rs104894434
A SNP in the GCH1 gene on chromosome 14. Its most notable genotype is G;G: dystonia due to autosomal recessive GCH1 mutation
- Gene
- GCH1
- Location
- Chr 1454,844,108 (GRCh38)
- Highest magnitude
- 4.0Very important
- Tested on
- AncestryDNA
Genotypes
Plus strand, as in 23andMe and AncestryDNA files.
- G;GMost notableBaddystonia due to autosomal recessive GCH1 mutation
- A;GBadCarrier of a dopa-responsive dystonia mutation
- A;AGoodcommon in clinvar
SNPedia records rs104894434 on the minus strand: (C;C), (C;T), (T;T). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.
Related
Other GCH1 SNPs
- rs886039379-;ATDystonia, dopa-responsiveVery important
- rs41298442C;CDystonia (dopa-responsive) from homozygous GCH1 mutationVery important
- rs104894433A;Gdystonia due on GCH1 loss-of-function mutationVery important
- rs104894436A;CGCH1-deficient dopa-responsive dystonia (likely)Very important
- rs104894437A;Tdystonia due on GCH1 loss-of-function mutationVery important
- rs104894438C;Tdystonia due on GCH1 loss-of-function mutationVery important
- rs104894439C;Gdystonia due on GCH1 loss-of-function mutationVery important
- rs104894440G;Tdystonia due on GCH1 loss-of-function mutationVery important
Notes
From SNPedia
Notes
c.662T>C (p.Met221Thr) 23andMe name: i5000652
G;G
The degree of dystonia may vary. See the SNPedia GCH1 page for discussion.
A;G
Likely to be unaffected in absence of another GCH1 gene mutation; see GCH1 webpage.
Source and license
Adapted from rs104894434 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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.