Genetic variant
rs4820268
rs4820268 is a single-letter difference in human DNA, on chromosome 22. 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 rs4820268 is the catalogue number of one of them. Which letters you carry there — one copy from each parent — is your genotype.
We hold only the basic reference record for this variant: its ID and position. Many catalogued variants have never been linked to anything.
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 rs4820268, 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
- rs4820268
- Position
- chr22:37073551
Genome-wide association studies (20)
| Trait | Risk allele | OR / beta | P-value | Study |
|---|---|---|---|---|
| Hemoglobin concentration | G | β 0.086 | 1E-151 | PubMed |
| Hemoglobin concentration | G | β 0.085 | 2E-114 | PubMed |
| AHSP/BLVRB protein level ratio | — | OR 0.12 | 3E-73 | PubMed |
| Glycated hemoglobin levels | G | β 0.016 | 1E-22 | PubMed |
| Cholesterol to Total Lipids in Small HDL percentage | A | β 0.02 | 1E-22 | PubMed |
| Cholesteryl Esters to Total Lipids in Small HDL percentage | A | β 0.02 | 7E-19 | PubMed |
| Free Cholesterol to Total Lipids in Small LDL percentage | A | β 0.02 | 5E-17 | PubMed |
| Triglycerides in medium HDL | A | β 0.02 | 8E-16 | PubMed |
| Mean corpuscular hemoglobin concentration | — | β 0.094 | 2E-14 | PubMed |
| Triglycerides in HDL | A | β 0.01 | 1E-13 | PubMed |
| Cholesteryl Esters to Total Lipids in Large HDL percentage | A | β 0.01 | 1E-13 | PubMed |
| Red blood cell traits | G | β 0.09 | 1E-12 | PubMed |
| Mean corpuscular volume | A | OR 0.13 | 4E-12 | PubMed |
| Triglycerides in large HDL | A | β 0.01 | 7E-12 | PubMed |
| Iron status biomarkers | G | OR 4.24 | 4E-11 | PubMed |
| Cholesteryl Esters to Total Lipids in Medium HDL percentage | A | β 0.01 | 1E-10 | PubMed |
| White blood cell count | A | β 0.008 | 3E-10 | PubMed |
| Mean corpuscular hemoglobin | A | OR 0.15 | 3E-10 | PubMed |
| Thioproline levels | A | β 0.095 | 6E-10 | PubMed |
| Liver fibrosis and steatohepatitis severity (MRI cT1 measure) | G | β 0.066 | 2E-9 | PubMed |
Sources
- dbSNP: rs4820268 — the reference record
- ClinVar — clinical interpretations submitted by laboratories
- SNPedia — community-written summaries
- GWAS Catalog — association studies