Variant 2-196841239-T-C details in Genebe, Genetics Data Aggregator

Variant summary

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

The NM_024989.4(PGAP1):c.2764A>G(p.Met922Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,459,296 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

PGAP1
NM_024989.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.924

Variant links:

Genes affected

PGAP1 (HGNC:25712): (post-GPI attachment to proteins inositol deacylase 1) The protein encoded by this gene functions early in the glycosylphosphatidylinositol (GPI) biosynthetic pathway, catalyzing the inositol deacylation of GPI. The encoded protein is required for the production of GPI that can attach to proteins, and this may be an important factor in the transport of GPI-anchored proteins from the endoplasmic reticulum to the Golgi. Defects in this gene are a cause an autosomal recessive form of cognitive impairment. [provided by RefSeq, Jul 2017]

PGAP1 links:

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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=0.054406494).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PGAP1	NM_024989.4 linkuse as main transcript	c.2764A>G	p.Met922Val	missense_variant	27/27	ENST00000354764.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PGAP1	ENST00000354764.9 linkuse as main transcript	c.2764A>G	p.Met922Val	missense_variant	27/27	1	NM_024989.4	P1	Q75T13-1
PGAP1	ENST00000423035.5 linkuse as main transcript	c.*2695A>G		3_prime_UTR_variant, NMD_transcript_variant	28/28	1
PGAP1	ENST00000422444.1 linkuse as main transcript	c.475A>G	p.Met159Val	missense_variant	4/4	2
PGAP1	ENST00000459896.5 linkuse as main transcript	n.105+1482A>G		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000402

AC:

AN:

248534

Hom.:

AF XY:

0.00000745

AC XY:

AN XY:

134290

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000296

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:

0.00000206

AC:

AN:

1459296

Hom.:

Cov.:

AF XY:

0.00000276

AC XY:

AN XY:

725910

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000226

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:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Intellectual disability, autosomal recessive 42

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 24, 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 (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. This variant has not been reported in the literature in individuals affected with PGAP1-related conditions. This variant is present in population databases (rs768633076, gnomAD 0.003%). This sequence change replaces methionine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 922 of the PGAP1 protein (p.Met922Val). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.065

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.60

CADD

Benign

DANN

Benign

0.26

DEOGEN2

Benign

0.049

T;.

Eigen

Benign

-0.96

Eigen_PC

Benign

-0.81

FATHMM_MKL

Benign

0.53

LIST_S2

Benign

0.64

T;T

M_CAP

Benign

0.0017

MetaRNN

Benign

0.054

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.060

N;.

MutationTaster

Benign

0.99

PrimateAI

Uncertain

0.51

PROVEAN

Benign

0.0

N;N

REVEL

Benign

0.037

Sift

Benign

0.35

T;T

Sift4G

Benign

1.0

T;D

Polyphen

0.0

B;.

Vest4

0.067

MutPred

0.48

Loss of disorder (P = 0.0514);.;

MVP

0.10

MPC

0.20

ClinPred

0.046

GERP RS

1.0

Varity_R

0.081

gMVP

0.29

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