ABCC6 rs72653791: Understanding Your Carrier Status
The genetic variant rs72653791 is an exonic missense single nucleotide polymorphism located in the ABCC6 gene. It has been reported in clinical databases and scientific literature in individuals with pseudoxanthoma elasticum (PXE), a rare autosomal recessive metabolic disorder affecting connective tissues. Because PXE is inherited recessively, carrying a single copy of this rare alterative allele generally designates carrier status rather than active clinical disease.
What each genotype means
Typical ABCC6 genotype
This genotype represents the most common genetic sequence found at this position in the ABCC6 gene. It is not associated with the development of autosomal recessive pseudoxanthoma elasticum (PXE).
This is the most common genotype observed in the general population.
Carrier of ABCC6 variant
You carry one copy of this variant, which is associated with autosomal recessive pseudoxanthoma elasticum (PXE). Because PXE is an autosomal recessive condition, carrying a single copy typically does not cause the disease, though you should discuss any family history of connective tissue or vascular conditions with a healthcare provider.
This genotype is rare, consistent with the variant's overall low frequency in general populations.
Potential ABCC6 variant homozygote
This genotype indicates the presence of two copies of the variant. Because mutations in the ABCC6 gene are linked to autosomal recessive pseudoxanthoma elasticum (PXE), individuals with this genotype may be at increased risk for clinical symptoms associated with the condition. Please consult with a medical geneticist or physician to discuss these findings in the context of your personal and family health history.
This genotype is extremely rare in the general population.
Genomic Location and Variant Classification
The rs72653791 variant is a missense single nucleotide polymorphism situated within an exon of the ABCC6 gene on chromosome 16p13.11. In the genetic code, a missense alteration changes a single base pair, which causes an amino acid substitution in the resulting multidrug resistance-associated protein 6 (MRP6). Public genomic repositories such as dbSNP, ClinVar, and the Genome Aggregation Database (gnomAD) catalog this variant. Sequence analysis of ABCC6 can be technically challenging due to adjacent pseudogenes (ABCC6P1 and ABCC6P2) that share high sequence similarity, requiring careful analytical validation in clinical sequencing pipelines. In curated repositories, rs72653791 is assessed predominantly in the context of rare inherited mineralization disorders.
Biological Role of the ABCC6 Transporter
The ABCC6 gene provides the genetic blueprint for MRP6, an ATP-binding cassette transporter primarily synthesized in hepatocytes in the liver and proximal tubule cells in the kidneys. Although its direct transported substrates remain an active area of study, functional cellular research demonstrates that ABCC6 plays an essential regulatory role in cellular adenosine triphosphate (ATP) release into the bloodstream. Once released into circulation, extracellular ATP is enzymatically cleaved into inorganic pyrophosphate (PPi). Pyrophosphate serves as a critical systemic inhibitor of ectopic tissue calcification. When ABCC6 function is severely compromised on both alleles, circulating pyrophosphate concentrations plummet, permitting aberrant calcium and mineral deposition within elastic fibers throughout the body.
Associated Health Conditions and Evidence Strength
Biallelic loss-of-function variations in ABCC6 are established causes of pseudoxanthoma elasticum (PXE), a recessive condition characterized by progressive mineralization of elastic fibers in the skin, retinal Bruch membrane (causing angioid streaks), and arterial walls. The current clinical evidence linking rs72653791 specifically to disease is classified as limited. While reported in individuals clinically evaluated for PXE, many missense variants in ABCC6 lack definitive functional validation and may initially be designated as variants of uncertain significance (VUS). In an autosomal recessive inheritance model, an individual must inherit two pathogenic variants (one on each chromosome) to develop PXE. A single copy does not cause classic PXE, although researchers continue to investigate whether carrier status subtly influences cardiovascular health.
Population Frequency and Ancestral Distribution
According to large-scale general population databases including gnomAD, rs72653791 is an exceptionally rare variant across world populations, with an overall allele frequency estimated at approximately 0.0001 (0.01%). It is found primarily in heterozygous states within massive reference cohorts, while homozygous individuals are generally absent from healthy reference data sets. Because rare missense variants in ABCC6 show variable frequencies across distinct ancestries and demographic groups, the rarity of rs72653791 aligns with typical pathogenic or unclassified alleles reported in specialized registries for rare connective tissue disorders.
Navigating Results: What This Information Means for You
Consumer or secondary genetic findings reporting rs72653791 should be approached with context. Direct-to-consumer genotyping platforms are not diagnostic instruments and carry risks of false-positive calls, particularly for rare exonic variants. Finding this variant in a single copy typically indicates putative carrier status rather than a medical diagnosis of pseudoxanthoma elasticum. Carrying a single allele does not predict clinical disease. Anyone with a personal or familial history of early-onset vascular calcification, unexplained vision changes, or skin elasticity alterations should share their raw reports with a board-certified genetic counselor or physician for clinical-grade Sanger or targeted panel re-sequencing before taking any clinical action.
How common is this variant?
The rs72653791 variant is rare in the general population, with an estimated global minor allele frequency of approximately 0.0001 (about 0.01%) in aggregate reference databases such as gnomAD.
Frequently asked questions
What is ABCC6 rs72653791?
ABCC6 rs72653791 is a rare missense genetic variant located in the ABCC6 gene on chromosome 16. It alters a single amino acid in the MRP6 transporter protein and has been reported in individuals evaluated for pseudoxanthoma elasticum (PXE).
Does carrying rs72653791 mean I have pseudoxanthoma elasticum?
No, pseudoxanthoma elasticum is an autosomal recessive disorder that requires disease-causing variants on both copies of the ABCC6 gene. A single copy of rs72653791 would only reflect carrier status, and current scientific evidence linking this specific variant to disease is classified as limited.
Are carriers of ABCC6 variants at higher risk for heart problems?
Some observational studies have suggested that having a single non-working copy of the ABCC6 gene might slightly increase the risk of coronary artery disease. However, evidence varies significantly depending on the specific mutation, and carrier status for rs72653791 alone is not considered a standalone diagnostic marker for cardiovascular disease.
What should I do if my consumer DNA test reports this variant?
You should not make medical decisions or self-diagnose based on consumer raw data. Rare variants on consumer arrays can have notable rates of false positives, so consult a doctor or genetic counselor who can order certified clinical sequencing to verify the finding.
Sources & further reading
Educational information only, last refreshed 9/6/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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