18-62045901-C-A

Position:

chr18-62045901-C-A

Variant summary

Our verdict is Benign. Variant got -15 ACMG points: 0P and 15B. BP4_ModerateBP6_Very_StrongBP7BS1

The ENST00000640252.2(PIGN):c.2751G>T(p.Thr917=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000516 in 1,613,784 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. T917T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0017 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00039 ( 1 hom. )

Consequence

PIGN
ENST00000640252.2 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: 0.0130

Variant links:

Genes affected

PIGN (HGNC:8967): (phosphatidylinositol glycan anchor biosynthesis class N) This gene encodes a protein that is involved in glycosylphosphatidylinositol (GPI)-anchor biosynthesis. The GPI-anchor is a glycolipid found on many blood cells and serves to anchor proteins to the cell surface. This protein is expressed in the endoplasmic reticulum and transfers phosphoethanolamine (EtNP) to the first mannose of the GPI anchor. Two alternatively spliced variants, which encode an identical isoform, have been reported. [provided by RefSeq, Jul 2008]

PIGN links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -15 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.26).

BP6

Variant 18-62045901-C-A is Benign according to our data. Variant chr18-62045901-C-A is described in ClinVar as [Likely_benign]. Clinvar id is 472228.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.013 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00168 (256/152248) while in subpopulation AFR AF= 0.00539 (224/41538). AF 95% confidence interval is 0.00481. There are 1 homozygotes in gnomad4. There are 113 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PIGN	NM_176787.5 linkuse as main transcript	c.2751G>T	p.Thr917=	synonymous_variant	31/31	ENST00000640252.2	NP_789744.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PIGN	ENST00000640252.2 linkuse as main transcript	c.2751G>T	p.Thr917=	synonymous_variant	31/31	1	NM_176787.5	ENSP00000492233	P1

Frequencies

GnomAD3 genomes

AF:

0.00168

AC:

255

AN:

152130

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00541

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00124

Gnomad ASJ

AF:

0.00202

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00144

GnomAD3 exomes

AF:

0.00108

AC:

268

AN:

249030

Hom.:

AF XY:

0.000785

AC XY:

106

AN XY:

135108

show subpopulations

Gnomad AFR exome

AF:

0.00640

Gnomad AMR exome

AF:

0.00290

Gnomad ASJ exome

AF:

0.00358

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000974

Gnomad OTH exome

AF:

0.00364

GnomAD4 exome

AF:

0.000394

AC:

576

AN:

1461536

Hom.:

Cov.:

AF XY:

0.000373

AC XY:

271

AN XY:

727040

show subpopulations

Gnomad4 AFR exome

AF:

0.00690

Gnomad4 AMR exome

AF:

0.00273

Gnomad4 ASJ exome

AF:

0.00406

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000441

Gnomad4 OTH exome

AF:

0.00106

GnomAD4 genome

AF:

0.00168

AC:

256

AN:

152248

Hom.:

Cov.:

AF XY:

0.00152

AC XY:

113

AN XY:

74442

show subpopulations

Gnomad4 AFR

AF:

0.00539

Gnomad4 AMR

AF:

0.00124

Gnomad4 ASJ

AF:

0.00202

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.00108

Hom.:

Bravo

AF:

0.00236

EpiCase

AF:

0.000164

EpiControl

AF:

0.000297

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Likely benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Dec 06, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Dec 09, 2020	- -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Mar 01, 2023	PIGN: BP4, BP7 -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 08, 2017

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Multiple congenital anomalies-hypotonia-seizures syndrome 1

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

PIGN-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 11, 2019

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.26

CADD

Benign

1.8

DANN

Benign

0.65

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over