19-3595925-G-T

Variant names:

• chr19-3595925-G-T
• rs1131882
• ENST00000589966.1:c.406C>A
• TBXA2R p.Arg136Ser

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The ENST00000589966.1(TBXA2R):​c.406C>A​(p.Arg136Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 10/13 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R136C) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TBXA2R ENST00000589966.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.249
• Publications: 64 publications found

Genes affected

TBXA2R (HGNC:11608): (thromboxane A2 receptor) This gene encodes a member of the G protein-coupled receptor family. The protein interacts with thromboxane A2 to induce platelet aggregation and regulate hemostasis. A mutation in this gene results in a bleeding disorder. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2009]

TBXA2R Gene-Disease associations (from GenCC):

• bleeding disorder, platelet-type, 13, susceptibility to

  Inheritance: AD Classification: MODERATE Submitted by: PanelApp Australia
• qualitative platelet defect

  Inheritance: AD Classification: MODERATE Submitted by: ClinGen
• bleeding diathesis due to thromboxane synthesis deficiency

  Inheritance: Unknown, AD Classification: MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• schizophrenia

  Inheritance: Unknown Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.33366254).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000589966.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TBXA2R	NM_001060.6	MANE Select	c.795C>A	p.Ile265Ile	synonymous	Exon 3 of 3	NP_001051.1	P21731-3
	TBXA2R	NM_201636.3		c.795C>A	p.Ile265Ile	synonymous	Exon 3 of 4	NP_963998.2	P21731-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TBXA2R	ENST00000589966.1	TSL:1	c.406C>A	p.Arg136Ser	missense	Exon 2 of 2	ENSP00000468145.1	K7ER80
	TBXA2R	ENST00000375190.10	TSL:1 MANE Select	c.795C>A	p.Ile265Ile	synonymous	Exon 3 of 3	ENSP00000364336.4	P21731-3
	TBXA2R	ENST00000411851.3	TSL:2	c.795C>A	p.Ile265Ile	synonymous	Exon 3 of 4	ENSP00000393333.2	P21731-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1438316 Hom.: 0 Cov.: 41 AF XY: 0.00 AC XY: 0 AN XY: 713382

African (AFR) AF: 0.00 AC: 0 AN: 33172

American (AMR) AF: 0.00 AC: 0 AN: 40940

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25582

East Asian (EAS) AF: 0.00 AC: 0 AN: 38510

South Asian (SAS) AF: 0.00 AC: 0 AN: 82994

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50398

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5342

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1101972

Other (OTH) AF: 0.00 AC: 0 AN: 59406

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 5329

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	-0.095	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	4.8
DANN	Benign	0.80
FATHMM_MKL	Benign	0.55	D
LIST_S2	Benign	0.28	T
M_CAP	Benign	0.045	D
MetaRNN	Benign	0.33	T
PhyloP100		0.25
Sift4G	Uncertain	0.048	D
Mutation Taster		=54/46	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.090		Details are displayed if max score is > 0.2

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs1131882;

hg19: chr19-3595923;

COSMIC: COSV59260327;

COSMIC: COSV59260327;