WWC1 rs17070213: Understanding the KIBRA Gene and Memory
The rs17070213 variant is a polymorphism located within the WWC1 gene, which encodes the KIBRA protein. Research has investigated its potential association with episodic memory performance and hippocampal function, though findings across different populations remain mixed.
What each genotype means
Typical baseline memory performance
You carry two copies of the C allele for this WWC1 (KIBRA) variant. In scientific literature, individuals with the CC genotype have often demonstrated typical episodic memory scores compared to carriers of the T allele. However, overall evidence is limited and mixed, with many replication studies showing minimal or no detectable difference in everyday cognitive function.
Carried by approximately 45% to 55% of individuals of European descent and represents the majority genotype in most global populations.
Modestly enhanced episodic memory
You carry one copy of the T allele and one copy of the C allele. Several studies have associated the presence of the T allele with subtle advantages in delayed recall and episodic memory tasks. However, these associations represent small population-level statistical differences, and findings have been inconsistent across independent research cohorts.
Carried by roughly 35% to 45% of people of European ancestry, but is observed at lower frequencies in East Asian and African populations.
Modestly enhanced episodic memory
You carry two copies of the T allele for this marker. Genetic association studies have grouped TT individuals with CT carriers, finding modest statistical links to improved recollection-based memory performance. The effect size in healthy adults is subtle, and findings remain debated due to non-replications across varied study populations.
Found in approximately 5% to 12% of individuals of European ancestry and is relatively uncommon worldwide.
What is the rs17070213 Variant?
The rs17070213 variant is a single-nucleotide polymorphism (SNP) situated within the WWC1 gene, also known as the KIBRA gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is located in a region of the gene that has been the subject of extensive study regarding its potential influence on cognitive traits. While many studies focus on the well-known rs17070145 SNP in the same gene, rs17070213 is part of the broader genetic landscape of the WWC1 locus. Geneticists study these variations to understand how subtle differences in our DNA code might correlate with differences in brain function, such as how we store and retrieve memories. Because this variant is located in a non-coding region of the gene, researchers often investigate whether it acts as a regulatory element that influences how much KIBRA protein is produced or how the gene is expressed in different brain tissues.
The Role of the WWC1 (KIBRA) Gene
The WWC1 gene provides instructions for making the KIBRA protein, which stands for Kidney/Brain protein. KIBRA acts as a scaffolding protein, meaning it helps organize other proteins within cells. In the brain, KIBRA is highly expressed in the hippocampus, a region critical for forming new memories. It plays a vital role at excitatory synapses, where it interacts with various proteins to regulate the trafficking and stability of receptors, such as AMPA-type glutamate receptors. By stabilizing these receptors, KIBRA helps maintain the strength of synaptic connections, a process fundamental to learning and memory. Beyond its role in the brain, the protein is also involved in cellular signaling pathways that control cell growth and polarity. Because of its presence in the hippocampus and its role in synaptic plasticity, scientists have long hypothesized that variations in the WWC1 gene could contribute to individual differences in cognitive performance, particularly in tasks involving episodic memory.
Research Associations and Evidence Strength
The association between WWC1 variants and memory is a complex area of study. Early research suggested that certain alleles in the KIBRA gene were linked to enhanced episodic memory performance and differences in hippocampal activation during memory tasks. However, the evidence strength for these associations is considered limited and inconsistent. While some studies have reported significant correlations between specific genotypes and memory scores, others have failed to replicate these findings in different cohorts or age groups. Furthermore, some research has explored whether these variants influence the risk of cognitive decline or Alzheimer's disease, but results have been mixed, with some studies showing no clear link. It is important to note that cognitive performance is a polygenic trait, meaning it is influenced by thousands of genetic variants, environmental factors, and lifestyle choices. Consequently, the effect of any single SNP like rs17070213 is likely very small, and findings from one study may not necessarily apply to all populations or individuals.
Population Frequency and Interpretation
The frequency of alleles for WWC1 variants can vary significantly across different ancestral populations. For rs17070213, the T allele is observed with a frequency of approximately 0.25 to 0.35 in European populations. Understanding these frequencies is essential for researchers to ensure that genetic studies are representative and to avoid drawing broad conclusions from limited data. When interpreting information about this variant, it is crucial to recognize that genetic associations are statistical in nature and do not imply a direct cause-and-effect relationship for any individual. A person's genotype at this locus does not determine their memory capacity or cognitive health. Because the evidence is mixed and the effect sizes are generally small, this information is currently considered to be of scientific interest rather than clinical utility. It cannot be used to predict personal cognitive outcomes or diagnose any condition. Always consult with a qualified healthcare professional or genetic counselor if you have concerns about your cognitive health or family history.
How common is this variant?
The T allele for this variant has a frequency of approximately 0.25 to 0.35 in European populations, though frequencies can differ across other ancestral groups.
Frequently asked questions
Can this genetic test tell me if I will get Alzheimer's disease?
No. This variant is not a diagnostic tool for Alzheimer's disease. Cognitive health is influenced by a complex combination of genetics, environment, and lifestyle, and this SNP does not provide a clinical prediction of disease risk.
Does my genotype mean I have a better or worse memory?
Not necessarily. While some research has explored links between WWC1 variants and memory performance, the findings are inconsistent. Your genotype does not determine your memory ability, and many other factors play a much larger role.
Should I change my lifestyle based on this genetic result?
No. You should not make health or lifestyle changes based on this variant. If you have concerns about your memory or cognitive function, please speak with a healthcare provider for a proper evaluation.
Why do different studies show different results for this gene?
Genetic studies often show different results due to variations in study design, the age and ancestry of the participants, and the specific memory tests used. This is common in complex trait research where the effect of a single gene is very small.
Sources & further reading
Educational information only, last refreshed 10/28/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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