The RPSA gene helps your cells make proteins, which are needed for growth, repair, and daily cell function. Certain variants in the RPSA gene can cause isolated congenital asplenia, a condition where a person is born without a spleen or with a very small one. This gene plays an important role in early development, and when it is not working properly, the body may have more trouble clearing certain bacteria from the blood. Because the spleen helps fight infection, people with this condition can have a higher chance of severe bacterial infections.
What is a gene?
A gene is a section of DNA that carries instructions your cells use to make molecules or regulate processes in the body. Some genes provide the information needed to produce proteins, the parts of cells that do the work. Others mainly direct when certain processes take place, 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, and medications. For a closer look at this topic, you can find more in the LearnHub.
Overview
RPSAGene function
What if the gene works
Your cells use the RPSA gene to make part of the ribosome, the cell’s protein-making machinery. This helps cells read genetic instructions and build proteins needed for growth, upkeep, and normal body function.
Risk
What if the gene does not work
Variants in the RPSA gene can cause isolated congenital asplenia, with no spleen at birth and a higher risk of bacterial infections. Milder and more severe variants may partly explain why some people stay well while others become ill early.
Treatment
What does that mean for your treatment
A pathogenic variant in the RPSA gene does not point to a targeted drug. It supports standard congenital asplenia care, which usually includes vaccines against pneumococcus, meningococcus, and Haemophilus influenzae type b, preventive penicillin or amoxicillin in many children, and urgent antibiotics for any fever.
Conditions associated with RPSA
Gene function
What if the gene works
Your cells rely on the RPSA gene to keep protein production moving. It helps build and operate ribosomes, the tiny structures that read RNA instructions and assemble proteins. This steady process supports routine cell growth, renewal, and day to day body function.
The RPSA gene provides part of the small ribosome subunit, one half of your cell's protein making machinery. This helps cells turn RNA messages into proteins needed for normal structure and function.
Its protein helps the ribosome attach to messenger RNA, the working copy of a gene's instructions. That support is central to how the RPSA gene helps make proteins throughout the body.
This protein also supports the early assembly and stability of small ribosomal subunits before they begin reading RNA. That keeps protein production orderly and efficient in many kinds of cells.
What is a variant?
A genetic variant is a slight difference in the DNA sequence of a gene. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not have any noticeable effect and are simply part of natural genetic variation. Sometimes, though, a variant can change how a gene works more significantly and may contribute to or lead to a genetic condition.
Genetic variants
What if the gene does not work
Variants in the RPSA gene can lower the amount of working RPSA protein or change its shape, which may weaken the ribosome (the cell's protein-making machine). In plain terms, how RPSA gene variants affect protein production depends on the change: some are milder and partly reduce function, while more disruptive variants can markedly cut activity from one gene copy. In people with isolated congenital asplenia, stronger loss of function is more often linked to a clearer effect on spleen development.
How variants are linked to conditions
Pathogenic variants in the RPSA gene are a well established cause of isolated congenital asplenia, a condition present from birth in which the spleen is absent. In families affected by RPSA gene variants linked to isolated congenital asplenia, some people are diagnosed after severe bacterial infections, while others have few or no warning signs. A confirmed pathogenic variant can support or confirm the diagnosis.
A variant is not necessarily a diagnosis
Genetic variants are a usual feature of human biology and are widely found across the population. Most do not directly affect health and instead reflect normal human variation. For many genes, having a variant associated with a condition points to a possible link, not a certain diagnosis, particularly when several genes and environmental influences play a role. In contrast, some situations involve one well-characterized variant in a particular gene that 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 RPSA gene. In families with a disease-causing RPSA change, risk is mainly shaped by the inherited variant itself, and anyone concerned about personal or family risk should speak with a doctor or genetic counselor.
Inheritance of RPSA variants
RPSA gene variants linked to RPSA-related isolated congenital asplenia are usually inherited in an autosomal dominant pattern. This means a child can inherit the variant from either parent, and each pregnancy carries a 50% chance of passing it on. In practical terms, mothers and fathers can pass an RPSA gene variant to sons or daughters alike. Some families asking how RPSA gene variants are inherited also learn that not everyone who carries the variant is affected in the same way, so the family pattern can look uneven across generations.
What does my RPSA result mean for my family?
For RPSA, a gene result can matter for close relatives because this condition can run in families in a dominant pattern. Parents, brothers, sisters, and children may also carry the same change, even if they feel well, because some people with an RPSA change do not show clear signs. This means family members may wish to talk with their care team about whether the result could also apply to them.
Genetic information
Genetic testing
How you find out about variants
To check for changes in the RPSA gene, doctors can use genetic testing for RPSA variants, usually with a blood or saliva sample. A lab reads the DNA code in the RPSA gene to look for variants that may help explain a person’s condition or show whether a change runs in the family.
When should I consider getting a genetic test?
Genetic testing for the RPSA gene can be worth considering if you or your child were born without a spleen, especially with a family history of the same finding or severe infections. A result can help confirm the cause and guide family testing and infection-prevention planning.
A genetic result is only one part of your health story
Genetic findings can provide useful insight, but how much they reveal depends on the condition and on the type of variant involved. Over time, many factors, including lifestyle, environment, age, and medical history, shape how the body functions. In some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is best understood together with other parts of care. In other situations, a genetic result may give a clear answer. In areas such as medication response, genetic results can help place a person’s individual experiences in perspective.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. One person may break down a drug more slowly, while another may process it faster or be more sensitive to its effects. These differences are common and can influence how well a treatment works or how likely side effects are. Genes are only part of the picture, and age, other health conditions, and other medicines also play a role.
What is Pharmacogenetics?
Pharmacogenetics is the area of study that examines how genetic differences can affect the way people respond to medications. It looks at relationships 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 processes it. This information can help support treatment decisions that are both better informed and more individualized. To explore this subject in greater depth, you can learn more in the LearnHub.
Drugs influenced by the RPSA gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how people respond to medicines, so general questions about treatment, side effects, or new symptoms are best discussed with your doctor or pharmacist.
History
RPSA entered the research literature through two lines of study that later came together. In the late 1980s and early 1990s, scientists described it both as a ribosomal protein and as a laminin receptor, which led to years of discussion about whether these findings involved the same molecule. Building on this early work, scientists uncovered more about the gene and gradually settled the naming and classification. A major clinical milestone came in 2013, when harmful variants in the RPSA gene were linked to isolated congenital asplenia, a condition present from birth in which the spleen is absent. That discovery connected earlier family patterns to a specific gene and gave doctors a clearer genetic explanation for a rare inherited condition.