CAST rs110914810: Genetic Marker and Trait Association
The genetic variant rs110914810 is a single nucleotide polymorphism located within the CAST gene. In human trait catalogs, it is categorized as a trait marker linked to physiological metrics including pregnancy maintenance and fertility efficiency phenotypes. With a minor allele frequency of approximately 0.38, it represents a common polymorphism rather than a rare, monogenic mutation.
What each genotype means
Typical calpastatin expression
This genotype represents the most common form of the CAST gene variant in many populations. Research into this specific variant has primarily focused on its role in biological processes like protein regulation, though its specific impact on human fertility or pregnancy maintenance remains an area of ongoing scientific investigation.
This is the most frequent genotype observed in populations where the C allele is dominant.
Heterozygous variant carrier
Carrying one copy of the G allele alongside the C allele is a common genetic variation. While some studies have linked CAST gene variations to complex physiological traits, current evidence is insufficient to suggest this specific genotype significantly alters health outcomes or fertility in humans.
This genotype is found in a significant portion of the population, consistent with the reported minor allele frequency of approximately 0.38.
Variant-associated genotype
This genotype contains two copies of the G allele. While the CAST gene is involved in essential cellular processes, the association of this specific variant with human fertility or pregnancy maintenance is based on limited evidence and requires further validation in human clinical studies.
This genotype occurs at a frequency consistent with the reported minor allele frequency of approximately 0.38 across various populations.
Genomic Location and Variant Characteristics
The single nucleotide polymorphism rs110914810 is situated within the calpastatin (CAST) gene. Reference catalogs like dbSNP index this locus as a naturally occurring, biallelic variation. Across human genomes, the locus alternates between specific nucleotide bases, most commonly reflected in the catalog through common diallelic states. Because it is a common variant with a minor allele frequency around 38%, it is cataloged as a neutral or benign common polymorphism in standard clinical databases rather than an actionable disease-causing mutation. Most single-base variations situated in large structural or regulatory genes do not abolish protein synthesis, but instead subtly modulate regional expression or pre-mRNA processing.
Biological Role of the Calpastatin (CAST) Gene
The CAST gene encodes calpastatin, an endogenous, highly specific inhibitor of calpains—a family of calcium-dependent neutral cysteine proteases. The calpain-calpastatin proteolytic cascade plays a central physiological role across mammalian tissues, regulating cytoskeletal remodeling, cell motility, membrane fusion, and signal transduction. In human and mammalian reproductive biology, fine-tuned remodeling of the cellular cytoskeleton and extracellular matrix is essential for endometrial receptivity, embryo implantation, and placental development. Consequently, polymorphisms that influence calpastatin expression or its ratio to calpain proteases are actively investigated for their subtle downstream effects on cellular plasticity and reproductive efficiency.
Current Scientific Evidence and Phenotypic Associations
Within functional trait registries, rs110914810 is curated as having moderate evidence linking it to pregnancy maintenance, reproductive capacity, and reproductive efficiency phenotypes. Research into the calpain-calpastatin system emphasizes that tissue homeostasis during gestational development requires precise cellular proteolysis. However, scientific evidence for rs110914810 remains primarily statistical rather than diagnostic. Like most trait-associated polymorphisms uncovered in large genomic association studies, the effect size is modest, meaning that possessing a specific genotype does not guarantee an adverse pregnancy outcome or superior reproductive efficiency, but rather accounts for a tiny fraction of background biological variation.
Population Frequency and Ancestral Distribution
Population genetics datasets, including the 1000 Genomes Project and gnomAD, indicate that rs110914810 is widespread globally, maintaining a minor allele frequency (MAF) of approximately 0.38. Because the minor allele is present in roughly 38% of alleles evaluated in population samples, homozygous and heterozygous genotypes are frequently observed across diverse populations. Standard ACMG/AMP clinical evaluation guidelines regard variants with population frequencies above 1% to 5% as stand-alone benign markers in monogenic diagnostic pipelines, confirming that rs110914810 reflects normal human diversity rather than an inherited genetic disorder.
What You Can and Cannot Do With This Information
Knowing your genotype at rs110914810 provides interesting biological context regarding your genetic profile, but it is not a medical diagnostic test. It cannot be used to confirm fertility status, predict pregnancy viability, or diagnose reproductive conditions like recurrent miscarriage. Reproductive health depends on complex multi-factorial interactions, including endocrine signaling, immunological factors, environmental conditions, and age. If you are experiencing fertility concerns, planning a family, or navigating pregnancy, you should consult an OB/GYN or reproductive endocrinologist rather than drawing clinical conclusions from single-variant direct-to-consumer genetic panels.
How common is this variant?
The rs110914810 variant is common across diverse populations, displaying a global minor allele frequency (MAF) of approximately 0.38. As such, both heterozygous and homozygous genotypes are routinely identified in standard population cohorts.
Frequently asked questions
Does my rs110914810 genotype mean I will experience fertility problems?
No. The statistical associations recorded for rs110914810 are trait-level correlations discovered in population cohorts, not clinical diagnostics. Carrying a specific allele does not predict infertility or pregnancy complications.
What does the CAST gene do in the human body?
The CAST gene produces calpastatin, a protein that regulates and inhibits calpain enzymes. Together, they control calcium-activated protein breakdown essential for cellular architecture, tissue remodeling, and cell survival.
Is rs110914810 considered a disease-causing mutation?
No, it is classified as a benign, common single nucleotide polymorphism with a minor allele frequency near 38%. It does not cause monogenic hereditary disorders.
Should I speak to a doctor about my rs110914810 genetic test result?
There is no clinical need to consult a physician solely about an rs110914810 result. However, if you have broader concerns about conception, pregnancy maintenance, or reproductive health, discussing comprehensive medical testing with a specialist is advised.
Sources & further reading
Educational information only, last refreshed 9/5/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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