rs201420507

This variant is located in the DIO1 gene.

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GWAS Catalog Trait Associations (1)

Genome-wide significant associations (p < 5×10⁻⁸) from the NHGRI-EBI GWAS Catalog.

thyroxine level

Jacobs BM et al. “Genetic architecture of routinely acquired blood tests in a British South Asian cohort.” Nature Communications 15(1):8929 (2024)
Allele A
OR 0.49
p 2.0e-48
N 38,000
Large GWAS
South Asian
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ClinVar annotation

Pathogenic
1 submitter1 publication

Thyroid hormone metabolism, abnormal, 2

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About DIO1

The protein encoded by this gene belongs to the iodothyronine deiodinase family. It catalyzes the activation, as well as the inactivation of thyroid hormone by outer and inner ring deiodination, respectively. The activation reaction involves the conversion of the prohormone thyroxine (3,5,3',5'-tetraiodothyronine, T4), secreted by the thyroid gland, to the bioactive thyroid hormone (3,5,3'-triiodothyronine, T3) by 5'-deiodination. This protein provides most of the circulating T3, which is essential for growth, differentiation and basal metabolism in vertebrates. This protein is a selenoprotein, containing the rare amino acid selenocysteine (Sec) at its active site. Sec is encoded by the UGA codon, which normally signals translation termination. The 3' UTRs of selenoprotein mRNAs contain a conserved stem-loop structure, designated the Sec insertion sequence (SECIS) element, that is necessary for the recognition of UGA as a Sec codon, rather than as a stop signal. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jun 2018]

View all DIO1 variants →

Gene information from NCBI Gene. Variant classifications from ClinVar.

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