rs439401 a variant in the APOE gene

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 rs439401 is the catalogue number of one of them, in the APOE gene. Which letters you carry there — one copy from each parent — is your genotype.

APOE (apolipoprotein E): The protein encoded by this gene is a major apoprotein of the chylomicron. It binds to a specific liver and peripheral cell receptor, and is essential for the normal catabolism of triglyceride-rich lipoprotein constituents. This gene maps to chromosome 19 in a cluster with the related apolipoprotein C1 and C2 genes.

Gene description from NCBI Gene

This appears to be the snp on the Illumina Human 550 which is closest to rs4420638 [GWAS:Triglyceri...

From SNPedia

Why might it matter?

ClinVar records this variant as drug response, meaning linked to how the body handles certain medicines. A classification describes the variant, not you: what it means for one person depends on their genotype, their family history and often on other genes and circumstances.

Conditions it has been reported with

• Warfarin response

Listed in ClinVar submissions for this variant. Being listed is a report of an association, not a statement that the variant causes the condition in any given person.

Do I have this variant?

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 related to APOE

• Total Cholesterol
• Ldl Cholesterol
• Hdl Cholesterol
• triglycérides
• Apolipoprotein B

APOE variants affect lipid metabolism and cardiovascular risk. Monitor cholesterol panel.

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?

1. Find out whether you carry it. Reading about a variant says nothing about you until you know your genotype.
2. Put it in context. Add your blood results, so the variant can be read against what your body is doing.
3. Ask questions. Dr. Hemsworth, our AI assistant, can explain this variant and your results in plain English.
4. 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

rs439401

Gene

APOE

Position (GRCh38)

chr19:44911193

Variant type

snv

Consequence

non coding transcript exon variant

ClinVar classification

drug response

Genome-wide association studies (20)

How common the less frequent letter is

gnomAD ALL

28.2%

1kG AFR

12.2%

1kG ALL

40.5%

1kG AMR

48.4%

1kG EAS

55.6%

1kG EUR

38.1%

1kG SAS

42.1%

Sources

• dbSNP: rs439401 — the reference record
• ClinVar — clinical interpretations submitted by laboratories
• SNPedia — community-written summaries
• NCBI Gene: APOE
• Ensembl: APOE
• GWAS Catalog — association studies

Related

Other variants in APOE

• rs7412
• rs405509
• rs769450
• rs515726148
• rs28931578
• rs121918398
• rs121918399
• rs190853081
• rs563571689
• rs2122137937

• The APOE gene
• SNP explorer
• Gene directory
• Health conditions