chr16-582287-G-A

Position:

chr16-582287-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting

The NM_004204.5(PIGQ):c.1571G>A(p.Arg524Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000817 in 1,603,730 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/15 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00047 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000041 ( 1 hom. )

Consequence

PIGQ
NM_004204.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1B:1

Conservation

PhyloP100: 2.73

Variant links:

Genes affected

PIGQ (HGNC:14135): (phosphatidylinositol glycan anchor biosynthesis class Q) This gene is involved in the first step 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 gene encodes a N-acetylglucosaminyl transferase component that is part of the complex that catalyzes transfer of N-acetylglucosamine (GlcNAc) from UDP-GlcNAc to phosphatidylinositol (PI). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2012]

PIGQ links:

PIGQ (HGNC:):

PIGQ links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.013310432).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000466 (71/152374) while in subpopulation AFR AF= 0.00163 (68/41594). AF 95% confidence interval is 0.00132. There are 0 homozygotes in gnomad4. There are 38 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PIGQ	NM_004204.5 linkuse as main transcript	c.1571G>A	p.Arg524Lys	missense_variant	10/11	ENST00000321878.10	NP_004195.2	Q9BRB3-2B2RAU6
PIGQ	NM_148920.4 linkuse as main transcript	c.1532-596G>A		intron_variant			NP_683721.1	Q9BRB3-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PIGQ	ENST00000321878.10 linkuse as main transcript	c.1571G>A	p.Arg524Lys	missense_variant	10/11	1	NM_004204.5	ENSP00000326674.6		Q9BRB3-2

Frequencies

GnomAD3 genomes

AF:

0.000473

AC:

AN:

152256

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00166

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000129

AC:

AN:

239518

Hom.:

AF XY:

0.000115

AC XY:

AN XY:

130790

show subpopulations

Gnomad AFR exome

AF:

0.00182

Gnomad AMR exome

AF:

0.0000881

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

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:

0.0000413

AC:

AN:

1451356

Hom.:

Cov.:

AF XY:

0.0000361

AC XY:

AN XY:

720530

show subpopulations

Gnomad4 AFR exome

AF:

0.00153

Gnomad4 AMR exome

AF:

0.000113

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.04e-7

Gnomad4 OTH exome

AF:

0.0000501

GnomAD4 genome

AF:

0.000466

AC:

AN:

152374

Hom.:

Cov.:

AF XY:

0.000510

AC XY:

AN XY:

74512

show subpopulations

Gnomad4 AFR

AF:

0.00163

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000402

Hom.:

Bravo

AF:

0.000468

ESP6500AA

AF:

0.00159

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000124

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Epilepsy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 18, 2023

This sequence change replaces arginine, which is basic and polar, with lysine, which is basic and polar, at codon 524 of the PIGQ protein (p.Arg524Lys). This variant is present in population databases (rs143762913, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with PIGQ-related conditions. ClinVar contains an entry for this variant (Variation ID: 526276). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

PIGQ-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 20, 2022

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_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.40

CADD

Benign

DANN

Benign

0.83

DEOGEN2

Benign

0.0043

.;.;T

Eigen

Benign

-0.63

Eigen_PC

Benign

-0.43

FATHMM_MKL

Benign

0.65

LIST_S2

Benign

0.64

.;T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.013

T;T;T

MetaSVM

Benign

-1.1

PROVEAN

Benign

-0.34

N;N;N

REVEL

Benign

0.12

Sift

Benign

0.68

T;T;T

Sift4G

Benign

0.69

T;T;T

Polyphen

0.0010

B;B;.

Vest4

0.24

MVP

0.16

ClinPred

0.012

GERP RS

2.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

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