X-111708073-G-C

Position:

• chrX-111708073-G-C

Variant summary

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

The NM_001099922.3(ALG13):​c.430G>C​(p.Gly144Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 11/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Synonymous variant affecting the same amino acid position (i.e. G144G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 23)
• Consequence: ALG13 NM_001099922.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.27

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-AS1 (HGNC:41277): (ALG13 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=0.18436438).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ALG13	NM_001099922.3	c.430G>C	p.Gly144Arg	missense_variant	4/27	ENST00000394780.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ALG13	ENST00000394780.8	c.430G>C	p.Gly144Arg	missense_variant	4/27	2	NM_001099922.3	A2
ALG13-AS1	ENST00000430794.1	n.107-1336C>G		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 23

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jun 15, 2023

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	19
DANN	Uncertain	0.98
DEOGEN2	Benign	0.22	T;.;.;.;.
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Benign	0.79	T;T;.;T;.
M_CAP	Pathogenic	0.29	D
MetaRNN	Benign	0.18	T;T;T;T;T
MetaSVM	Benign	-0.87	T
MutationAssessor	Benign	0.55	N;.;.;.;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-1.1	N;.;N;.;.
REVEL	Benign	0.067
Sift	Benign	0.045	D;.;D;.;.
Sift4G	Uncertain	0.0070	D;D;T;T;T
Polyphen		0.28	B;B;B;B;B
Vest4		0.075
MutPred		0.31		Gain of solvent accessibility (P = 0.0097);.;.;.;.;
MVP		0.56
MPC		0.21
ClinPred		0.34	T
GERP RS		3.4
Varity_R		0.15
gMVP		0.28

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1452792292; hg19: chrX-110951301;