chr20-49566593-T-C

Position:

• chr20-49566593-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000961.4(PTGIS):​c.74+1450A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.454 in 152,076 control chromosomes in the GnomAD database, including 16,220 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.45 (16220 hom., cov: 33)
• Consequence: PTGIS NM_000961.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0160

Genes affected

PTGIS (HGNC:9603): (prostaglandin I2 synthase) This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. However, this protein is considered a member of the cytochrome P450 superfamily on the basis of sequence similarity rather than functional similarity. This endoplasmic reticulum membrane protein catalyzes the conversion of prostglandin H2 to prostacyclin (prostaglandin I2), a potent vasodilator and inhibitor of platelet aggregation. An imbalance of prostacyclin and its physiological antagonist thromboxane A2 contribute to the development of myocardial infarction, stroke, and atherosclerosis. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.605 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PTGIS	NM_000961.4	c.74+1450A>G		intron_variant		ENST00000244043.5	NP_000952.1
PTGIS	XM_047440325.1	c.74+1450A>G		intron_variant			XP_047296281.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PTGIS	ENST00000244043.5	c.74+1450A>G		intron_variant		1	NM_000961.4	ENSP00000244043	P1
PTGIS	ENST00000478971.1	n.74+1450A>G		intron_variant, non_coding_transcript_variant		1

Frequencies

GnomAD3 genomes AF: 0.455 AC: 69093 AN: 151958 Hom.: 16220 Cov.: 33

Gnomad AFR AF: 0.345

Gnomad AMI AF: 0.398

Gnomad AMR AF: 0.461

Gnomad ASJ AF: 0.370

Gnomad EAS AF: 0.623

Gnomad SAS AF: 0.495

Gnomad FIN AF: 0.500

Gnomad MID AF: 0.364

Gnomad NFE AF: 0.503

Gnomad OTH AF: 0.449

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.454 AC: 69104 AN: 152076 Hom.: 16220 Cov.: 33 AF XY: 0.456 AC XY: 33909 AN XY: 74334

Gnomad4 AFR AF: 0.345

Gnomad4 AMR AF: 0.462

Gnomad4 ASJ AF: 0.370

Gnomad4 EAS AF: 0.623

Gnomad4 SAS AF: 0.495

Gnomad4 FIN AF: 0.500

Gnomad4 NFE AF: 0.503

Gnomad4 OTH AF: 0.448

Alfa AF: 0.486 Hom.: 3713

Bravo AF: 0.448

Asia WGS AF: 0.540 AC: 1881 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	4.8
DANN	Benign	0.52

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

LitVar

Other links and lift over

dbSNP: rs493694; hg19: chr20-48183130;