ESR1 rs544850971: Understanding This Regulatory Variant
The rs544850971 variant is a genetic change located near the regulatory regions of the ESR1 gene. It is currently studied for its potential role in modulating how transcription factors bind to DNA and its possible influence on reproductive potential.
What each genotype means
Typical regulatory binding profile
You carry two copies of the common C allele near the ESR1 regulatory region. Research associates this baseline genotype with standard estrogen receptor alpha gene expression and typical reproductive endocrine markers. Because this is the wild-type reference genotype, no altered transcription factor activity or elevated variant-associated reproductive traits have been observed.
Carried by more than 99.8% of individuals across all major global populations.
Altered regulatory binding potential
You carry one copy of the rare T alternative allele adjacent to the ESR1 regulatory locus. Preliminary functional studies suggest this substitution may modestly modulate transcription factor binding affinity and downstream estrogen signaling pathways. However, because evidence for its clinical impact on reproductive traits remains limited and non-diagnostic, individual outcomes vary widely.
Extremely rare; found in fewer than 1 in 1,000 individuals globally according to gnomAD frequency data.
Variant regulatory binding profile
You carry two copies of the rare T alternative allele at this ESR1-associated site. Computational and exploratory research models suggest potential disruption of canonical regulatory protein binding, which may impact estrogen receptor-mediated transcriptional activation. Given the scarcity of homozygous individuals in published studies, the precise physiological significance remains largely uncharacterized.
Exceedingly rare globally, with an estimated prevalence of less than 1 in 1,000,000 individuals.
What is rs544850971?
The variant rs544850971 is a single nucleotide polymorphism (SNP) situated in the genomic neighborhood of the ESR1 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is located adjacent to canonical regulatory regions of the ESR1 gene, which are segments of DNA that act as switches to control when and how much of a gene's product is made. Because it sits in a regulatory area rather than within the protein-coding sequence itself, researchers investigate it primarily for its potential to alter the binding affinity of transcription factors—proteins that help turn genes on or off. By changing the landscape of these regulatory sites, variants like rs544850971 may influence the precision of gene expression, though the functional consequences of this specific change are still being explored by the scientific community.
The Role of the ESR1 Gene
The ESR1 gene provides instructions for making a protein called estrogen receptor alpha (ERα). This protein is a nuclear hormone receptor that acts as a ligand-activated transcription factor. When estrogen binds to the receptor, the complex moves into the cell nucleus, where it binds to specific DNA sequences known as estrogen response elements (EREs). This binding process regulates the transcription of numerous genes involved in critical biological pathways, including cellular growth, metabolism, sexual development, and gestation. Beyond its role in reproductive tissues, ESR1 is expressed in various other tissues, including bone and the brain, where it supports neuronal survival and bone density maintenance. Because of its central role in these processes, variations in the ESR1 gene are frequently studied for their potential links to hormone-dependent conditions, such as breast cancer, osteoporosis, and cardiovascular health.
Research and Evidence Strength
Current evidence regarding rs544850971 is classified as moderate. It has been identified in genomic catalogs as a potential modulator of transcription factor binding, which suggests it may play a role in fine-tuning the expression of the ESR1 gene. However, unlike some well-characterized variants that have clear, established clinical impacts, the functional data for rs544850971 is still emerging. Most research on ESR1 variants focuses on their association with complex traits or disease susceptibility, such as breast cancer risk or bone mineral density. It is important to note that genetic associations are statistical in nature and do not imply a direct cause-and-effect relationship for any individual. Because the evidence is currently limited, scientists continue to study how this specific variant might interact with other genetic and environmental factors to influence human health and reproductive biology.
Population Frequency
According to data from the Genome Aggregation Database (gnomAD), the minor allele frequency (MAF) for rs544850971 is less than 0.001. This indicates that the variant is quite rare across the diverse populations represented in global genomic databases. Because the frequency is so low, it is difficult to draw broad conclusions about its distribution across different ancestral groups. In many cases, rare variants are only identified through large-scale sequencing efforts, and their impact may be specific to certain families or populations. The low frequency also means that there is limited statistical power to conduct large-scale association studies, which is why the current understanding of its clinical significance remains preliminary. Researchers rely on these frequency metrics to prioritize which variants warrant further functional investigation in laboratory settings.
Interpreting Your Genetic Information
If you have encountered this variant in a personal genetic report, it is important to understand that this information is for educational purposes only. Genetic variants like rs544850971 are often identified in research contexts and do not constitute a medical diagnosis or a prediction of future health outcomes. Many factors, including lifestyle, environment, and the rest of your genetic makeup, contribute to your overall health. You cannot use this information to make medical decisions, such as starting or stopping medications or hormone therapies. If you have concerns about your reproductive health, bone density, or other conditions related to estrogen signaling, the best course of action is to consult with a qualified healthcare provider or a genetic counselor. They can help you interpret your health history in the context of your overall well-being and provide guidance based on established clinical standards.
How common is this variant?
The rs544850971 variant is rare, with a minor allele frequency (MAF) of less than 0.001 across populations in the gnomAD database.
Frequently asked questions
Is rs544850971 associated with a specific disease?
Currently, rs544850971 is identified as a potential regulatory variant, but it is not definitively linked to any specific disease. Research is ongoing to determine if it influences gene expression related to reproductive traits.
Should I be worried if I have the G allele?
No, you should not be worried. Genetic variants are common, and having a specific allele does not mean you will develop a health condition. This variant is a subject of scientific study, not a clinical diagnostic marker.
Can I use this information to change my diet or lifestyle?
No. Genetic information regarding this variant is not actionable for lifestyle or dietary changes. Always consult with a healthcare professional before making significant changes to your health regimen.
Where can I find more information about ESR1?
You can visit resources like MedlinePlus Genetics or the NCBI Gene database for comprehensive, peer-reviewed information about the ESR1 gene and its known functions in the human body.
Sources & further reading
Educational information only, last refreshed 10/19/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs544850971?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants in ESR1
This variant in the estrogen receptor 1 gene is associated with human reproductive behavior and influences estrogen-responsive gene expression.
This variant in the estrogen receptor 1 gene is associated with an increased risk of endometriosis and may influence cognitive aging.
Estrogen receptor 1 variant associated with altered circulating estradiol levels, follicular maturation, and variability in age at natural menopause.
Variant in estrogen receptor 1 associated with variation in female reproductive timing, including age at menarche and natural menopause onset.
Common polymorphism in estrogen receptor alpha (ESR1) affecting target tissue responsiveness to estrogen, recurrent pregnancy loss risk, and bone-reproductive axis interactions.
Estrogen receptor 1 regulatory variant associated with variation in timing of menarche and bone density response to sex hormones.