Genetic variant
rs11556505
rs11556505 is a single-letter difference in human DNA, on chromosome 19. Carrying it does not, on its own, mean you have or will develop any condition.
What is this?
Your DNA is a long sequence of four letters. At a few million positions, people commonly differ by a single letter; each of those positions is called a SNP (“snip”), and rs11556505 is the catalogue number of one of them. Which letters you carry there — one copy from each parent — is your genotype.
Association of TOMM40 polymorphisms with late-onset Alzheimer's disease in a Northern Han Chinese population
From SNPedia
Why might it matter?
ClinVar holds no clinical classification for this variant. That is the usual case: most catalogued variants have no known effect on health.
Do I have this variant?
If you have taken a consumer DNA test (23andMe, AncestryDNA and similar), you can download its raw data file and check. Create a free account, upload the file, and this page will show the letters you carry at rs11556505, if your test read this position.
Connect this with your blood results
A gene is a fixed instruction; a blood test shows what your body is doing now. CheckMyBloods reads the two side by side, so a variant can be set against the markers it could plausibly affect.
Blood markers do not diagnose a genetic condition, and a variant does not explain a blood result on its own. Together, with symptoms and family history, they give a clinician context.
What should I do next?
- Find out whether you carry it. Reading about a variant says nothing about you until you know your genotype.
- Put it in context. Add your blood results, so the variant can be read against what your body is doing.
- Ask questions. Dr. Hemsworth, our AI assistant, can explain this variant and your results in plain English.
- Take anything that worries you to a professional. A GP or genetic counsellor can order a confirmatory test and interpret it with your history.
This page is general information drawn from public research databases. It cannot diagnose anything, and it is not a substitute for advice from a doctor or genetic counsellor who knows your history.
Technical details
- dbSNP ID
- rs11556505
- Position
- chr19:44892887
Genome-wide association studies (20)
| Trait | Risk allele | OR / beta | P-value | Study |
|---|---|---|---|---|
| Alzheimer's disease (MTAG) | T | β 0.073 | 1E-245 | PubMed |
| Alzheimer's disease or family history of Alzheimer's disease | T | — | 3E-215 | PubMed |
| Alzheimer's disease | T | — | 2E-133 | PubMed |
| Memory decline | — | β 0.016 | 5E-22 | PubMed |
| Memory decline | — | β 0.015 | 4E-20 | PubMed |
| Memory decline | — | β 0.015 | 1E-15 | PubMed |
| Cerebral amyloid deposition (PET imaging) | T | OR 0.13 | 2E-15 | PubMed |
| Memory decline | — | β 0.015 | 5E-15 | PubMed |
| Baseline memory | — | OR 0.11 | 1E-14 | PubMed |
| Memory decline in normal cognition | — | β 0.013 | 5E-14 | PubMed |
| Memory decline in normal cognition | — | β 0.012 | 1E-12 | PubMed |
| Baseline memory | — | β 0.098 | 3E-12 | PubMed |
| Metabolic syndrome | C | OR 0.13 | 5E-12 | PubMed |
| Baseline memory in impaired cognition | — | OR 0.26 | 1E-11 | PubMed |
| Memory decline in impaired cognition | — | β 0.035 | 7E-9 | PubMed |
| Memory decline in normal cognition | — | β 0.011 | 2E-8 | PubMed |
| Insomnia | T | β 0.007 | 2E-8 | PubMed |
| Memory decline in normal cognition | — | β 0.011 | 4E-8 | PubMed |
| Baseline memory | — | β 0.089 | 1E-6 | PubMed |
| Baseline memory | — | β 0.082 | 5E-6 | PubMed |
Sources
- dbSNP: rs11556505 — the reference record
- ClinVar — clinical interpretations submitted by laboratories
- SNPedia — community-written summaries
- GWAS Catalog — association studies