X-15321558-T-C

Position:

chrX-15321558-T-C

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_002641.4(PIGA):c.1403A>G(p.Tyr468Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000015 in 1,203,943 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 4 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.000016 ( 0 hom. 4 hem. )

Consequence

PIGA
NM_002641.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.109

Variant links:

Genes affected

PIGA (HGNC:8957): (phosphatidylinositol glycan anchor biosynthesis class A) This gene encodes a protein required for synthesis of N-acetylglucosaminyl phosphatidylinositol (GlcNAc-PI), the first intermediate in the biosynthetic pathway of GPI anchor. The GPI anchor is a glycolipid found on many blood cells and which serves to anchor proteins to the cell surface. Paroxysmal nocturnal hemoglobinuria, an acquired hematologic disorder, has been shown to result from mutations in this gene. Alternate splice variants have been characterized. A related pseudogene is located on chromosome 12. [provided by RefSeq, Jun 2010]

PIGA links:

PIGA (HGNC:):

PIGA links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.023509651).

BP6

Variant X-15321558-T-C is Benign according to our data. Variant chrX-15321558-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 1601074.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High Hemizygotes in GnomAdExome4 at 4 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PIGA	NM_002641.4 linkuse as main transcript	c.1403A>G	p.Tyr468Cys	missense_variant	6/6	ENST00000333590.6	NP_002632.1	P37287-1A0A2K4ZA02

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PIGA	ENST00000333590.6 linkuse as main transcript	c.1403A>G	p.Tyr468Cys	missense_variant	6/6	1	NM_002641.4	ENSP00000369820.3		P37287-1

Frequencies

GnomAD3 genomes

AF:

0.00000889

AC:

AN:

112492

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34624

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000277

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000104

AC:

AN:

183452

Hom.:

AF XY:

0.0000736

AC XY:

AN XY:

67902

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000729

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00123

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000156

AC:

AN:

1091398

Hom.:

Cov.:

AF XY:

0.0000112

AC XY:

AN XY:

356898

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000284

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000431

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000359

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000889

AC:

AN:

112545

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34687

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000277

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000453

ExAC

AF:

0.0000659

AC:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Multiple congenital anomalies-hypotonia-seizures syndrome 2

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

May 04, 2022

- -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 19, 2022

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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.061

BayesDel_addAF

Benign

-0.70

BayesDel_noAF

Benign

-0.82

CADD

Benign

0.085

DANN

Benign

0.23

DEOGEN2

Benign

0.19

T;T;T;.;.

FATHMM_MKL

Benign

0.17

LIST_S2

Benign

0.41

.;T;T;T;T

M_CAP

Benign

0.0041

MetaRNN

Benign

0.024

T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.2

L;L;.;.;.

PrimateAI

Benign

0.24

PROVEAN

Benign

-0.98

N;.;.;.;.

REVEL

Benign

0.0050

Sift

Benign

0.18

T;.;.;.;.

Sift4G

Benign

0.17

T;T;.;T;T

Polyphen

0.0

B;B;.;.;B

Vest4

0.12

MutPred

0.22

Loss of disorder (P = 0.0998);Loss of disorder (P = 0.0998);.;.;.;

MVP

0.24

MPC

0.70

ClinPred

0.017

GERP RS

-3.2

Varity_R

0.070

gMVP

0.64

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