rs12720356

A SNP in the TYK2 gene on chromosome 19. Its most notable genotype is A;A: common on affy axiom data

Gene
TYK2
Location
Chr 1910,359,299 (GRCh38)
Highest magnitude
0.0Typical
Tested on
23andMe, AncestryDNA
Minor allele frequency
5%

Genotypes

Plus strand, as in 23andMe and AncestryDNA files.

  1. A;AMost notableGoodcommon on affy axiom dataTypical · 0.094% of people

SNPedia records rs12720356 on the minus strand: (T;T). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.

Frequency

Share of each genotype in 8 HapMap populations.

  • AverageA;A 94%
  • European ancestry (Utah)A;A 77%
  • Han Chinese (Beijing)A;A 100%
  • Japanese (Tokyo)A;A 100%
  • Yoruba (Nigeria)A;A 100%
  • African ancestry (Southwest US)A;A 93%
  • Gujarati IndianA;A 97%
  • Mexican ancestry (Los Angeles)A;A 95%
  • TuscanA;A 86%

Notes

From SNPedia

Show notes, about 160 words

Polymorphisms in the tyrosine kinase 2 and interferon regulatory factor 5 genes are associated with systemic lupus erythematosus. Somatic mutations and germline sequence variants in the expressed tyrosine kinase genes of patients with de novo acute myeloid leukemia. Diverse genome-wide association studies associate the IL12/IL23 pathway with Crohn Disease. Variants in interferon-alpha pathway genes and response to pegylated interferon-Alpha2a plus ribavirin for treatment of chronic hepatitis C virus infection in the hepatitis C antiviral long-term treatment against cirrhosis trial. Genetic polymorphisms, their allele combinations and IFN-beta treatment response in Irish multiple sclerosis patients. Strong evidence of a combination polymorphism of the tyrosine kinase 2 gene and the signal transducer and activator of transcription 3 gene as a DNA-based biomarker for susceptibility to Crohn's disease in the Japanese population.

Source and license

Adapted from rs12720356 on SNPedia, using a snapshot taken October 16, 2026. SNPedia content is shared under CC BY-NC-SA 3.0 US, and this page is shared under the same license.

SNPedia is a community-edited wiki. Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice. Magnitude is a community rating of how interesting a genotype is, not a risk score.