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Standard

Mean platelet volume

GP9 · rs5030764

Strength of the evidence

4 / 4

ClinVar classifies it as disease-causing (or likely), reviewed at 3 of 4 stars. Its strongest genetic-study result is p = 10−49, with 6 associations in the GWAS Catalog.

How this is scored

4: ClinVar disease-causing, reviewed by an expert panel or a guideline (3–4 stars). 3: ClinVar, several labs agreeing (2 stars), or a genetic study at p ≤ 10−50. 2: ClinVar from one lab (1 star), or p ≤ 10−20. 1: ClinVar submitted without criteria (0 stars), or genome-wide significance (p ≤ 5×10−8). The higher of the two counts. It says how solid the evidence is, not whether it matters for a particular person.

What the study found

Who was studied 460,935 European ancestry individuals.

The effect Each copy of the A allele shifted the measure 0.738 SD unit lower (95% confidence interval 0.64-0.84); p = 1 × 10−49.

How common The A allele had a frequency of about 100% in the people studied.

Where it sits Chromosome 3, band 3q21.3 — a missense change in GP9.

What ClinVar records

Classification Pathogenic for Bernard-Soulier syndrome type C, Bernard Soulier syndrome, Macrothrombocytopenia, Thrombocytopenia, GP9-related disorder and 2 more; reviewed by expert panel (3 of 4 stars, 23 submitters), last evaluated 2025-02-11. ClinVar record 13529 NM_000174.5(GP9):c.182A>G (p.Asn61Ser)

Change history MyGeneLog™ keeps a copy of every weekly release from 2026-10-19 and compares them. This position's classification has not changed since.

What this is ClinVar's aggregate record for this position (as of its 2026-11-09 release), not a result about you. A classification describes the variant against the condition named, as laboratories submitted it. Whether a person carries this variant, and what that would mean for them, is a question for a clinical test and a genetic counsellor.

How common each version is

AG
World gnomAD
A 99.9% · G 0.1%
World TOPMed
A 99.9% · G 0.1%

By ancestry gnomAD

European (non-Finnish)
A 99.9%
African / African American
A 100.0%
Admixed American (Latino)
A 100.0%
Finnish
A 100.0%

The share of all copies of this position that are each version. Source: the population studies published in dbSNP (US NCBI); each row names its study. The ancestry rows are gnomAD's own groups (via Ensembl), as the survey defines them, not races. No Korean figure for this position yet.

What each result means

A/A Two copies of the version the research linked to Mean platelet volume. That is the strongest link of the three results. A link in a study is not a diagnosis.
A/G One copy of the version the research linked to Mean platelet volume. That is a smaller link than two copies.
G/G No copy of the version the research linked to Mean platelet volume. This is the starting point the study compared everyone against.
Source

Quoting this page

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Mean platelet volume (rs5030764). MyGeneLog™. https://www.mygenelog.com/variants/rs5030764

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