NM_003863.4:c.64A>G

Variant names:

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS1

The NM_003863.4(DPM2):c.64A>G(p.Thr22Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00018 in 1,613,386 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T22I) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0011 ( 1 hom., cov: 33)

Exomes 𝑓: 0.000086 ( 0 hom. )

Consequence

DPM2
NM_003863.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 0.308

Publications

0 publications found

Variant links:

Genes affected

DPM2 (HGNC:3006): (dolichyl-phosphate mannosyltransferase subunit 2, regulatory) Dolichol-phosphate mannose (Dol-P-Man) serves as a donor of mannosyl residues on the lumenal side of the endoplasmic reticulum (ER). Lack of Dol-P-Man results in defective surface expression of GPI-anchored proteins. Dol-P-Man is synthesized from GDP-mannose and dolichol-phosphate on the cytosolic side of the ER by the enzyme dolichyl-phosphate mannosyltransferase. The protein encoded by this gene is a hydrophobic protein that contains 2 predicted transmembrane domains and a putative ER localization signal near the C terminus. This protein associates with DPM1 in vivo and is required for the ER localization and stable expression of DPM1 and also enhances the binding of dolichol-phosphate to DPM1. [provided by RefSeq, Jul 2008]

DPM2 Gene-Disease associations (from GenCC):

congenital muscular dystrophy with intellectual disability and severe epilepsy
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia, Orphanet

DPM2 links:

ENSG00000227218 (HGNC:):

ENSG00000227218 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0116123855).

BP6

Variant 9-127937463-T-C is Benign according to our data. Variant chr9-127937463-T-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 392159.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00109 (165/151924) while in subpopulation AFR AF = 0.00391 (162/41390). AF 95% confidence interval is 0.00342. There are 1 homozygotes in GnomAd4. There are 87 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003863.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
DPM2	NM_003863.4	MANE Select	c.64A>G	p.Thr22Ala	missense	Exon 2 of 4	NP_003854.1
DPM2	NM_001378436.1		c.64A>G	p.Thr22Ala	missense	Exon 2 of 3	NP_001365365.1
DPM2	NR_165631.1		n.98A>G		non_coding_transcript_exon	Exon 2 of 4

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
DPM2	ENST00000314392.13	TSL:1 MANE Select	c.64A>G	p.Thr22Ala	missense	Exon 2 of 4	ENSP00000322181.8
DPM2	ENST00000470181.1	TSL:1	n.356A>G		non_coding_transcript_exon	Exon 1 of 3
DPM2	ENST00000495270.1	TSL:1	n.70A>G		non_coding_transcript_exon	Exon 2 of 3

Frequencies

GnomAD3 genomes

AF:

0.00109

AC:

165

AN:

151806

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00393

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000243

AC:

AN:

250794

AF XY:

0.000170

show subpopulations

Gnomad AFR exome

AF:

0.00357

Gnomad AMR exome

AF:

0.0000869

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.0000862

AC:

126

AN:

1461462

Hom.:

Cov.:

AF XY:

0.0000688

AC XY:

AN XY:

727022

show subpopulations

African (AFR)

AF:

0.00326

AC:

109

AN:

33454

American (AMR)

AF:

0.000112

AC:

AN:

44670

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39664

South Asian (SAS)

AF:

0.00

AC:

AN:

86218

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53402

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111786

Other (OTH)

AF:

0.000149

AC:

AN:

60374

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

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:

0.00109

AC:

165

AN:

151924

Hom.:

Cov.:

AF XY:

0.00117

AC XY:

AN XY:

74258

show subpopulations

African (AFR)

AF:

0.00391

AC:

162

AN:

41390

American (AMR)

AF:

0.000131

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4804

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10564

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67930

Other (OTH)

AF:

0.000473

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

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:

0.000316

Hom.:

Bravo

AF:

0.00104

ESP6500AA

AF:

0.00409

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000272

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

Mar 07, 2019

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not specified

Benign:1

Aug 12, 2020

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Congenital muscular dystrophy with intellectual disability and severe epilepsy

Benign:1

Jan 13, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

DPM2-related disorder

Benign:1

Nov 28, 2023

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications).

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.066

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.43

CADD

Benign

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.15

Eigen

Benign

-0.39

Eigen_PC

Benign

-0.27

FATHMM_MKL

Benign

0.50

LIST_S2

Uncertain

0.87

M_CAP

Benign

0.013

MetaRNN

Benign

0.012

MetaSVM

Benign

-0.99

PhyloP100

0.31

PrimateAI

Benign

0.44

PROVEAN

Benign

-2.0

REVEL

Benign

0.14

Sift

Benign

0.28

Sift4G

Benign

0.21

Polyphen

0.0

Vest4

0.094

MVP

0.67

MPC

0.61

ClinPred

0.014

GERP RS

1.3

PromoterAI

0.042

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.11

gMVP

0.40

Mutation Taster

=94/6

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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over