Variant 1-26790820-G-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_017837.4(PIGV):c.5G>C(p.Trp2Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000411 in 1,461,542 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

PIGV
NM_017837.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 1.58

Variant links:

Genes affected

PIGV (HGNC:26031): (phosphatidylinositol glycan anchor biosynthesis class V) This gene encodes a mannosyltransferase enzyme involved in the biosynthesis of glycosylphosphatidylinositol (GPI). GPI is a complex glycolipid that functions as a membrane anchor for many proteins and plays a role in multiple cellular processes including protein sorting and signal transduction. The encoded protein is localized to the endoplasmic reticulum and transfers the second mannose to the GPI backbone. Mutations in this gene are associated with hyperphosphatasia cognitive disability syndrome. Alternatively spliced transcript variants have been observed for this gene. [provided by RefSeq, Feb 2011]

PIGV links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.26613003).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PIGV	NM_017837.4 linkuse as main transcript	c.5G>C	p.Trp2Ser	missense_variant	2/4	ENST00000674202.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PIGV	ENST00000674202.1 linkuse as main transcript	c.5G>C	p.Trp2Ser	missense_variant	2/4		NM_017837.4	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251426

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135880

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000173

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:

0.00000411

AC:

AN:

1461542

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727102

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000134

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jan 11, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jun 15, 2022	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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 393109). This variant has not been reported in the literature in individuals affected with PIGV-related conditions. This variant is present in population databases (rs768302053, gnomAD 0.02%). This sequence change replaces tryptophan, which is neutral and slightly polar, with serine, which is neutral and polar, at codon 2 of the PIGV protein (p.Trp2Ser). -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jan 27, 2017	A variant of uncertain significance has been identified in the PIGV gene. The W2S variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. The W2S variant is not observed at a significant frequency in large population cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). The W2S variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. However, this substitution occurs at a position that is not conserved. In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 03, 2024

The c.5G>C (p.W2S) alteration is located in exon 2 (coding exon 1) of the PIGV gene. This alteration results from a G to C substitution at nucleotide position 5, causing the tryptophan (W) at amino acid position 2 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Benign

-0.12

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.016

.;T;.;T;.

Eigen

Benign

-0.025

Eigen_PC

Benign

0.11

FATHMM_MKL

Benign

0.70

LIST_S2

Benign

0.47

T;.;T;T;T

M_CAP

Benign

0.057

MetaRNN

Benign

0.27

T;T;T;T;T

MetaSVM

Benign

-0.53

MutationAssessor

Benign

1.5

.;L;.;L;.

MutationTaster

Benign

0.98

D;D;D

PrimateAI

Uncertain

0.55

PROVEAN

Benign

-2.3

N;N;N;N;N

REVEL

Uncertain

0.31

Sift

Pathogenic

0.0

D;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;D

Polyphen

0.28

.;B;.;B;.

Vest4

0.52, 0.47

MutPred

0.28

Gain of phosphorylation at W2 (P = 0.0225);Gain of phosphorylation at W2 (P = 0.0225);Gain of phosphorylation at W2 (P = 0.0225);Gain of phosphorylation at W2 (P = 0.0225);Gain of phosphorylation at W2 (P = 0.0225);

MVP

0.93

MPC

0.76

ClinPred

0.32

GERP RS

3.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Varity_R

0.14

gMVP

0.48

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