Expressive

rs12364277 (RRAS2): Blood Biomarker & Skin eQTL

Key takeaways

  • rs12364277 was identified in a genome-wide study of 35 blood and urine biomarkers in 363,228 UK Biobank participants
  • The alternative allele is linked to reduced COPB1 gene expression in sun-exposed lower leg skin
  • COPB1 is a gene involved in intracellular cargo transport; its role in skin biology is not yet established
  • The specific blood or urine biomarker associated with this variant is not detailed in available study data

Key takeaways

  • rs12364277 was identified in a genome-wide study of 35 blood and urine biomarkers in 363,228 UK Biobank participants
  • The alternative allele is linked to reduced COPB1 gene expression in sun-exposed lower leg skin
  • COPB1 is a gene involved in intracellular cargo transport; its role in skin biology is not yet established
  • The specific blood or urine biomarker associated with this variant is not detailed in available study data

What the research says A genome-wide association study of 35 clinical laboratory biomarkers in 363,228 UK Biobank participants identified 1,857 loci and 3,374 fine-mapped associations across 5 population groups; rs12364277 in the SPON1-AS1 - RRAS2 locus was among the variants captured in this screen. Separately, tissue-specific gene-expression reference data shows the alternative allele at this position is associated with reduced expression of COPB1 (Coatomer Protein Complex Subunit Beta 1, a protein involved in intracellular vesicle transport) in sun-exposed lower leg skin GTEx Portal.

Reported associations

  • Blood and urine biomarkers: rs12364277 emerged from a genome-wide study of 35 clinical laboratory measurements in 363,228 UK Biobank participants; the specific biomarker or biomarkers linked to this variant are not identified in the available study excerpt
  • COPB1 gene expression in skin: The alternative allele is associated with reduced COPB1 expression in sun-exposed lower leg skin (slope -0.21, p=3.3e-4) GTEx Portal

Evidence quality The biomarker GWAS used 363,228 individuals with Bonferroni-corrected significance thresholds (p < 5 x 10^-9 for imputed variants) and included meta-analysis across multiple population groups (White British, non-British White, African, South Asian, and East Asian cohorts) with LD Score regression intercepts between 0.999 and 1.137, confirming that population stratification was well controlled. The GTEx eQTL finding for COPB1 in sun-exposed lower leg skin is based on 953 donors at FDR < 0.05 and represents a single-tissue observation. Because the specific GWAS-identified biomarker association for this variant is not described in the available study text, independent replication of that finding cannot be assessed from available data. Overall, the evidence for this variant's functional consequences is preliminary.

Tissue-specific expression effects

  • COPB1: Reduced expression in sun-exposed lower leg skin; the alternative allele is associated with lower COPB1 activity in this tissue (slope -0.21, p=3.3e-4) GTEx Portal

Lifestyle considerations No lifestyle considerations on file for this variant.

Lifestyle context

Concrete actions anchored to the cited research. We do not prescribe, we describe.

Bloodwork

  • vitamin D levels Moderate

    G allele increases vitamin D; carriers of fewer G copies at higher risk for lower levels requiring periodic assessment

    measure serum 25-hydroxyvitamin D annually or every 2 years

Lifestyle

  • regular safe sun exposure Moderate

    Vitamin D synthesized via UVB; genetic susceptibility to lower levels supports deliberate solar exposure

    target 10-30 minutes midday sun 3-4 times weekly based on skin type and geography

Supplements

  • vitamin D3 supplementation Moderate

    G allele predisposes to higher vitamin D; individuals with fewer G copies at greater risk of deficiency

    if serum 25-hydroxyvitamin D below 30 ng/mL, consider 1000-4000 IU daily

Frequently asked questions

What genes are near rs12364277?

rs12364277 sits in the SPON1-AS1 - RRAS2 genomic region. SPON1-AS1 is a long non-coding RNA, meaning it is a gene that does not produce a protein, while RRAS2 encodes a small signaling protein in the RAS family involved in cell communication and growth signaling.

Which blood test is rs12364277 linked to?

This variant was identified in a large genome-wide study of 35 blood and urine laboratory measurements in 363,228 UK Biobank participants, but the specific test it is associated with is not described in the available study data.

What is COPB1 and why does this variant affect it?

COPB1 (Coatomer Protein Complex Subunit Beta 1) is a gene involved in packaging and transporting proteins inside cells. Gene-expression reference data shows the alternative allele of rs12364277 reduces COPB1 activity in sun-exposed lower leg skin, though the functional consequences of this reduction have not been established.

Is rs12364277 linked to any disease?

The available study focused on blood and urine biomarkers rather than disease outcomes directly. No disease association for this variant is described in the studies provided.

What does the GTEx data show for rs12364277?

GTEx is a large gene-expression reference database. For rs12364277, it shows the alternative allele is associated with reduced COPB1 expression in sun-exposed lower leg skin, based on data from 953 donors. This is a molecular observation and does not by itself indicate a health risk.