Genetic Variant NM_006302.3:c.894C>T (chr2-74462895-G-A) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_006302.3(MOGS):c.894C>T(p.Leu298Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000541 in 1,614,148 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Synonymous variant affecting the same amino acid position (i.e. L298L) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0030 ( 3 hom., cov: 33)

Exomes 𝑓: 0.00028 ( 2 hom. )

Consequence

MOGS
NM_006302.3 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: -0.844

Publications

0 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: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P, ClinGen

MOGS links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BP6

Variant 2-74462895-G-A is Benign according to our data. Variant chr2-74462895-G-A is described in ClinVar as Benign. ClinVar VariationId is 506721.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.844 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00301 (459/152354) while in subpopulation AFR AF = 0.0107 (443/41586). AF 95% confidence interval is 0.00983. There are 3 homozygotes in GnomAd4. There are 230 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 3 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006302.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MOGS	NM_006302.3	MANE Select	c.894C>T	p.Leu298Leu	synonymous	Exon 4 of 4	NP_006293.2	A0A384MDR6
	MOGS	NM_001146158.2		c.576C>T	p.Leu192Leu	synonymous	Exon 5 of 5	NP_001139630.1	Q13724-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MOGS	ENST00000448666.7	TSL:1 MANE Select	c.894C>T	p.Leu298Leu	synonymous	Exon 4 of 4	ENSP00000410992.3	Q13724-1
MOGS	ENST00000452063.7	TSL:1	c.576C>T	p.Leu192Leu	synonymous	Exon 5 of 5	ENSP00000388201.2	Q13724-2
MOGS	ENST00000690565.1		c.894C>T	p.Leu298Leu	synonymous	Exon 4 of 5	ENSP00000510501.1	A0A8I5KTK5

Frequencies

GnomAD3 genomes

AF:

0.00300

AC:

456

AN:

152236

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0106

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000916

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000955

GnomAD2 exomes

AF:

0.000730

AC:

182

AN:

249336

AF XY:

0.000599

show subpopulations

Gnomad AFR exome

AF:

0.0109

Gnomad AMR exome

AF:

0.000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000884

Gnomad OTH exome

AF:

0.000495

GnomAD4 exome

AF:

0.000284

AC:

415

AN:

1461794

Hom.:

Cov.:

AF XY:

0.000252

AC XY:

183

AN XY:

727220

show subpopulations

African (AFR)

AF:

0.00998

AC:

334

AN:

33478

American (AMR)

AF:

0.000313

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000348

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53328

Middle Eastern (MID)

AF:

0.00121

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000899

AC:

AN:

1112010

Other (OTH)

AF:

0.000745

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

118

147

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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:

0.00301

AC:

459

AN:

152354

Hom.:

Cov.:

AF XY:

0.00309

AC XY:

230

AN XY:

74508

show subpopulations

African (AFR)

AF:

0.0107

AC:

443

AN:

41586

American (AMR)

AF:

0.000915

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.000945

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

123

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00141

Hom.:

Bravo

AF:

0.00324

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

MOGS-congenital disorder of glycosylation (1)

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

0.49

(source)

DANN

Benign

0.79

PhyloP100

-0.84

Mutation Taster

=100/0

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over