Genetic Variant MPDU1:p.Ala229Ser (chr17-7587492-G-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The ENST00000250124.11(MPDU1):c.685G>T(p.Ala229Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,613,126 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A229P) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 29)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MPDU1
ENST00000250124.11 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.903

Publications

38 publications found

Variant links:

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]

MPDU1 Gene-Disease associations (from GenCC):

MPDU1-congenital disorder of glycosylation
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Orphanet, G2P

MPDU1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11248237).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000250124.11. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
MPDU1	NM_004870.4	MANE Select	c.685G>T	p.Ala229Ser	missense	Exon 7 of 7	NP_004861.2
MPDU1	NR_024603.1		n.896G>T		non_coding_transcript_exon	Exon 7 of 7
MPDU1	NM_001330073.1		c.*48G>T		3_prime_UTR	Exon 6 of 6	NP_001317002.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
MPDU1	ENST00000250124.11	TSL:1 MANE Select	c.685G>T	p.Ala229Ser	missense	Exon 7 of 7	ENSP00000250124.6
MPDU1	ENST00000571877.1	TSL:1	n.870G>T		non_coding_transcript_exon	Exon 2 of 2
MPDU1	ENST00000359822.10	TSL:3	n.*436G>T		non_coding_transcript_exon	Exon 6 of 6	ENSP00000352876.6

Frequencies

GnomAD3 genomes

AF:

0.00000661

AC:

AN:

151274

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000243

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251360

AF XY:

0.00000736

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461852

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727224

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53390

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112004

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000661

AC:

AN:

151274

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

73838

show subpopulations

African (AFR)

AF:

0.0000243

AC:

AN:

41084

American (AMR)

AF:

0.00

AC:

AN:

15152

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3464

East Asian (EAS)

AF:

0.00

AC:

AN:

5094

South Asian (SAS)

AF:

0.00

AC:

AN:

4796

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10498

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67886

Other (OTH)

AF:

0.00

AC:

AN:

2074

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

4706

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.070

BayesDel_noAF

Benign

-0.34

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.0034

Eigen

Benign

-0.13

Eigen_PC

Benign

-0.15

FATHMM_MKL

Benign

0.36

LIST_S2

Benign

0.70

M_CAP

Benign

0.0067

MetaRNN

Benign

0.11

MetaSVM

Benign

-0.90

MutationAssessor

Uncertain

2.4

PhyloP100

0.90

PrimateAI

Benign

0.30

PROVEAN

Benign

-1.1

REVEL

Benign

0.053

Sift

Benign

0.23

Sift4G

Benign

0.39

Polyphen

0.41

Vest4

0.13

MutPred

0.35

Loss of helix (P = 0.2271)

MVP

0.67

MPC

0.34

ClinPred

0.10

GERP RS

2.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.025

gMVP

0.32

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over