X-111681261-G-T

Variant summary

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

The NM_001099922.3(ALG13):c.43G>T(p.Asp15Tyr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. D15N) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 24)
• Consequence: ALG13 NM_001099922.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.46

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]

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/exons	MANE	UniProt
ALG13	NM_001099922.3	c.43G>T	p.Asp15Tyr	missense_variant	1/27	ENST00000394780.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ALG13	ENST00000394780.8	c.43G>T	p.Asp15Tyr	missense_variant	1/27	2	NM_001099922.3	A2

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 24

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Developmental and epileptic encephalopathy, 36 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Sep 01, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.040
Cadd	Pathogenic	30
Dann	Uncertain	0.99
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D;D;D;D;D
M_CAP	Pathogenic	0.70	D
MetaRNN	Uncertain	0.63	D;D;D;D;D
MetaSVM	Uncertain	0.25	D
MutationAssessor	Uncertain	2.7	M;M;.;.;.
MutationTaster	Benign	1.0	D;N;N
PrimateAI	Uncertain	0.50	T
PROVEAN	Uncertain	-3.8	D;N;.;.;.
REVEL	Uncertain	0.58
Sift	Uncertain	0.010	D;D;.;.;.
Sift4G	Uncertain	0.026	D;D;D;D;D
Polyphen		0.86	P;D;.;.;.
Vest4		0.45
MutPred		0.51		Loss of catalytic residue at D15 (P = 0.1446);Loss of catalytic residue at D15 (P = 0.1446);Loss of catalytic residue at D15 (P = 0.1446);Loss of catalytic residue at D15 (P = 0.1446);.;
MVP		0.85
MPC		0.76
ClinPred		0.99	D
GERP RS		4.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.79
gMVP		0.65

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs776133794; hg19: chrX-110924489;