The SRP68 gene helps cells route newly made proteins to the endoplasmic reticulum, the part of the cell that processes and ships many proteins. If this gene does not work properly, some proteins are not handled normally, which can disrupt how cells grow and function. People with harmful variants in both copies of the SRP68 gene can develop severe congenital neutropenia, a condition with very low infection-fighting white blood cells from birth. Understanding this gene can help clarify why some children have repeated infections and related growth or developmental concerns.
What is a gene?
Genes are sections of DNA that give your cells instructions for making molecules or managing activities 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 develops and functions, and they can influence how you respond to food, stress, and medications. More detailed information on this topic is available in the LearnHub.
Overview
SRP68Gene function
What if the gene works
The SRP68 gene helps cells guide certain newly made proteins to the right place, especially to the cell’s protein processing system. This supports normal protein handling and steady cell function.
Risk
What if the gene does not work
More disruptive variants in the SRP68 gene can cause a rare condition with very low neutrophils and repeated infections, sometimes alongside hearing loss or developmental differences. Milder variants may leave partial activity, which can influence severity and which features appear.
Treatment
What does that mean for your treatment
For pathogenic variants in the SRP68 gene, no SRP68-specific treatment or management approach is currently established in clinical guidelines.
Gene function
What if the gene works
Your cells constantly make proteins that need to reach the right location. The SRP68 gene supports this delivery process as part of a larger protein-guiding system. It is especially important for proteins headed to cell membranes or out of the cell. This helps explain how the SRP68 gene helps proteins reach the right place in the cell.
The SRP68 gene helps your cells identify newly made proteins that carry an internal address label. These are often proteins meant for a membrane or for release outside the cell.
Its protein helps guide the protein-making machinery to the endoplasmic reticulum (a cell compartment that folds and processes many proteins). This allows the growing protein to be handed over in an orderly way for further processing.
SRP68 works with other parts of the signal recognition particle, including SRP72 and a small RNA partner. Together, they keep this protein-delivery system stable and working smoothly across many tissues.
What is a variant?
A genetic variant is a slight difference in the DNA sequence within a gene. Variants 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 cases, though, a variant can change how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the SRP68 gene can make the SRP68 protein unstable, shortened, or less able to join the signal recognition particle, a protein guiding system. In practice, how SRP68 gene variants affect protein targeting inside the cell depends on where the DNA change sits. Milder variants may partly reduce activity, while more severe variants can prevent the protein from working at all or cause it to be broken down early. This can disrupt delivery of newly made proteins to the endoplasmic reticulum (the cell's protein processing area).
How variants are linked to conditions
Pathogenic variants in the SRP68 gene cause a rare inherited form of severe congenital neutropenia, sometimes described as SRP68-related severe congenital neutropenia. People with this condition have very low neutrophil counts and tend to have repeated infections from early life. Some may also have developmental delay, hearing changes, or growth differences, but these features vary from person to person.
A variant is not necessarily a diagnosis
Variants in genes are a routine feature of human biology and are widespread in the general population. Most do not directly affect health and simply reflect natural differences between people. For many genes, having a variant associated with a condition points to a possible link rather than a definite diagnosis, especially when several genes and environmental factors play a role. Still, in some situations, 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 health risk related to the SRP68 gene. Risk and symptoms seem to depend mainly on the specific gene change, and anyone with concerns about personal risk can discuss it with a doctor or genetic counselor.
Inheritance of SRP68 variants
For people looking into how SRP68 gene variants are inherited, there is not yet a single broadly confirmed Mendelian inheritance pattern tied to one well-established SRP68 related condition. Research is still building, and the inheritance picture may become clearer as more families are studied. The SRP68 gene is located on chromosome 17, which is an autosome, so you inherit one copy of the SRP68 gene from each parent.
What does my SRP68 result mean for my family?
There is not yet a broadly confirmed, condition-specific inheritance pattern for SRP68 that is used in routine patient care, and this understanding may change as research grows. If you have a specific SRP68 result and want to know what it could mean for your relatives, a doctor or genetic counselor can help explain it in the context of your family.
Genetic information
Genetic testing
How you find out about variants
For people looking into how SRP68 genetic testing works, a lab reads the DNA in a blood, saliva, or cheek swab sample to look for variants in the SRP68 gene. Results may find a variant that helps confirm a diagnosis or may be unclear and need interpretation with other clinical findings.
When should I consider getting a genetic test?
Testing for the SRP68 gene may be considered if someone has very low levels of infection-fighting white blood cells from early life, repeated serious infections, or a close relative with a confirmed SRP68-related condition. A doctor or genetic counselor can help decide whether SRP68 belongs in a broader inherited blood or immune testing panel.
A genetic result is only one part of your health story
A genetic result can provide useful insight, although what it can tell you varies by the condition and by the type of variant involved. How the body functions over time is also shaped by many factors, including lifestyle, environment, age, and medical history. For some conditions, especially those affected by many genes, genetic information gives context rather than certainty and is most helpful when viewed alongside other parts of care. In other situations, the result may offer a clear answer. In areas like 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 your body responds to medicines. This helps explain why the same treatment may work well for one person, seem less effective for another, or cause more side effects in someone else. These differences are common and often relate to how the body breaks down, moves, or responds to a drug.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences affect the way people respond to medications. It looks at the connection between genes and drugs to help explain why the same treatment can work differently from one person to another. For many medicines, genes play a part in how the body processes a drug and how strong its effects are. This information can support treatment decisions that are both more informed and more individualized. If you want to learn more about this topic, you can read further in the LearnHub.
Drugs influenced by the SRP68 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication response, so questions about side effects, treatment choices, or other health concerns are best discussed with your doctor.