rs405509 APOE
Homozygous risk allele (T). Associated with: Alzheimer's disease; Cholesteryl ester_20:3_[M+NH4]1+ levels; Cigarettes smoked per day MTAG
What is rs405509?
rs405509 is a single-nucleotide polymorphism (SNP) in the APOE gene (Apolipoprotein E). Each person carries two copies, one from each parent, so a result is reported as a pair of letters such as TT. The table below describes what studies associate with each genotype; the association is statistical, across populations, and is not a diagnosis.
What does each rs405509 genotype mean?
| Genotype | Association | What the evidence says | Confidence |
|---|---|---|---|
| TT | elevated | Homozygous risk allele (T). Associated with: Alzheimer's disease; Cholesteryl ester_20:3_[M+NH4]1+ levels; Cigarettes smoked per day MTAG | 65% |
Which drugs have annotations for rs405509?
PharmGKB clinical annotations (level 1A is the strongest evidence, 4 the weakest):
| Drug | Annotation type | Evidence level |
|---|---|---|
| Selective serotonin reuptake inhibitors | Efficacy | 3 |
Is rs405509 on 23andMe and AncestryDNA chips?
Chip coverage is not recorded for this variant. Orviva reports it when a raw-data file contains it directly or via a well-correlated proxy SNP, and says so when it does not.
Sources
- PharmGKB:3
- Drug:Selective serotonin reuptake inhibitors
- Type:Efficacy
Upload your 23andMe, AncestryDNA or WeGene raw file → · Ask G2: “What is my genotype at rs405509 and what does it mean for me?”
Genetic associations describe risk across populations, not a diagnosis for any one person. Most variants shift risk modestly and act alongside lifestyle, environment and other genes. Consumer DNA chips do not read every position and can be wrong at any single one. For general education only; talk to a clinician or genetic counsellor before acting on anything here, and never change a prescribed medicine without your prescriber.