MAOA rs1800495: Understanding This Genetic Variant
The rs1800495 variant is a synonymous polymorphism located within the MAOA gene, which encodes an enzyme responsible for breaking down key neurotransmitters. Research has investigated its potential associations with monoamine metabolism, behavioral traits, and individual responses to antidepressant medications.
What each genotype means
Typical MAOA metabolic profile
This genotype represents one of the common variations in the MAOA gene. Research into this variant often focuses on how it may interact with environmental factors to influence neurotransmitter metabolism, though evidence remains limited and mixed regarding its direct impact on behavioral traits. Please discuss any concerns regarding medication response or behavioral health with your clinician.
This genotype is common, appearing in a significant portion of the global population alongside the CT and TT variants.
Typical MAOA metabolic profile
This genotype represents one of the common variations in the MAOA gene. Research into this variant often focuses on how it may interact with environmental factors to influence neurotransmitter metabolism, though evidence remains limited and mixed regarding its direct impact on behavioral traits. Please discuss any concerns regarding medication response or behavioral health with your clinician.
This genotype is common, appearing in a significant portion of the global population alongside the CC and TT variants.
Typical MAOA metabolic profile
This genotype represents one of the common variations in the MAOA gene. Research into this variant often focuses on how it may interact with environmental factors to influence neurotransmitter metabolism, though evidence remains limited and mixed regarding its direct impact on behavioral traits. Please discuss any concerns regarding medication response or behavioral health with your clinician.
This genotype is common, appearing in a significant portion of the global population alongside the CC and CT variants.
What is rs1800495?
The rs1800495 variant is a single nucleotide polymorphism (SNP) situated within the MAOA gene. In genetics, a synonymous polymorphism means that the change in the DNA sequence does not alter the amino acid sequence of the resulting protein. Because the protein structure remains unchanged, researchers often study such variants to see if they influence gene expression, mRNA stability, or other regulatory processes. This specific SNP is located on the X chromosome, which is significant because males have only one copy of the X chromosome, while females have two. Consequently, genetic variations on the X chromosome can have distinct inheritance patterns and functional implications depending on an individual's biological sex.
The Role of the MAOA Gene
The MAOA gene provides instructions for making the monoamine oxidase A enzyme. This enzyme plays a critical role in the nervous system by breaking down (oxidizing) neurotransmitters such as serotonin, norepinephrine, and dopamine. By regulating the levels of these chemical messengers, the MAOA enzyme helps maintain balance in brain signaling. When MAOA activity is significantly altered, it can impact mood, behavior, and cognitive function. While the most famous research on this gene involves a variable number tandem repeat (uVNTR) in the promoter region, SNPs like rs1800495 are studied to understand how subtle genetic differences might contribute to the overall regulation of this essential metabolic pathway.
Research and Evidence Strength
Scientific evidence linking rs1800495 to specific clinical outcomes is currently considered limited. While some studies have explored its potential role in behavioral traits or antidepressant response, these findings are often mixed or require larger, more diverse cohorts to confirm. It is important to distinguish between statistical associations observed in research studies and direct causation. Many factors, including environmental influences, early life experiences, and the complex interplay of thousands of other genes, contribute to human behavior and health. Because the evidence for this specific SNP is not definitive, it should not be used to predict personal health outcomes or diagnose psychiatric conditions. Always consult with a qualified healthcare professional or pharmacist regarding any questions about medication response or mental health.
What You Can Do With This Information
Genetic information can be a powerful tool for understanding human biology, but it is essential to approach it with a clear perspective. Knowing your genotype for rs1800495 does not provide a medical diagnosis or a reliable prediction of your personality or future health. If you are interested in how your genetics might influence your response to medications, the most productive step is to have a conversation with your doctor or a clinical pharmacist. They can interpret genetic data within the context of your full medical history, current symptoms, and other clinical factors. Avoid making health decisions based solely on raw genetic data, as the science is still evolving and individual results are rarely determined by a single genetic variant.
How common is this variant?
The rs1800495 variant is common, with a minor allele frequency (MAF) typically reported between 0.35 and 0.45 across diverse global populations.
Frequently asked questions
Is rs1800495 the same as the 'Warrior Gene'?
No, the term 'Warrior Gene' typically refers to a different genetic feature known as the MAOA-uVNTR, which is a repeat sequence in the promoter region of the gene. rs1800495 is a single nucleotide polymorphism and is distinct from the uVNTR.
Can this SNP predict my risk for depression?
No. While some research explores the role of MAOA variants in mood disorders, no single SNP can reliably predict an individual's risk for depression. Mental health is influenced by a complex combination of genetics, environment, and life experiences.
Should I change my medication based on this result?
Absolutely not. Never change your medication dosage or stop taking a prescribed treatment based on genetic test results without consulting your doctor or pharmacist. They are the only ones qualified to adjust your treatment plan.
Where can I find more information on MAOA?
You can find reliable, peer-reviewed information on the MAOA gene through resources like MedlinePlus Genetics, the NIH's PubMed database, and the GWAS Catalog. These sites provide summaries of current scientific understanding.
Sources & further reading
Educational information only, last refreshed 9/20/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Synonymous coding variant (R297R) in MAOA that correlates with enzyme activity levels, monoamine metabolism, and response to selective serotonin reuptake inhibitors.
This variant in the monoamine oxidase A gene is associated with higher anxiety scales in individuals with low resilience to psychological stress.