rs6065

This is a variant in the GP1BA gene that changes a threonine to an methionine.

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GWAS Catalog Trait Associations (4)

Genome-wide significant associations (p < 5×10⁻⁸) from the NHGRI-EBI GWAS Catalog.

platelet volume

Loya H et al. “A scalable variational inference approach for increased mixed-model association power.” Nature Genetics 57(2):461-468 (2025)
Allele T
OR 0.05
p 8.0e-54
N 394,642
Large GWAS
European
Chen MH et al. “Trans-ethnic and Ancestry-Specific Blood-Cell Genetics in 746,667 Individuals from 5 Global Populations.” Cell 182(5):1198-1213.e14 (2020)
Allele T
OR 0.05
p 4.0e-39
N 460,935
Large GWAS
European
Vuckovic D et al. “The Polygenic and Monogenic Basis of Blood Traits and Diseases.” Cell 182(5):1214-1231.e11 (2020)
Allele T
OR 0.05
p 9.0e-30
N 408,112
Large GWAS
European
Yang Z et al. “Genetic basis of pregnancy-associated decreased platelet counts and gestational thrombocytopenia.” Blood 143(15):1528-1538 (2024)
Allele T
OR 0.09
p 3.0e-8
N 71,605
Large GWAS
East Asian

platelet glycoprotein Ib alpha chain level

Loya H et al. “A scalable variational inference approach for increased mixed-model association power.” Nature Genetics 57(2):461-468 (2025)
Allele T
OR 0.12
p 3.0e-29
N 47,745
Large GWAS
European

Thrombocytopenia

Yang Z et al. “Genetic basis of pregnancy-associated decreased platelet counts and gestational thrombocytopenia.” Blood 143(15):1528-1538 (2024)
Allele T
OR 0.71
p 2.0e-12
N 96,432
Large GWAS
East Asian

platelet count

Jee YH et al. “Genome-wide association studies in a large Korean cohort identify quantitative trait loci for 36 traits and illuminate their genetic architectures.” Nature Communications 16(1):4935 (2025)
Allele T
OR 0.16
p 1.0e-141
N 153,950
Large GWAS
East Asian
Gieger C et al. “New gene functions in megakaryopoiesis and platelet formation.” Nature 480(7376):201-8 (2011)
Allele T
OR 4.19
p 3.0e-11
N 48,666
Large GWAS
European
Jacobs BM et al. “Genetic architecture of routinely acquired blood tests in a British South Asian cohort.” Nature Communications 15(1):8929 (2024)
Allele T
OR 0.09
p 2.0e-10
N 38,000
Large GWAS
South Asian
Yang Z et al. “Genetic basis of pregnancy-associated decreased platelet counts and gestational thrombocytopenia.” Blood 143(15):1528-1538 (2024)
Allele T
OR 0.14
p 4.0e-9
N 33,553
Large GWAS
East Asian
Kamatani Y et al. “Genome-wide association study of hematological and biochemical traits in a Japanese population.” Nature Genetics 42(3):210-5 (2010)
Allele T
OR 0.12
p 2.0e-12
N 14,806
Large GWAS
East Asian
Choe EK et al. “Leveraging deep phenotyping from health check-up cohort with 10,000 Korean individuals for phenome-wide association study of 136 traits.” Scientific Reports 12(1):1930 (2022)
Allele T
OR 9.72
p 2.0e-14
N 9,689
Large GWAS
East Asian
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ClinVar annotation

Benign★★★★
5 submitters2 publications

Bernard Soulier syndrome (BSS); not specified

View on ClinVar →
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Research that mentions this SNP (1)

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A genome- and phenome-wide association study to identify genetic variants influencing platelet count and volume and their pleiotropic effects
AssociationN=13,582Khader Shameer et al.(2014)· Human Genetics

A genome-wide association study (GWAS) of platelet count (PLT) and mean platelet volume (MPV) in 13,582 and 6,291 participants respectively from the eMERGE network identified 5 chromosomal regions associated with PLT and 8 with MPV at genome-wide significance (P<5E-8). Key findings include variants in ARHGEF3 (rs1354034, P=6E-24 for PLT; P=9E-34 for MPV), SH2B3 (rs3184504, P=5E-12), and multiple other loci. The study replicated 20 SNPs for PLT and 22 for MPV from prior meta-analyses and demonstrated pleiotropic effects with myocardial infarction, autoimmune, and hematologic disorders through phenome-wide association study (PheWAS).

Traits studied:Autoimmune disordersBlood pressureEosinophil countHematologic disordersMean platelet volume (MPV)Myocardial infarctionPlatelet count (PLT)Type 1 diabetes
PubMedDOIMetascience Observatory

About GP1BA

Glycoprotein Ib (GP Ib) is a platelet surface membrane glycoprotein composed of a heterodimer, an alpha chain and a beta chain, that is linked by disulfide bonds. The Gp Ib functions as a receptor for von Willebrand factor (VWF). The complete receptor complex includes noncovalent association of the alpha and beta subunits with platelet glycoprotein IX and platelet glycoprotein V. The binding of the GP Ib-IX-V complex to VWF facilitates initial platelet adhesion to vascular subendothelium after vascular injury, and also initiates signaling events within the platelet that lead to enhanced platelet activation, thrombosis, and hemostasis. This gene encodes the alpha subunit. Mutations in this gene result in Bernard-Soulier syndromes and platelet-type von Willebrand disease. The coding region of this gene is known to contain a polymophic variable number tandem repeat (VNTR) domain that is associated with susceptibility to nonarteritic anterior ischemic optic neuropathy. [provided by RefSeq, Oct 2013]

View all GP1BA variants →

Gene information from NCBI Gene. Variant classifications from ClinVar.

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