rs2236405
A SNP in the PTCH1 gene on chromosome 9. Its most notable genotype is T;T: common in clinvar
- Gene
- PTCH1
- Location
- Chr 995,449,290 (GRCh38)
- Highest magnitude
- 0.0Typical
- Tested on
- 23andMe, AncestryDNA
- Minor allele frequency
- 8%
Genotypes
As shown in 23andMe and AncestryDNA files.
On SNPedia: (T;T). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.
Frequency
Share of each genotype in 4 HapMap populations.
- AverageT;T 80%
- European ancestry (Utah)T;T 100%
- Han Chinese (Beijing)T;T 75%
- Japanese (Tokyo)T;T 74%
- Yoruba (Nigeria)T;T 69%
Related
Other PTCH1 SNPs
- rs199476090A;GBasal cell nevus syndromeVery important
- rs766313615A;GBasal cell nevus syndromeVery important
- rs778260156G;TBasal cell nevus syndromeVery important
- rs786204056A;GBasal cell nevus syndromeVery important
- rs863224442C;TBasal cell nevus syndromeVery important
- rs863224443C;TBasal cell nevus syndromeVery important
- rs863224444C;TBasal cell nevus syndromeVery important
- rs863224484-;CPossible miscall in 23andMe and Ancestry data; otherwise, Basal cell nevus syndromeVery important
Source and license
Adapted from rs2236405 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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.