The LYRM4 gene helps cells make iron sulfur clusters, small helper parts that many enzymes need to produce energy. This gene helps your body keep its energy systems running, especially in mitochondria, the parts of cells that act like power plants. If the LYRM4 gene does not work properly, cells may struggle to make enough energy. This can cause lactic acidosis, low muscle tone, feeding or breathing problems, liver illness, and developmental delay, often starting in infancy.
What is a gene?
Genes are stretches of DNA that hold instructions your cells use to make molecules or regulate processes in the body. Some genes provide the directions for building proteins, which are the functional parts of cells. Others mainly guide when certain processes 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 react to food, stress, or medicines. For a closer look at this subject, you can find more in the LearnHub.
Overview
LYRM4Gene function
What if the gene works
The LYRM4 gene helps mitochondria, your cells’ energy centers, make iron-sulfur clusters. These small parts support energy production and many routine cell tasks.
Risk
What if the gene does not work
More disruptive variants in the LYRM4 gene can impair iron sulfur cluster assembly and lower cellular energy production. In the best known cases, this is linked to early onset lactic acidosis, breathing problems, and developmental delay, with severity varying widely.
Treatment
What does that mean for your treatment
At present, no LYRM4-specific treatment or management approach is established for pathogenic variants in the LYRM4 gene. Drug choices are not currently guided by the LYRM4 gene itself, and care is based on the person’s symptoms and overall clinical picture.
Conditions associated with LYRM4
Gene function
What if the gene works
Inside mitochondria, the LYRM4 gene helps your cells assemble tiny iron-sulfur clusters, small parts that many proteins need to work. It does this by helping a sulfur-handling protein team stay active and organized. This helps explain how the LYRM4 gene supports mitochondrial energy production and other routine cell tasks.
The LYRM4 gene helps build iron-sulfur clusters, small iron and sulfur parts used by many proteins. These clusters are made mainly inside mitochondria, the parts of cells that help produce energy.
Its protein works beside NFS1, a partner protein that removes sulfur from the amino acid cysteine. This step provides one of the key ingredients needed to assemble iron-sulfur clusters.
LYRM4 also helps keep the cluster-making protein team stable and working in step. That steady teamwork supports normal activity in proteins involved in energy release and other basic cell jobs.
What is a variant?
A genetic variant is a small difference in the DNA sequence of a gene. These changes are common and help make up 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. Sometimes, however, 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 LYRM4 gene can weaken or destabilize the protein, so cells build fewer iron sulfur clusters, small parts needed by many energy enzymes. In how LYRM4 gene variants affect protein function, some changes leave partial activity, while more severe variants can greatly reduce or nearly stop this process. That difference in function can influence how early related symptoms appear and how strongly they affect the body.
How variants are linked to conditions
Among LYRM4 gene variants linked to conditions, the clearest established association is combined oxidative phosphorylation deficiency 19, a very rare inherited mitochondrial condition. Affected infants or children may have feeding problems, developmental delay, muscle weakness, high lactic acid levels, and sometimes liver or breathing problems. When disease-causing variants are found in both copies of the LYRM4 gene, this can confirm the diagnosis.
A variant is not necessarily a diagnosis
Variants in genes are a routine feature of human biology and are widespread across the population. Most do not directly affect health and instead reflect normal human diversity. For many genes, having a variant associated with a condition suggests a possible link rather than a certain diagnosis, particularly when several genes and environmental influences also play a part. In other 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?
There isn't yet broadly confirmed evidence on specific factors that increase or reduce risk related to the LYRM4 gene. For families with a LYRM4-related condition, risk is mainly shaped by the inherited gene change rather than day-to-day habits, so a doctor or genetic counselor can help explain personal and family risk.
Inheritance of LYRM4 variants
LYRM4-related conditions are inherited in an autosomal recessive pattern. In practical terms, LYRM4 gene inheritance usually means a child needs to receive one disease-causing variant from each parent to be affected. Parents who each carry one variant are typically unaffected carriers, and with each pregnancy there is a 25% chance the child will inherit both variants, a 50% chance the child will be a carrier, and a 25% chance the child will inherit neither variant. This pattern applies equally to boys and girls.
What does my LYRM4 result mean for my family?
For LYRM4, the well-known inherited condition linked to this gene follows a recessive pattern, which means close relatives may carry the same gene change without knowing it. Brothers and sisters may have the same condition or be carriers, and parents are often carriers. This can also matter for future children and for other blood relatives on both sides of the family.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a change in the LYRM4 gene, a lab can do genetic testing for LYRM4 variants using a blood sample, saliva, or cheek swab. The test reads the gene’s DNA code and looks for variants, then a report explains whether any finding is linked to a known health condition or is still uncertain.
When should I consider getting a genetic test?
Consider LYRM4 testing if a baby or child has signs of a rare inherited energy-production condition, such as severe low blood sugar, high lactic acid, muscle weakness, breathing problems, or liver problems, especially with a family history. It can also clarify whether both parents carry a LYRM4 change after an affected pregnancy or child.
A genetic result is only one part of your health story
A genetic finding can provide useful insight, yet how much it reveals depends on the condition and on the type of variant involved. Many factors, including lifestyle, environment, age, and medical history, influence how the body works over time. For some conditions, especially those shaped by many genes, genetic information provides context rather than certainty and is best understood along with other parts of care. In other situations, a genetic result may offer a clear answer. In areas like medication response, genetic results can help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body responds to medicines. Some people break down a drug more slowly or more quickly than others, so the same dose can lead to different benefits or side effects. This kind of difference is common and can help explain why a treatment works well for one person, seems weaker for another, or causes more sensitivity in someone else.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in a person’s genes affect their response to medications. It looks at links between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes can influence both how strongly a drug works and how the body processes it. This information can support treatment decisions that are more informed and more individualized. To explore this subject in greater detail, you can learn more in the LearnHub.
Drugs influenced by the LYRM4 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 questions about side effects, new symptoms, or treatment changes are best discussed with your doctor.
History
In the early 2000s, researchers identified the LYRM4 gene while studying how mitochondria, the cell’s energy producing parts, support essential chemical processes. The gene was first widely described under the name ISD11, and later work helped place it within the larger LYR motif family of genes. From these first observations, research expanded steadily, linking LYRM4 to a broader network of genes needed for normal cell function. As genetic studies became more precise, LYRM4 moved from being a little known laboratory finding to a recognized part of rare inherited mitochondrial conditions. Its history is mainly a scientific one, shaped by advances in molecular genetics rather than by public attention.