Variant chrX-111681261-G-A details in Genebe, Genetics Data Aggregator

Variant summary

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

The NM_001099922.3(ALG13):c.43G>A(p.Asp15Asn) variant causes a missense change. The variant allele was found at a frequency of 0.00000364 in 1,098,097 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D15Y) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 24)

Exomes 𝑓: 0.0000036 ( 0 hom. 1 hem. )

Consequence

ALG13
NM_001099922.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.46

Variant links:

Genes affected

ALG13 (HGNC:30881): (ALG13 UDP-N-acetylglucosaminyltransferase subunit) The protein encoded by this gene is a subunit of a bipartite UDP-N-acetylglucosamine transferase. It heterodimerizes with asparagine-linked glycosylation 14 homolog to form a functional UDP-GlcNAc glycosyltransferase that catalyzes the second sugar addition of the highly conserved oligosaccharide precursor in endoplasmic reticulum N-linked glycosylation. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2009]

ALG13 links:

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ACMG classification

Classification made for transcript

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/exons	MANE	UniProt
ALG13	NM_001099922.3 linkuse as main transcript	c.43G>A	p.Asp15Asn	missense_variant	1/27	ENST00000394780.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ALG13	ENST00000394780.8 linkuse as main transcript	c.43G>A	p.Asp15Asn	missense_variant	1/27	2	NM_001099922.3	A2	Q9NP73-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000109

AC:

AN:

183176

Hom.:

AF XY:

0.00

AC XY:

AN XY:

67656

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000366

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000525

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000364

AC:

AN:

1098097

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

363459

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000284

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000185

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000238

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Developmental and epileptic encephalopathy, 36

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 01, 2021

This sequence change replaces aspartic acid with asparagine at codon 15 of the ALG13 protein (p.Asp15Asn). The aspartic acid residue is weakly conserved and there is a small physicochemical difference between aspartic acid and asparagine. This variant is present in population databases (rs776133794, ExAC 0.01%). This variant has not been reported in the literature in individuals affected with ALG13-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.39

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.21

.;T;T;.;T

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.97

D;D;D;D;D

M_CAP

Pathogenic

0.72

MetaRNN

Uncertain

0.50

D;D;D;D;D

MetaSVM

Uncertain

-0.20

MutationAssessor

Benign

1.6

L;L;.;.;.

MutationTaster

Benign

1.0

D;N;N

PrimateAI

Uncertain

0.48

PROVEAN

Benign

-1.9

N;N;.;.;.

REVEL

Uncertain

0.29

Sift

Benign

0.10

T;D;.;.;.

Sift4G

Benign

0.35

T;T;T;T;T

Polyphen

0.45

B;D;.;.;.

Vest4

0.34

MutPred

0.42

Loss of helix (P = 0.2022);Loss of helix (P = 0.2022);Loss of helix (P = 0.2022);Loss of helix (P = 0.2022);.;

MVP

0.88

MPC

0.41

ClinPred

0.64

GERP RS

4.4

Varity_R

0.27

gMVP

0.42

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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