rs61755362

Positions:

chr18-62161187-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The ENST00000640252.2(PIGN):c.167C>T(p.Ala56Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0122 in 1,613,728 control chromosomes in the GnomAD database, including 212 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A56T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.011 ( 34 hom., cov: 33)

Exomes 𝑓: 0.012 ( 178 hom. )

Consequence

PIGN
ENST00000640252.2 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:9

Conservation

PhyloP100: 9.94

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 -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.011676133).

BP6

Variant 18-62161187-G-A is Benign according to our data. Variant chr18-62161187-G-A is described in ClinVar as [Benign]. Clinvar id is 447939.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr18-62161187-G-A is described in Lovd as [Likely_benign]. Variant chr18-62161187-G-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0106 (1620/152288) while in subpopulation NFE AF= 0.0125 (847/68028). AF 95% confidence interval is 0.0118. There are 34 homozygotes in gnomad4. There are 924 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 34 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PIGN	NM_176787.5 linkuse as main transcript	c.167C>T	p.Ala56Val	missense_variant	4/31	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.167C>T	p.Ala56Val	missense_variant	4/31	1	NM_176787.5	ENSP00000492233	P1

Frequencies

GnomAD3 genomes

AF:

0.0107

AC:

1621

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00222

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00314

Gnomad ASJ

AF:

0.00173

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00290

Gnomad FIN

AF:

0.0558

Gnomad MID

AF:

0.00949

Gnomad NFE

AF:

0.0124

Gnomad OTH

AF:

0.00910

GnomAD3 exomes

AF:

0.0123

AC:

3073

AN:

249062

Hom.:

AF XY:

0.0125

AC XY:

1684

AN XY:

135108

show subpopulations

Gnomad AFR exome

AF:

0.00168

Gnomad AMR exome

AF:

0.00388

Gnomad ASJ exome

AF:

0.00248

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00320

Gnomad FIN exome

AF:

0.0534

Gnomad NFE exome

AF:

0.0140

Gnomad OTH exome

AF:

0.00994

GnomAD4 exome

AF:

0.0123

AC:

18007

AN:

1461440

Hom.:

178

Cov.:

AF XY:

0.0121

AC XY:

8792

AN XY:

727012

show subpopulations

Gnomad4 AFR exome

AF:

0.00209

Gnomad4 AMR exome

AF:

0.00400

Gnomad4 ASJ exome

AF:

0.00214

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00342

Gnomad4 FIN exome

AF:

0.0481

Gnomad4 NFE exome

AF:

0.0128

Gnomad4 OTH exome

AF:

0.00994

GnomAD4 genome

AF:

0.0106

AC:

1620

AN:

152288

Hom.:

Cov.:

AF XY:

0.0124

AC XY:

924

AN XY:

74468

show subpopulations

Gnomad4 AFR

AF:

0.00221

Gnomad4 AMR

AF:

0.00314

Gnomad4 ASJ

AF:

0.00173

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00290

Gnomad4 FIN

AF:

0.0558

Gnomad4 NFE

AF:

0.0125

Gnomad4 OTH

AF:

0.00900

Alfa

AF:

0.0113

Hom.:

Bravo

AF:

0.00692

TwinsUK

AF:

0.0111

AC:

ALSPAC

AF:

0.0132

AC:

ESP6500AA

AF:

0.00278

AC:

ESP6500EA

AF:

0.0127

AC:

106

ExAC

AF:

0.0120

AC:

1449

Asia WGS

AF:

0.00202

AC:

AN:

3478

EpiCase

AF:

0.0136

EpiControl

AF:

0.0130

ClinVar

Significance: Benign

Submissions summary: Benign:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 09, 2018	- -
Benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Sep 01, 2024	PIGN: BS1, BS2 -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

not specified

Benign:2

Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jul 11, 2017	- -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 21, 2016

This alteration is classified as 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

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 23, 2019

This variant is classified as 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

AlphaMissense

Uncertain

0.45

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Uncertain

-0.060

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.32

T;.;T;T;T;.;.;.;.;T;.;.;T;.;T;.;.;.;.;.;.;.;.;.;T;T;T;.;T

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.83

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

.;.;.;.;.;.;D;.;D;.;D;D;.;D;D;D;D;.;.;D;D;D;D;D;.;D;D;D;D

MetaRNN

Benign

0.012

T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

0.083

MutationAssessor

Pathogenic

3.1

M;.;M;M;M;.;.;.;.;M;.;.;M;.;M;.;.;.;.;.;.;.;.;.;.;.;.;.;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.64

PROVEAN

Uncertain

-3.8

.;.;.;D;.;.;.;.;.;D;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.

REVEL

Pathogenic

0.76

Sift

Pathogenic

0.0

.;.;.;D;.;.;.;.;.;D;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.

Sift4G

Uncertain

0.011

.;.;.;D;.;.;.;.;.;D;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;D;.;.

Polyphen

1.0

D;.;D;D;D;.;.;.;.;D;.;.;D;.;D;.;.;.;.;.;.;.;.;.;.;.;.;.;.

Vest4

0.31, 0.33

MPC

0.20

ClinPred

0.039

GERP RS

5.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.75

gMVP

0.82

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