rs397509199
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 1743,071,077 (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
- D;DNot ratedIf from Ancestry DNA, likely to be a miscall
- D;INot ratedIf from Ancestry DNA, likely to be a miscall
SNPedia records rs397509199 on the minus strand: (-;A), (A;A), (D;D), (D;I). 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
rs397509199, also known as c.4837delA and p.Ser1613Valfs, is considered a pathogenic BRCA1 gene mutation by multiple sources in ClinVar.
-;T
See details at rs397509199.
D;D
Users with raw data from Ancestry.com have an overly high rate of miscalls for this BRCA1 genotype. If your data is not from Ancestry.com, please contact us.
D;I
Users with raw data from Ancestry.com have an overly high rate of miscalls for this BRCA1 genotype. If your data is not from Ancestry.com, please contact us.
Source and license
Adapted from rs397509199 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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.