rs16948305

This is a downstream gene variant variant in the TYMS gene.

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GWAS Catalog Trait Associations (2)

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

erythrocyte volume

Chen MH et al. “Trans-ethnic and Ancestry-Specific Blood-Cell Genetics in 746,667 Individuals from 5 Global Populations.” Cell 182(5):1198-1213.e14 (2020)
Allele T
OR —
p 6.0e-14
N 696,882
Large GWAS
multi-ancestry
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Research that mentions this SNP (2)

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Association of the STAT4 gene with increased susceptibility for some immune‐mediated diseases
AssociationN=318Martínez A. et al.(2008)· Arthritis &amp; Rheumatism

This pharmacogenetic study examined genetic variants in the folate metabolism and MTX transport pathways in rheumatoid arthritis patients receiving methotrexate monotherapy. Study 1 (n=124) identified rs17421511 and rs1476413 in MTHFR and rs1643650 in DHFR as significantly associated with MTX treatment response (p=0.024, p=0.0086, p=0.026 respectively), and rs16853826 and rs10197559 in ATIC as associated with toxicity (p=0.039). Study 2 (n=194) found rs10106 and rs10987742 in FPGS associated with response, and rs868755, rs10280623, rs1858923 in ABCB1 associated with toxicity, with rs10106 also associated with longer MTX monotherapy survival.

Traits studied:MTX monotherapy survivalMethotrexate responseMethotrexate toxicityRheumatoid arthritis
PubMedDOIMetascience Observatory
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Replication of the tumor necrosis factor receptor−associated factor 1/complement component 5 region as a susceptibility locus for rheumatoid arthritis in a European family‐based study
AssociationN=318Kurreeman FA et al.(2008)· Arthritis &amp; Rheumatism

This pharmacogenetics study analyzed 28 SNPs in methotrexate (MTX) metabolism genes (SLC19A1/RFC1, ABCB1, FPGS, GGH) in two Spanish populations with rheumatoid arthritis (n=124 and n=194). Key findings: FPGS rs10987742 and rs10106 associated with MTX response (p=0.033, p=0.041); FPGS rs10106 also associated with MTX survival (p=0.005) and toxicity (p=0.021); ABCB1 rs868755, rs10280623, rs1858923 associated with toxicity (p=0.025, p=0.048, p=0.031). In the first study, MTHFR rs17421511 (p=0.024) and rs1476413 (p=0.0086) associated with response, DHFR rs1643650 (p=0.026) associated with response, ATIC rs16853826 associated with toxicity (p=0.039).

Traits studied:Methotrexate responseMethotrexate survivalMethotrexate toxicityRheumatoid arthritis
PubMedDOIMetascience Observatory

About TYMS

Thymidylate synthase catalyzes the methylation of deoxyuridylate to deoxythymidylate using, 10-methylenetetrahydrofolate (methylene-THF) as a cofactor. This function maintains the dTMP (thymidine-5-prime monophosphate) pool critical for DNA replication and repair. The enzyme has been of interest as a target for cancer chemotherapeutic agents. It is considered to be the primary site of action for 5-fluorouracil, 5-fluoro-2-prime-deoxyuridine, and some folate analogs. Expression of this gene and that of a naturally occurring antisense transcript, mitochondrial enolase superfamily member 1 (GeneID:55556), vary inversely when cell-growth progresses from late-log to plateau phase. Polymorphisms in this gene may be associated with etiology of neoplasia, including breast cancer, and response to chemotherapy. [provided by RefSeq, Aug 2017]

View all TYMS variants →

Gene information from NCBI Gene. Variant classifications from ClinVar.

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