Links to SNPedia
Note: For some SNPs, testing providers detect the genotype from the opposite strand of DNA, so that the genotypes listed on openSNP don't appear here. In those cases, please replace "A" by "T" or "G" by "C" (and vice-versa).
Publications on this SNP on the Public Library of Science:
Publications on this SNP on Mendeley
Evidence compiled by the Personal Genome Project
||Low clinical importance, Likely pathogenic
||This common variant (HapMap allele frequency of 31.3%) in a protein involved in folate (B9) and cobalamin (B12) metabolism and is often reported as "MTRR I22M" (an alternative transcript position). Mothers homozygous for this variant are associated with having around a increased chance of a child with Down syndrome (risk of 0.4%, average risk in population is 0.25%). Notably, age plays a far larger role in the rate of Down syndrome (risk is 4.5% for a mother 45-years-of-age), and it is unknown how this variant may combine with the effect of age. There are conflicting reports associating this variant with incidence of neural tube defects, possibly when combined with MTHFR A222V.
Publications listed by Genome.gov
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Users who share this SNP: