3-129061770-TG-T

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1PM2PP5_Moderate

The NM_000174.5(GP9):​c.34delG​(p.Ala12ProfsTer71) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★).

Frequency

Genomes: not found (cov: 33)

Consequence

GP9
NM_000174.5 frameshift

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 1.86
Variant links:
Genes affected
GP9 (HGNC:4444): (glycoprotein IX platelet) This gene encodes a small membrane glycoprotein found on the surface of human platelets. It forms a 1-to-1 noncovalent complex with glycoprotein Ib, a platelet surface membrane glycoprotein complex that functions as a receptor for von Willebrand factor. The complete receptor complex includes noncovalent association of the alpha and beta subunits with the protein encoded by this gene and platelet glycoprotein V. Defects in this gene are a cause of Bernard-Soulier syndrome, also known as giant platelet disease. These patients have unusually large platelets and have a clinical bleeding tendency. [provided by RefSeq, Oct 2008]

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PVS1
Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 28 pathogenic variants in the truncated region.
PM2
Very rare variant in population databases, with high coverage;
PP5
Variant 3-129061770-TG-T is Pathogenic according to our data. Variant chr3-129061770-TG-T is described in ClinVar as [Pathogenic]. Clinvar id is 3644914.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
GP9NM_000174.5 linkc.34delG p.Ala12ProfsTer71 frameshift_variant Exon 3 of 3 ENST00000307395.5 NP_000165.1 P14770
GP9XM_047447997.1 linkc.34delG p.Ala12ProfsTer71 frameshift_variant Exon 2 of 2 XP_047303953.1

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
GP9ENST00000307395.5 linkc.34delG p.Ala12ProfsTer71 frameshift_variant Exon 3 of 3 1 NM_000174.5 ENSP00000303942.4 P14770

Frequencies

GnomAD3 genomes
Cov.:
33
GnomAD4 exome
Cov.:
32
GnomAD4 genome
Cov.:
33

ClinVar

Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

not provided Pathogenic:1
Mar 07, 2024
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Ala12Profs*71) in the GP9 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 166 amino acid(s) of the GP9 protein. This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with GP9-related conditions. This variant disrupts a region of the GP9 protein in which other variant(s) (p.Phe71Ser) have been determined to be pathogenic (PMID: 9163595, 21699652, 25539746, 28395735, 29636940). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-128780613; API