chr17-7583885-C-G

Variant names:

• chr17-7583885-C-G
• rs769696421
• NM_004870.4:c.23C>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004870.4(MPDU1):​c.23C>G​(p.Pro8Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,280 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
• Consequence: MPDU1 NM_004870.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.574

Genes affected

MPDU1 (HGNC:7207): (mannose-P-dolichol utilization defect 1) This gene encodes an endoplasmic reticulum membrane protein that is required for utilization of the mannose donor mannose-P-dolichol in the synthesis of lipid-linked oligosaccharides and glycosylphosphatidylinositols. Mutations in this gene result in congenital disorder of glycosylation type If. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2008]

ENSG00000233223 (HGNC:40379): (MPDU1 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13435641).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MPDU1	NM_004870.4	c.23C>G	p.Pro8Arg	missense_variant	Exon 1 of 7	ENST00000250124.11	NP_004861.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MPDU1	ENST00000250124.11	c.23C>G	p.Pro8Arg	missense_variant	Exon 1 of 7	1	NM_004870.4	ENSP00000250124.6

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152280 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

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: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152280 Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1 AN XY: 74400

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.023	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	1.1
DANN	Benign	0.66
DEOGEN2	Benign	0.065	.;T;.;.;.;T;T
Eigen	Benign	-1.7
Eigen_PC	Benign	-1.7
FATHMM_MKL	Benign	0.055	N
LIST_S2	Benign	0.49	T;T;T;T;T;T;T
M_CAP	Benign	0.047	D
MetaRNN	Benign	0.13	T;T;T;T;T;T;T
MetaSVM	Benign	-0.76	T
MutationAssessor	Benign	1.9	.;L;.;.;L;.;.
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-2.2	.;N;N;.;D;.;.
REVEL	Benign	0.20
Sift	Benign	0.27	.;T;D;.;D;.;.
Sift4G	Benign	0.25	T;T;D;T;D;T;T
Polyphen		0.0040	.;B;.;.;.;.;.
Vest4		0.16
MutPred		0.37		Gain of helix (P = 0.0143);Gain of helix (P = 0.0143);Gain of helix (P = 0.0143);Gain of helix (P = 0.0143);Gain of helix (P = 0.0143);Gain of helix (P = 0.0143);.;
MVP		0.43
MPC		0.38
ClinPred		0.69	D
GERP RS		-8.2
Varity_R		0.061
gMVP		0.63

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: rs769696421; hg19: chr17-7487203;