2-74462305-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP4_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 (★★).

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

Publications

5 publications found

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 Gene-Disease associations (from GenCC):

MOGS-congenital disorder of glycosylation
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, G2P, Orphanet, PanelApp Australia, ClinGen, Labcorp Genetics (formerly Invitae)

MOGS links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

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 the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MOGS	NM_006302.3 link	c.1484G>A	p.Arg495Gln	missense_variant	Exon 4 of 4	ENST00000448666.7	NP_006293.2	Q13724-1A0A384MDR6
MOGS	NM_001146158.2 link	c.1166G>A	p.Arg389Gln	missense_variant	Exon 5 of 5		NP_001139630.1	Q13724-2Q58F09

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MOGS	ENST00000448666.7 link	c.1484G>A	p.Arg495Gln	missense_variant	Exon 4 of 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

GnomAD2 exomes

AF:

0.000149

AC:

AN:

248460

AF XY:

0.000171

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 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

African (AFR)

AF:

0.000179

AC:

AN:

33480

American (AMR)

AF:

0.0000671

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26136

East Asian (EAS)

AF:

0.000151

AC:

AN:

39700

South Asian (SAS)

AF:

0.000661

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.0000188

AC:

AN:

53072

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000252

AC:

AN:

1112000

Other (OTH)

AF:

0.000281

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000191

AC:

AN:

152180

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74344

show subpopulations

African (AFR)

AF:

0.000507

AC:

AN:

41440

American (AMR)

AF:

0.00

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.000828

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68024

Other (OTH)

AF:

0.000478

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000162

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

Dec 30, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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

Apr 21, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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

(source)

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;.;.;.;.

PhyloP100

1.6

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

Mutation Taster

=85/15

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over