Genetic variant
rs916977 a variant in the HERC2 gene
rs916977 is a single-letter difference in the HERC2 gene, on chromosome 15. It has been reported in connection with Skin/hair/eye pigmentation 1 and Blue/nonblue eyes. 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 rs916977 is the catalogue number of one of them, in the HERC2 gene. Which letters you carry there — one copy from each parent — is your genotype.
HERC2 (HECT and RLD domain containing E3 ubiquitin protein ligase 2): This gene belongs to the HERC gene family that encodes a group of unusually large proteins, which contain multiple structural domains. All members have at least 1 copy of an N-terminal region showing homology to the cell cycle regulator RCC1 and a C-terminal HECT (homologous to E6-AP C terminus) domain found in a number of E3 ubiquitin protein ligases.
Gene description from NCBI Gene
rs916977 is part of a haplotype spanning 166kB on chromosome 15, defined by 13 SNPs listed below, fo...
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.
Conditions it has been reported with
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?
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 rs916977, 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
- rs916977
- Gene
- HERC2
- Position (GRCh38)
- chr15:28268217
- Variant type
- snv
- Consequence
- intron variant
- ClinVar classification
- Affects
Genome-wide association studies (3)
| Trait | Risk allele | OR / beta | P-value | Study |
|---|---|---|---|---|
| Blond vs. brown/black hair color | T | OR 1 | 1E-72 | PubMed |
| Iris color | — | — | 1E-43 | PubMed |
| Brown vs. black hair color | T | OR 0.31 | 9E-9 | PubMed |
How common the less frequent letter is
- 1kG AFR
- 89.9%
- 1kG ALL
- 38.9%
- 1kG AMR
- 57.8%
- 1kG EAS
- 27.2%
- 1kG EUR
- 76.6%
- 1kG SAS
- 62.5%
Sources
- dbSNP: rs916977 — the reference record
- ClinVar — clinical interpretations submitted by laboratories
- SNPedia — community-written summaries
- NCBI Gene: HERC2
- Ensembl: HERC2
- GWAS Catalog — association studies