20-50958415-G-C

Variant names:

• chr20-50958415-G-C
• NM_003859.3:c.109C>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_003859.3(DPM1):​c.109C>G​(p.Arg37Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,756 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: DPM1 NM_003859.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.81

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DPM1	NM_003859.3	c.109C>G	p.Arg37Gly	missense_variant	Exon 1 of 9	ENST00000371588.10	NP_003850.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DPM1	ENST00000371588.10	c.109C>G	p.Arg37Gly	missense_variant	Exon 1 of 9	1	NM_003859.3	ENSP00000360644.5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461756 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727186

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.56
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.49	T;T;.
Eigen	Uncertain	0.32
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Pathogenic	0.99	D;D;D
M_CAP	Benign	0.045	D
MetaRNN	Uncertain	0.65	D;D;D
MetaSVM	Benign	-0.54	T
MutationAssessor	Benign	1.9	L;.;.
PrimateAI	Uncertain	0.64	T
PROVEAN	Pathogenic	-5.4	D;D;D
REVEL	Uncertain	0.39
Sift	Uncertain	0.026	D;D;D
Sift4G	Uncertain	0.022	D;D;D
Polyphen		0.12	B;.;.
Vest4		0.78
MutPred		0.46		Loss of solvent accessibility (P = 0.0092);Loss of solvent accessibility (P = 0.0092);Loss of solvent accessibility (P = 0.0092);
MVP		0.90
MPC		0.47
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.83
gMVP		0.86

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr20-49574952;