dbSNP rs759472632: ALG13:p.Ala142Ala (chrX-111708069-T-C) – ACMG Classification: Benign (-17 pts)

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_StrongBP6_Very_StrongBP7BS2

The NM_001099922.3(ALG13):c.426T>C(p.Ala142Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000124 in 1,208,966 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 6 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 0.0000089 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.000013 ( 0 hom. 6 hem. )

Consequence

ALG13
NM_001099922.3 synonymous

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 1.26

Publications

0 publications found

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:

ALG13-AS1 (HGNC:41277): (ALG13 antisense RNA 1)

ALG13-AS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -17 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.47).

BP6

Variant X-111708069-T-C is Benign according to our data. Variant chrX-111708069-T-C is described in ClinVar as Likely_benign. ClinVar VariationId is 515513.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=1.26 with no splicing effect.

BS2

High Hemizygotes in GnomAdExome4 at 6 XL gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001099922.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
ALG13	NM_001099922.3	MANE Select	c.426T>C	p.Ala142Ala	synonymous	Exon 4 of 27	NP_001093392.1
ALG13	NM_001257231.2		c.192T>C	p.Ala64Ala	synonymous	Exon 4 of 27	NP_001244160.1
ALG13	NM_001324292.2		c.426T>C	p.Ala142Ala	synonymous	Exon 4 of 26	NP_001311221.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
ALG13	ENST00000394780.8	TSL:2 MANE Select	c.426T>C	p.Ala142Ala	synonymous	Exon 4 of 27	ENSP00000378260.3
ALG13	ENST00000623622.2	TSL:5	c.426T>C	p.Ala142Ala	synonymous	Exon 4 of 24	ENSP00000485624.2
ALG13	ENST00000436609.5	TSL:5	c.114T>C	p.Ala38Ala	synonymous	Exon 4 of 26	ENSP00000392990.2

Frequencies

GnomAD3 genomes

AF:

0.00000895

AC:

AN:

111748

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000113

AC:

AN:

176421

AF XY:

0.00

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:

0.0000257

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000128

AC:

AN:

1097218

Hom.:

Cov.:

AF XY:

0.0000165

AC XY:

AN XY:

362702

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26392

American (AMR)

AF:

0.00

AC:

AN:

35149

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19357

East Asian (EAS)

AF:

0.00

AC:

AN:

30190

South Asian (SAS)

AF:

0.00

AC:

AN:

53970

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40373

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4134

European-Non Finnish (NFE)

AF:

0.0000143

AC:

AN:

841607

Other (OTH)

AF:

0.0000434

AC:

AN:

46046

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000895

AC:

AN:

111748

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33916

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

30743

American (AMR)

AF:

0.00

AC:

AN:

10505

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2647

East Asian (EAS)

AF:

0.00

AC:

AN:

3548

South Asian (SAS)

AF:

0.00

AC:

AN:

2669

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6043

Middle Eastern (MID)

AF:

0.00

AC:

AN:

238

European-Non Finnish (NFE)

AF:

0.0000188

AC:

AN:

53181

Other (OTH)

AF:

0.00

AC:

AN:

1487

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000151

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Feb 21, 2018

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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.

Developmental and epileptic encephalopathy, 36

Benign:1

Sep 10, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not provided

Benign:1

Aug 01, 2020

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_noAF

Benign

-0.47

CADD

Benign

(source)

DANN

Benign

0.81

PhyloP100

1.3

Splicing

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

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over