chr4-508952-G-T

Position:

chr4-508952-G-T

Variant summary

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

The ENST00000453061.7(PIGG):c.883G>T(p.Ala295Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000883 in 1,612,254 control chromosomes in the GnomAD database, including 16 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A295V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00056 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00092 ( 16 hom. )

Consequence

PIGG
ENST00000453061.7 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 2.72

Variant links:

Genes affected

PIGG (HGNC:25985): (phosphatidylinositol glycan anchor biosynthesis class G (EMM blood group)) This gene encodes an enzyme involved in glycosylphosphatidylinositol-anchor biosynthesis. The encoded protein, which is localized to the endoplasmic reticulum, is involved in transferring ethanoloamine phosphate to mannose 2 of glycosylphosphatidylinositol species H7 to form species H8. Allelic variants of this gene have been associated with intellectual disability, hypotonia, and early-onset seizures. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2016]

PIGG 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=0.00865224).

BP6

Variant 4-508952-G-T is Benign according to our data. Variant chr4-508952-G-T is described in ClinVar as [Likely_benign]. Clinvar id is 476354.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000565 (86/152272) while in subpopulation SAS AF= 0.017 (82/4816). AF 95% confidence interval is 0.0141. There are 0 homozygotes in gnomad4. There are 55 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 16 BG,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PIGG	NM_001127178.3 linkuse as main transcript	c.883G>T	p.Ala295Ser	missense_variant	5/13	ENST00000453061.7	NP_001120650.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PIGG	ENST00000453061.7 linkuse as main transcript	c.883G>T	p.Ala295Ser	missense_variant	5/13	1	NM_001127178.3	ENSP00000415203	P4	Q5H8A4-1

Frequencies

GnomAD3 genomes

AF:

0.000572

AC:

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.0172

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00188

AC:

470

AN:

250046

Hom.:

AF XY:

0.00254

AC XY:

343

AN XY:

135104

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.0152

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00148

GnomAD4 exome

AF:

0.000916

AC:

1337

AN:

1459982

Hom.:

Cov.:

AF XY:

0.00133

AC XY:

966

AN XY:

726110

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0148

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000630

Gnomad4 OTH exome

AF:

0.000994

GnomAD4 genome

AF:

0.000565

AC:

AN:

152272

Hom.:

Cov.:

AF XY:

0.000739

AC XY:

AN XY:

74452

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.0170

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000128

Hom.:

Bravo

AF:

0.000208

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ExAC

AF:

0.00222

AC:

270

Asia WGS

AF:

0.0120

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2024	PIGG: BP4, BS1, BS2 -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 18, 2024	See Variant Classification Assertion Criteria. -

Intellectual disability, autosomal recessive 53

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 28, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.078

BayesDel_addAF

Benign

-0.53

BayesDel_noAF

Benign

-0.52

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Benign

0.0088

.;T;T;.;.;.

Eigen

Benign

-0.22

Eigen_PC

Benign

-0.063

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.79

T;T;T;T;T;T

MetaRNN

Benign

0.0087

T;T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.84

L;L;.;.;.;.

MutationTaster

Benign

1.0

D;D;D;D;D;D;D;D

PrimateAI

Benign

0.39

PROVEAN

Benign

-1.2

N;N;N;N;N;N

REVEL

Benign

0.034

Sift

Benign

0.069

T;T;T;T;T;T

Sift4G

Benign

0.64

T;T;T;T;T;T

Polyphen

0.087

B;P;.;B;P;B

Vest4

0.16

MutPred

0.49

Gain of disorder (P = 0.0209);Gain of disorder (P = 0.0209);.;.;.;.;

MVP

0.55

MPC

0.30

ClinPred

0.013

GERP RS

3.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.085

gMVP

0.54

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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