chr2-74465236-G-C

Position:

• chr2-74465236-G-C

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 0P and 19B. BP4_Moderate BP6_Very_Strong BP7 BS1 BS2

The NM_006302.3(MOGS):​c.12C>G​(p.Gly4=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00139 in 1,442,906 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00089 (1 hom., cov: 33)
  • Exomes 𝑓: 0.0014 (3 hom.)
• Consequence: MOGS NM_006302.3 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: 0.0530

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]

ACMG classification

Verdict is Benign. Variant got -19 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.37).
• BP6: Variant 2-74465236-G-C is Benign according to our data. Variant chr2-74465236-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 384985.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-74465236-G-C is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=0.053 with no splicing effect.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000886 (135/152308) while in subpopulation NFE AF= 0.00172 (117/68016). AF 95% confidence interval is 0.00147. There are 1 homozygotes in gnomad4. There are 60 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MOGS	NM_006302.3	c.12C>G	p.Gly4=	synonymous_variant	1/4	ENST00000448666.7
MOGS	NM_001146158.2	c.-59+78C>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MOGS	ENST00000448666.7	c.12C>G	p.Gly4=	synonymous_variant	1/4	1	NM_006302.3	P1

Frequencies

GnomAD3 genomes AF: 0.000880 AC: 134 AN: 152196 Hom.: 1 Cov.: 33

Gnomad AFR AF: 0.000265

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000941

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00172

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000851 AC: 64 AN: 75236 Hom.: 2 AF XY: 0.000896 AC XY: 39 AN XY: 43540

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000708

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: 0.00129

Gnomad OTH exome AF: 0.00195

GnomAD4 exome AF: 0.00145 AC: 1868 AN: 1290598 Hom.: 3 Cov.: 31 AF XY: 0.00139 AC XY: 882 AN XY: 636178

Gnomad4 AFR exome AF: 0.0000773

Gnomad4 AMR exome AF: 0.000821

Gnomad4 ASJ exome AF: 0.000111

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000164

Gnomad4 FIN exome AF: 0.000469

Gnomad4 NFE exome AF: 0.00172

Gnomad4 OTH exome AF: 0.000695

GnomAD4 genome AF: 0.000886 AC: 135 AN: 152308 Hom.: 1 Cov.: 33 AF XY: 0.000806 AC XY: 60 AN XY: 74476

Gnomad4 AFR AF: 0.000289

Gnomad4 AMR AF: 0.000261

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000941

Gnomad4 NFE AF: 0.00172

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.00132 Hom.: 0

Bravo AF: 0.000816

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jun 01, 2023	MOGS: BP4, BP7, BS2 -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Feb 16, 2018

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

MOGS-congenital disorder of glycosylation Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 30, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.37
CADD	Benign	13
DANN	Benign	0.83

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

Other links and lift over

dbSNP: rs555329045; hg19: chr2-74692363; COSMIC: COSV52027531; COSMIC: COSV52027531;