chr20-50935230-T-C

Position:

chr20-50935230-T-C

Variant summary

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

The NM_003859.3(DPM1):c.685A>G(p.Ile229Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000769 in 1,585,922 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 0.00028 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000059 ( 0 hom. )

Consequence

DPM1
NM_003859.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 7.47

Variant links:

Genes affected

DPM1 (HGNC:3005): (dolichyl-phosphate mannosyltransferase subunit 1, catalytic) 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. Human DPM1 lacks a carboxy-terminal transmembrane domain and signal sequence and is regulated by DPM2. Mutations in this gene are associated with congenital disorder of glycosylation type Ie. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2015]

DPM1 links:

ADNP-AS1 (HGNC:51227): (ADNP antisense RNA 1)

ADNP-AS1 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=0.07531884).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000277 (37/133576) while in subpopulation AMR AF= 0.00181 (25/13820). AF 95% confidence interval is 0.00126. There are 0 homozygotes in gnomad4. There are 17 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	UniProt
DPM1	NM_003859.3 linkuse as main transcript	c.685A>G	p.Ile229Val	missense_variant	9/9	ENST00000371588.10
ADNP-AS1	NR_110008.1 linkuse as main transcript	n.149+3781T>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DPM1	ENST00000371588.10 linkuse as main transcript	c.685A>G	p.Ile229Val	missense_variant	9/9	1	NM_003859.3	P1
ADNP-AS1	ENST00000558899.2 linkuse as main transcript	n.149+3781T>C		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.000277

AC:

AN:

133484

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000175

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00181

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:

0.000107

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000121

AC:

AN:

248554

Hom.:

AF XY:

0.0000967

AC XY:

AN XY:

134428

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000471

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000100

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000354

Gnomad OTH exome

AF:

0.00115

GnomAD4 exome

AF:

0.0000585

AC:

AN:

1452346

Hom.:

Cov.:

AF XY:

0.0000553

AC XY:

AN XY:

723214

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000829

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000506

Gnomad4 SAS exome

AF:

0.0000233

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000281

Gnomad4 OTH exome

AF:

0.000216

GnomAD4 genome

AF:

0.000277

AC:

AN:

133576

Hom.:

Cov.:

AF XY:

0.000261

AC XY:

AN XY:

65096

show subpopulations

Gnomad4 AFR

AF:

0.000174

Gnomad4 AMR

AF:

0.00181

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000107

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000572

Hom.:

Bravo

AF:

0.000729

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Congenital disorder of glycosylation type 1E

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Aug 04, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Nov 22, 2019	This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 13, 2022	This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 229 of the DPM1 protein (p.Ile229Val). This variant is present in population databases (rs559946698, gnomAD 0.05%). This variant has not been reported in the literature in individuals affected with DPM1-related conditions. ClinVar contains an entry for this variant (Variation ID: 565495). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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

Mar 20, 2023

Reported as a de novo variant in an individual with schizophrenia, but additional clinical information was not included (Fromer et al., 2014); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 25420024, 30323833, 34145229, 24463507) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.26

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Uncertain

-0.080

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.33

T;T

Eigen

Uncertain

0.41

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

0.98

D;D

M_CAP

Benign

0.027

MetaRNN

Benign

0.075

T;T

MetaSVM

Uncertain

-0.082

MutationAssessor

Uncertain

2.9

M;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.63

PROVEAN

Benign

-0.96

N;N

REVEL

Benign

0.29

Sift

Uncertain

0.0010

D;D

Sift4G

Uncertain

0.036

D;T

Polyphen

1.0

D;.

Vest4

0.39

MVP

0.63

MPC

0.26

ClinPred

0.20

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.31

gMVP

0.57

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