The MRPL35 gene gives your cells instructions for a protein inside mitochondria, the parts of cells that make energy. The protein made by this gene helps your cells build key mitochondrial proteins, so if MRPL35 is not working properly, energy production can drop. Rare inherited variants in the MRPL35 gene are linked to mitochondrial disease and may affect growth, development, movement, or other body systems that need a steady energy supply.
What is a gene?
Genes are stretches of DNA that give your cells instructions for making molecules or managing processes in the body. Some genes carry the directions for producing proteins, which are the parts of cells that do much of the work. Others mainly regulate when certain processes happen, where they happen, and how active they are. Together, genes affect how the body grows and works, and they can also influence how you respond to food, stress, or medications. For a deeper look at this topic, you can learn more in the LearnHub.
Overview
MRPL35Gene function
What if the gene works
The MRPL35 gene helps mitochondria, the parts of cells that make energy, build proteins. This supports normal energy production and everyday cell function.
Risk
What if the gene does not work
More disruptive variants in the MRPL35 gene can cause a mitochondrial condition with developmental delay, low muscle tone, and brain changes. Milder and more severe variants may change when features appear and how strongly learning and movement are affected.
Treatment
What does that mean for your treatment
No treatment or drug choice is currently guided specifically by pathogenic or loss-of-function variants in the MRPL35 gene. Care is based on the person’s symptoms and supportive management, and MRPL35 is mainly being studied to better understand mitochondrial disease rather than as a routine drug target.
Gene function
What if the gene works
Your cells need steady energy to keep muscles moving, nerves signaling, and organs working. The MRPL35 gene helps mitochondria, the parts of cells that make energy, build a small set of proteins they need for daily work. Understanding how the MRPL35 gene supports mitochondrial energy production helps show why it matters in routine cell function.
Inside mitochondria, MRPL35 forms part of the protein-making machinery. It helps read instructions from mitochondrial DNA and link amino acids into proteins.
The proteins made with help from MRPL35 are used in oxidative phosphorylation (the process cells use to make most of their usable energy). This supports steady energy supply across the body.
MRPL35 helps keep the mitochondrial protein-making machine assembled and working in an orderly way. This supports steady production of the small set of proteins made inside mitochondria.
What is a variant?
A genetic variant is a small alteration in the DNA sequence within a gene. These changes are common and are part of normal human diversity, including differences in appearance, metabolism, and how the body responds to environmental influences. Many have no noticeable effect and simply represent natural genetic variation. In some situations, 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 MRPL35 gene can change the protein’s shape, stability, or ability to join the mitochondrial ribosome, so the cell makes fewer proteins needed for energy production in mitochondria. Milder variants may leave partial activity, while more severe variants, including changes that cut the protein short or alter its RNA message, can cause a drop in mitochondrial protein synthesis. This range helps explain why MRPL35 gene variant effects on mitochondrial protein synthesis can differ from person to person.
How variants are linked to conditions
Research on how variants in the MRPL35 gene are linked to conditions is still developing, and the MRPL35 gene does not yet have a broadly confirmed link to one specific health condition. If you have a confirmed variant in the MRPL35 gene and a related diagnosis, your doctor or genetic counselor can explain what that result means for you and your family.
A variant is not necessarily a diagnosis
Variants are a normal feature of human biology and are common in the general population. Most have no direct effect on health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition indicates a possible link rather than a definite diagnosis, especially when multiple genes and environmental factors are involved. In some situations, however, 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 MRPL35 gene. In families with a disease-causing MRPL35 change, risk is mainly shaped by the inherited gene change itself rather than lifestyle or environmental factors.
Inheritance of MRPL35 variants
MRPL35-related conditions are inherited in an autosomal recessive pattern. In practical terms, MRPL35 gene inheritance usually means a child is affected only when they inherit one disease-causing variant from each parent. Parents who each carry one MRPL35 variant are typically unaffected carriers, and with each pregnancy there is a 25% chance of having an affected child, a 50% chance of having a carrier child, and a 25% chance of having a child who inherits neither variant. Because the MRPL35 gene is on an autosome, this pattern is the same for sons and daughters.
What does my MRPL35 result mean for my family?
For families with a disease-causing change in MRPL35, the pattern is typically recessive. This usually means parents are healthy carriers, and brothers or sisters may also be carriers or, less often, may have the condition. Close relatives may want to learn whether the same family variant is present, especially when there is a history of similar symptoms or affected children.
Genetic information
Genetic testing
How you find out about variants
To find out whether you carry a variant in the MRPL35 gene, doctors use genetic testing for variants in the MRPL35 gene on a blood sample, saliva, or cheek swab. This usually involves sequencing, which reads the DNA code. Results may show a variant linked to disease, an unclear result, or no relevant variant.
When should I consider getting a genetic test?
Genetic testing for the MRPL35 gene may be considered when someone has unexplained signs of a rare inherited mitochondrial condition, such as developmental delay, low muscle tone, seizures, or problems affecting several organs. It can also help when a close relative has a known MRPL35 variant.
A genetic result is only one part of your health story
Genetic findings can provide useful information, but how much they reveal varies by the condition and the specific kind of variant. Over time, many factors, including lifestyle, surroundings, age, and medical history, influence how the body functions. For some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is most useful when considered alongside other parts of care. In other situations, a genetic result can give a clear answer. In areas like medication response, it can also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how your body handles medicines, so the same treatment may work differently from one person to another. These inherited differences can change how a drug is processed and cleared, which may influence how well it works or how sensitive you are to side effects. This is a common part of normal human variation and helps explain why medication response is not the same for everyone.
What is Pharmacogenetics?
Pharmacogenetics examines how differences in a person’s genes affect the way medications work. It studies gene-drug relationships to understand why the same treatment can have different effects in different people. For many medicines, genes influence how strongly a drug works or how the body handles it. This information can support more personalized and better informed treatment decisions. More detail on this topic is available in the LearnHub.
Drugs influenced by the MRPL35 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 how people respond to treatment. Questions about side effects, new symptoms, or changes to any medication are best discussed with your doctor.