rs199735408

Positions:

chr16-575973-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The ENST00000470411.2(PIGQ):c.824G>A(p.Cys275Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00015 in 1,581,706 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/16 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00015 ( 0 hom. )

Consequence

PIGQ
ENST00000470411.2 missense

Scores

Splicing: ADA: 0.0001971

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.201

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:

ENSG00000282907 (HGNC:):

ENSG00000282907 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.006257713).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PIGQ	NM_004204.5 link	c.821+3G>A		splice_region_variant, intron_variant		ENST00000321878.10	NP_004195.2	Q9BRB3-2B2RAU6
PIGQ	NM_148920.4 link	c.821+3G>A		splice_region_variant, intron_variant			NP_683721.1	Q9BRB3-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PIGQ	ENST00000321878.10 link	c.821+3G>A		splice_region_variant, intron_variant		1	NM_004204.5	ENSP00000326674.6		Q9BRB3-2

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152212

Hom.:

Cov.:

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:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00104

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000914

AC:

AN:

196982

Hom.:

AF XY:

0.000104

AC XY:

AN XY:

105618

show subpopulations

Gnomad AFR exome

AF:

0.0000823

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000420

Gnomad NFE exome

AF:

0.000118

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000152

AC:

217

AN:

1429376

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

101

AN XY:

708034

show subpopulations

Gnomad4 AFR exome

AF:

0.0000606

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000245

Gnomad4 FIN exome

AF:

0.000623

Gnomad4 NFE exome

AF:

0.000163

Gnomad4 OTH exome

AF:

0.0000506

GnomAD4 genome

AF:

0.000138

AC:

AN:

152330

Hom.:

Cov.:

AF XY:

0.000228

AC XY:

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00104

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000224

Hom.:

Bravo

AF:

0.0000604

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000133

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain: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

Oct 13, 2022

This sequence change falls in intron 3 of the PIGQ gene. It does not directly change the encoded amino acid sequence of the PIGQ protein. It affects a nucleotide within the consensus splice site. This variant is present in population databases (rs199735408, gnomAD 0.04%). 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: 571164). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.48

BayesDel_noAF

Benign

-0.71

CADD

Benign

8.0

DANN

Benign

0.73

Eigen

Benign

-0.66

Eigen_PC

Benign

-0.93

FATHMM_MKL

Benign

0.034

LIST_S2

Benign

0.69

M_CAP

Benign

0.015

MetaRNN

Benign

0.0063

MetaSVM

Benign

-1.0

PROVEAN

Benign

0.60

REVEL

Benign

0.033

Sift

Uncertain

0.0040

Sift4G

Uncertain

0.032

Polyphen

0.0030

Vest4

0.091

MVP

0.29

ClinPred

0.0091

GERP RS

-5.9

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00020

dbscSNV1_RF

Benign

0.10

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