The MRPL23 gene helps mitochondria, the parts of cells that make energy, build the proteins they need to work well. If this gene does not work properly, cells may struggle to make enough energy, especially in the brain, muscles, and heart. The protein made by this gene helps your cells keep energy production steady, so more disruptive variants can contribute to features of mitochondrial disease such as developmental delays, weakness, or poor growth.
What is a gene?
Within DNA, a gene is a section that holds information your cells use to make molecules or manage processes in the body. Some genes carry the instructions for making proteins, the parts of cells that do the work. Others mainly direct when specific processes take place, where they occur, and how strongly they run. Together, genes affect how the body develops and works, and they can influence how you respond to food, stress, or medications. To explore this topic in more detail, you can read more in the LearnHub.
Overview
MRPL23Gene function
What if the gene works
The MRPL23 gene helps mitochondria, the cell's energy makers, build proteins needed to produce energy. This supports normal energy supply in tissues throughout the body.
Risk
What if the gene does not work
Variants in the MRPL23 gene can range from milder to more severe and may reduce how well mitochondria make proteins. This can disrupt the protein-making machinery inside mitochondria and lower the cell’s energy production.
Treatment
What does that mean for your treatment
No MRPL23-specific treatment or management approach is currently established for people with a pathogenic variant in the MRPL23 gene. MRPL23 is being studied in cancer research as a possible biomarker and treatment target, but this has not led to guideline-based drug choices in routine care.
Gene function
What if the gene works
Mitochondria need the MRPL23 gene to keep their internal protein-making system running. This helps cells make a small but essential set of proteins used for everyday energy production. In plain terms, this is how the MRPL23 gene supports energy production in cells. When it is working properly, mitochondrial protein building stays organized and steady.
The MRPL23 gene helps mitochondria read their own genetic instructions and turn them into proteins. These proteins are made inside mitochondria, the parts of cells that help supply usable energy.
Its protein becomes part of the large protein-making machine inside mitochondria. This helps that machine hold the right shape so mitochondrial proteins can be assembled in a controlled way.
By helping mitochondria make key proteins, the MRPL23 gene supports normal cellular energy production. This steady process is important across the body, especially in cells that use a lot of energy.
What is a variant?
A genetic variant is a minor difference in the DNA sequence within a gene. These differences are common and help shape normal human diversity, including variation in appearance, metabolism, and the way the body responds to environmental influences. Many do not cause any noticeable effect and are simply part of natural genetic variation. Sometimes, 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
MRPL23 gene variants can change how much MRPL23 protein is made or alter its shape, which may stop it from fitting into the mitochondrial ribosome correctly. This is how MRPL23 gene variants affect mitochondrial protein synthesis, often reducing the cell’s ability to build key parts of its energy system. Some variants have a milder effect, while more disruptive changes, including splice or truncating variants, can cause a larger loss of function.
How variants are linked to conditions
Variants in the MRPL23 gene do not yet have a broadly confirmed link to a specific health condition, although research on how MRPL23 gene variants are linked to disease is still developing. Anyone with a confirmed MRPL23-related diagnosis should rely on guidance from their doctor or genetic counselor rather than general information.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are widespread in the general 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 confirmed diagnosis, especially when several genes and environmental factors also contribute. In some situations, though, a single well-characterized variant in a specific 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 factors that increase or reduce health risk related to the MRPL23 gene. If a change in MRPL23 is found on testing, a doctor or genetic counselor can help explain what it may mean for you or your family.
Inheritance of MRPL23 variants
There is not yet a broadly confirmed, disease-specific Mendelian MRPL23 gene inheritance pattern that clinicians use in routine care, and this picture may become clearer as research develops. In practice, discussions of the MRPL23 gene inheritance pattern are therefore usually cautious rather than definitive. The MRPL23 gene is located on chromosome 11, which is an autosome, so you inherit one copy from your mother and one copy from your father. That means any inherited change in this gene could be passed through either side of the family.
What does my MRPL23 result mean for my family?
There is not yet a broadly confirmed inheritance pattern tied to a specific condition for MRPL23, though this understanding can change as research develops. If you have a specific MRPL23 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
MRPL23 genetic testing looks for DNA variants in the MRPL23 gene using a blood sample, saliva, or a cheek swab. A lab reads the gene, often as part of a multigene panel or exome test, and reports whether a variant was found and how it is classified.
When should I consider getting a genetic test?
There is not yet a broadly established reason for most people to get testing focused specifically on the MRPL23 gene. Testing decisions are best made with a doctor or genetic counselor, based on your symptoms, family history, and the reason testing is being considered.
A genetic result is only one part of your health story
Genetic results can provide useful insight, but how much they reveal depends on the condition and the type of variant involved. Over time, how the body works 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 best interpreted alongside other parts of care. In other situations, a genetic result can give a clear answer. In areas such as 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. A treatment that works well for one person may work less well for another, or may cause more side effects, because the body can absorb, break down, transport, or respond to the drug differently. These differences are common and are one reason medication response is not always the same from person to person.
What is Pharmacogenetics?
Pharmacogenetics focuses on how genetic differences shape responses to medications. By looking at links between genes and drugs, it helps explain why the same treatment can affect people in different ways. For many medicines, genes influence how the body processes a drug and how strong its effects may be. This information can support more informed, individualized treatment decisions. To explore this topic further, you can learn more in the LearnHub.
Drugs influenced by the MRPL23 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how medicines work, so general medication questions, side effects, or concerns about treatment are best discussed with your doctor or pharmacist.