment decisions that are more informed and more individualized. To learn more about this topic, visit the LearnHub.
Drugs influenced by the SIRT5 gene
When should I seek medical advice?
There isn’t yet a broadly confirmed role for this gene in guiding how medicines are chosen or adjusted, so questions about treatment response, side effects, or supplements are best discussed with your doctor.
History
Research on the SIRT5 gene grew out of wider interest in the sirtuin family after scientists linked the yeast Sir2 gene to aging and cell survival in the 1990s. In the early 2000s, researchers identified the SIRT5 gene as one of the seven human sirtuin genes. Building on this early work, scientists mapped where SIRT5 is active in cells and began clarifying how it differs from related genes in the same family. Its history is mainly tied to steady laboratory research rather than a single high profile discovery. Over time, descriptions became more precise as studies connected the SIRT5 gene to energy use and other basic cell processes.