rs183032531

Positions:

• chrX-111757653-A-G

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_001099922.3(ALG13):​c.3039A>G​(p.Val1013=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000635 in 1,207,045 control chromosomes in the GnomAD database, including 5 homozygotes. There are 208 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0037 (3 hom., 117 hem., cov: 22)
  • Exomes 𝑓: 0.00032 (2 hom. 91 hem.)
• Consequence: ALG13 NM_001099922.3 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7
• Conservation: PhyloP100: -0.0330

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 Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.77).
• BP6: Variant X-111757653-A-G is Benign according to our data. Variant chrX-111757653-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 383513.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chrX-111757653-A-G is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=-0.033 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0037 (410/110938) while in subpopulation AFR AF= 0.0128 (391/30526). AF 95% confidence interval is 0.0118. There are 3 homozygotes in gnomad4. There are 117 alleles in male gnomad4 subpopulation. Median coverage is 22. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 3 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ALG13	NM_001099922.3	c.3039A>G	p.Val1013=	synonymous_variant	26/27	ENST00000394780.8	NP_001093392.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ALG13	ENST00000394780.8	c.3039A>G	p.Val1013=	synonymous_variant	26/27	2	NM_001099922.3	ENSP00000378260	A2

Frequencies

GnomAD3 genomes AF: 0.00362 AC: 401 AN: 110888 Hom.: 3 Cov.: 22 AF XY: 0.00332 AC XY: 110 AN XY: 33112

Gnomad AFR AF: 0.0125

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000777

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000384

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000943

Gnomad OTH AF: 0.00336

GnomAD3 exomes AF: 0.000953 AC: 169 AN: 177262 Hom.: 1 AF XY: 0.000598 AC XY: 39 AN XY: 65254

Gnomad AFR exome AF: 0.0131

Gnomad AMR exome AF: 0.000295

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000128

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000325 AC: 356 AN: 1096107 Hom.: 2 Cov.: 30 AF XY: 0.000252 AC XY: 91 AN XY: 361697

Gnomad4 AFR exome AF: 0.0113

Gnomad4 AMR exome AF: 0.000370

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: 0.00000952

Gnomad4 OTH exome AF: 0.000782

GnomAD4 genome AF: 0.00370 AC: 410 AN: 110938 Hom.: 3 Cov.: 22 AF XY: 0.00353 AC XY: 117 AN XY: 33172

Gnomad4 AFR AF: 0.0128

Gnomad4 AMR AF: 0.000776

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000385

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000943

Gnomad4 OTH AF: 0.00332

Alfa AF: 0.00143 Hom.: 8

Bravo AF: 0.00390

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Developmental and epileptic encephalopathy, 36 Benign:3

Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Dec 05, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 30, 2021	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 30, 2024	- -

not specified Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 30, 2016	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jun 28, 2017	- -

Inborn genetic diseases Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 21, 2017

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

ALG13-related disorder Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jan 02, 2020

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.77
CADD	Benign	1.9
DANN	Benign	0.74

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs183032531; hg19: chrX-111000881;