rs273902791
A SNP in the BRCA1 gene on chromosome 17. Its most notable genotype is -;T: BRCA1 variant considered pathogenic for breast cancer
- Gene
- BRCA1
- Location
- Chr 1743,115,781 (GRCh38)
- Highest magnitude
- 6.0Very important
- Tested on
- AncestryDNA
Genotypes
Plus strand, as in 23andMe and AncestryDNA files.
- -;TMost notableBadBRCA1 variant considered pathogenic for breast cancer
- T;TGoodcommon in clinvar
SNPedia records rs273902791 on the minus strand: (-;A), (A;A). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.
Related
Other BRCA1 SNPs
- rs28897696T;Tcarrier of two copies of BRCA1 variant; likely to be at high risk for breast/ovarian cancerVery important
- rs41286296A;CBRCA1 pathogenic mutation associated with breast cancerVery important
- rs62625306A;CBRCA1 pathogenic mutation associated with breast cancerVery important
- rs62625307A;GBRCA1 pathogenic mutation associated with breast cancerVery important
- i6051899A;Clikely to be BRCA1 variant pathogenic for breast cancerVery important
- rs1800747C;TBRCA1 pathogenic mutation associated with breast cancerVery important
- rs28897672A;Tconsidered a pathogenic BRCA1 breast cancer variantVery important
- rs28897686A;CBRCA1 pathogenic mutation associated with breast cancerVery important
Notes
From SNPedia
Notes
BRCA1, c.81-2delA
-;T
We're aware of at least one case where 23andMe included this in raw data, but clinical verification via color.com confirmed that the mutation wasn't actually present. https://www.reddit.com/r/SNPedia/comments/7nstx3/rs273902791_a_brca1_ancestry_miscall/ . more validated self reports are invited via info@promethease.com
Source and license
Adapted from rs273902791 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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.