rs1800440
A SNP in the CYP1B1 gene on chromosome 2. Its most notable genotype is T;T: common on affy axiom data
- Gene
- CYP1B1
- Location
- Chr 238,070,996 (GRCh38)
- Highest magnitude
- 0.0Typical
- Tested on
- 23andMe, AncestryDNA, FamilyTreeDNA
- Minor allele frequency
- 10%
Genotypes
Plus strand, as in 23andMe and AncestryDNA files.
SNPedia records rs1800440 on the minus strand: (A;A). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.
Frequency
Share of each genotype in 10 HapMap populations.
- AverageT;T 86%
- European ancestry (Utah)T;T 66%
- Han Chinese (Beijing)T;T 99%
- Japanese (Tokyo)T;T 99%
- Yoruba (Nigeria)T;T 100%
- African ancestry (Southwest US)T;T 95%
- Chinese (Denver)T;T 99%
- Gujarati IndianT;T 59%
- Mexican ancestry (Los Angeles)T;T 81%
- Maasai (Kenya)T;T 99%
- TuscanT;T 60%
Related
Other CYP1B1 SNPs
- rs28936700C;TCarrier of a primary congenital glaucoma mutationImportant
- rs28936701A;GCarrier of a primary congenital glaucoma mutationImportant
- rs1056836C;C0.3x decreased risk for prostate cancerWorth knowing
- rs9282671T;Tsmall chance of slightly increasing risk for a form of glaucomaMinor
- rs1056827C;Ccommon in clinvarTypical
- rs1056837A;Acommon in clinvarTypical
Source and license
Adapted from rs1800440 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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.