GBA rs104894002: What Your Genotype Means
The rs104894002 variant is a specific genetic alteration located within the GBA gene. It is recognized in scientific literature as a risk factor associated with the development of Gaucher disease and an increased susceptibility to Parkinson's disease.
What each genotype means
Typical genetic profile
This genotype represents the most common form of the GBA gene found in the general population. It is not associated with the increased risk for Parkinson's disease or Gaucher disease linked to variants in this gene. No specific clinical action is required based on this result.
This is the most frequent genotype observed across all major global populations.
Increased risk factor
Carrying one copy of this variant is recognized as a genetic risk factor for Parkinson's disease and related conditions. While this increases the statistical likelihood of developing these conditions compared to the general population, it does not mean you will develop them, as penetrance is variable and influenced by other genetic and environmental factors. You should discuss your family history and any neurological concerns with your healthcare provider.
This genotype is found at varying frequencies depending on ancestry, being more common in certain populations such as those of Ashkenazi Jewish descent.
Elevated risk profile
Carrying two copies of this variant significantly increases the risk of developing Parkinson's disease or related lysosomal storage conditions compared to the general population. Because GBA-related conditions are complex and influenced by many factors, this result is not a diagnosis. It is recommended that you consult with a genetic counselor or neurologist to discuss the implications of this finding in the context of your personal and family health history.
This genotype is rare in the general population, though it may be more frequently observed in specific ethnic groups with higher carrier rates for GBA variants.
Understanding the rs104894002 Variant
The rs104894002 variant is a single nucleotide polymorphism (SNP) found within the GBA gene, which is located on chromosome 1. In genetic research, this variant is often studied for its impact on the structure and function of the protein encoded by this gene. Because the GBA gene is complex and contains a highly similar pseudogene nearby, identifying and analyzing specific variants like rs104894002 requires precise sequencing techniques to ensure accuracy. This variant represents a change in the DNA sequence that can alter the instructions for building the glucocerebrosidase enzyme. Researchers track these specific changes to understand how they contribute to biological variability and disease risk across different human populations.
The Role of the GBA Gene
The GBA gene provides instructions for producing an enzyme called glucocerebrosidase. This enzyme is primarily located in lysosomes, which are the recycling centers of cells. Its main job is to break down a fatty substance called glucocerebroside into simpler components, such as glucose and ceramide. When the GBA gene contains certain variants, the resulting enzyme may be less effective or unstable. This can lead to the accumulation of fatty substances within cells, which is the hallmark of Gaucher disease, a lysosomal storage disorder. Beyond this, research has increasingly shown that even when GBA variants do not cause Gaucher disease, they can still influence cellular health in ways that increase the risk of neurodegenerative conditions like Parkinson's disease.
Research and Disease Associations
Scientific evidence strongly links GBA variants to both Gaucher disease and Parkinson's disease. While Gaucher disease is typically inherited in an autosomal recessive pattern—meaning two copies of a pathogenic variant are usually required—the association with Parkinson's disease is more complex. Individuals who carry a single copy of certain GBA variants have been observed to have a higher statistical risk of developing Parkinson's disease compared to non-carriers. The strength of this association varies depending on the specific variant and the individual's genetic background. It is important to note that carrying a GBA variant does not mean an individual will definitely develop these conditions; rather, it indicates a higher statistical probability that researchers have identified through large-scale population studies.
Population Frequency and Variability
The frequency of GBA variants is not uniform across all human populations. Some variants are significantly more common in specific ethnic groups, such as the Ashkenazi Jewish population, where certain GBA mutations are well-documented. Because of this, the prevalence of rs104894002 and other GBA-related risks can vary widely depending on ancestry. Large-scale genomic databases like gnomAD provide data on how often these variants appear in the general population, but for many rare variants, data remains limited. This variability highlights the importance of considering ancestry when interpreting genetic risk. Researchers continue to study diverse cohorts to better understand how these frequencies influence global health outcomes and to refine the accuracy of risk assessments for different groups.
Interpreting Your Genetic Information
If you have information about your GBA genotype, it is essential to understand that genetic risk is only one piece of a much larger puzzle. Many factors, including environment, lifestyle, and other genetic markers, contribute to the development of complex conditions like Parkinson's disease. You cannot use this information to diagnose yourself or predict your future health with certainty. If you are concerned about your genetic risk or have a family history of Gaucher or Parkinson's disease, the most appropriate step is to consult with a certified genetic counselor or a medical professional. They can help you interpret your results in the context of your personal and family medical history and provide guidance on whether further clinical evaluation or monitoring is necessary.
How common is this variant?
The frequency of GBA variants is highly variable across different ancestral populations, with some variants showing significantly higher prevalence in specific groups like the Ashkenazi Jewish population.
Frequently asked questions
Does having a GBA variant mean I will get Parkinson's disease?
No, having a GBA variant does not mean you will definitely develop Parkinson's disease. It is considered a risk factor, meaning it statistically increases the likelihood, but many carriers never develop the condition.
What is the difference between Gaucher disease and Parkinson's disease in relation to GBA?
Gaucher disease is a rare lysosomal storage disorder typically caused by inheriting two copies of a pathogenic GBA variant. Parkinson's disease is a neurodegenerative condition where carrying even one GBA variant is associated with an increased risk.
Should I get tested for GBA variants?
Genetic testing for GBA variants is usually recommended only if there is a family history of Gaucher disease or Parkinson's disease. You should discuss the benefits and limitations of such testing with a doctor or genetic counselor.
Can I change my GBA genotype?
No, your genotype is determined at conception and cannot be changed. However, understanding your genetic profile can help you and your healthcare provider make informed decisions about your health monitoring.
Sources & further reading
Educational information only, last refreshed 10/3/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This variant is a known pathogenic mutation associated with carrier status for Gaucher disease type 1.
This variant is associated with an increased risk of developing Parkinson's disease.
This variant is associated with Gaucher disease, a lysosomal storage disorder.
This variant, also known as 84GG, is a pathogenic mutation associated with Gaucher disease.
This variant is associated with Gaucher disease, which can present with ocular manifestations including oculomotor apraxia.