2-74462305-C-T

Position:

chr2-74462305-C-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBS1_Supporting

The NM_006302.3(MOGS):c.1484G>A(p.Arg495Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000923 in 1,613,714 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R495P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00019 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000082 ( 0 hom. )

Consequence

MOGS
NM_006302.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.63

Variant links:

Genes affected

MOGS (HGNC:24862): (mannosyl-oligosaccharide glucosidase) This gene encodes the first enzyme in the N-linked oligosaccharide processing pathway. The enzyme cleaves the distal alpha-1,2-linked glucose residue from the Glc(3)-Man(9)-GlcNAc(2) oligosaccharide precursor. This protein is located in the lumen of the endoplasmic reticulum. Defects in this gene are a cause of type IIb congenital disorder of glycosylation (CDGIIb). Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2009]

MOGS links:

MOGS (HGNC:):

MOGS links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.12978765).

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000191 (29/152180) while in subpopulation SAS AF= 0.000828 (4/4830). AF 95% confidence interval is 0.000339. There are 0 homozygotes in gnomad4. There are 13 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
MOGS	NM_006302.3 linkuse as main transcript	c.1484G>A	p.Arg495Gln	missense_variant	4/4	ENST00000448666.7	NP_006293.2	Q13724-1A0A384MDR6
MOGS	NM_001146158.2 linkuse as main transcript	c.1166G>A	p.Arg389Gln	missense_variant	5/5		NP_001139630.1	Q13724-2Q58F09

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MOGS	ENST00000448666.7 linkuse as main transcript	c.1484G>A	p.Arg495Gln	missense_variant	4/4	1	NM_006302.3	ENSP00000410992.3		Q13724-1

Frequencies

GnomAD3 genomes

AF:

0.000191

AC:

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000507

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000828

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000149

AC:

AN:

248460

Hom.:

AF XY:

0.000171

AC XY:

AN XY:

134864

show subpopulations

Gnomad AFR exome

AF:

0.000519

Gnomad AMR exome

AF:

0.0000580

Gnomad ASJ exome

AF:

0.0000994

Gnomad EAS exome

AF:

0.000168

Gnomad SAS exome

AF:

0.000621

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000354

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000821

AC:

120

AN:

1461534

Hom.:

Cov.:

AF XY:

0.0000977

AC XY:

AN XY:

727056

show subpopulations

Gnomad4 AFR exome

AF:

0.000179

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.000151

Gnomad4 SAS exome

AF:

0.000661

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.0000252

Gnomad4 OTH exome

AF:

0.000281

GnomAD4 genome

AF:

0.000191

AC:

AN:

152180

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.000507

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000828

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000253

Hom.:

Bravo

AF:

0.000234

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.000517

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000149

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

MOGS-congenital disorder of glycosylation

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 30, 2023

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 495 of the MOGS protein (p.Arg495Gln). This variant is present in population databases (rs34075781, gnomAD 0.06%). This variant has not been reported in the literature in individuals affected with MOGS-related conditions. ClinVar contains an entry for this variant (Variation ID: 534242). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt MOGS protein function with a negative predictive value of 80%. 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. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Apr 21, 2023

In silico analysis supports that this missense variant does not alter protein structure/function; Reported as a single heterozygous variant in a patient from a cohort of individuals diagnosed with CVID (PMID 33859323); This variant is associated with the following publications: (PMID: 36681659, 33859323) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.30

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.14

T;T;.;.;.;.

Eigen

Uncertain

0.23

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Uncertain

0.88

LIST_S2

Uncertain

0.90

.;D;.;D;D;D

M_CAP

Benign

0.015

MetaRNN

Benign

0.13

T;T;T;T;T;T

MetaSVM

Benign

-0.94

MutationAssessor

Pathogenic

3.1

M;M;.;.;.;.

PrimateAI

Benign

0.42

PROVEAN

Benign

-2.1

.;N;.;.;N;.

REVEL

Benign

0.19

Sift

Benign

0.066

.;T;.;.;T;.

Sift4G

Benign

0.081

.;T;.;.;T;.

Polyphen

0.73

P;P;.;.;.;.

Vest4

0.20, 0.17

MVP

0.71

MPC

0.47

ClinPred

0.089

GERP RS

4.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.9

Varity_R

0.16

gMVP

0.86

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