rs1245567722

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4BS2

The NM_001099922.3(ALG13):​c.10G>A​(p.Val4Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000496 in 1,210,761 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 5 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. V4V) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 24)
Exomes 𝑓: 0.0000046 ( 0 hom. 5 hem. )

Consequence

ALG13
NM_001099922.3 missense

Scores

1
11
5

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.79

Publications

2 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 Gene-Disease associations (from GenCC):
  • genetic developmental and epileptic encephalopathy
    Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
  • developmental and epileptic encephalopathy, 36
    Inheritance: XL Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
  • non-syndromic X-linked intellectual disability
    Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4
Computational evidence support a benign effect (MetaRNN=0.33951697).
BS2
High Hemizygotes in GnomAdExome4 at 5 XL gene

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
ALG13NM_001099922.3 linkc.10G>A p.Val4Met missense_variant Exon 1 of 27 ENST00000394780.8 NP_001093392.1 Q9NP73-1

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
ALG13ENST00000394780.8 linkc.10G>A p.Val4Met missense_variant Exon 1 of 27 2 NM_001099922.3 ENSP00000378260.3 Q9NP73-1

Frequencies

GnomAD3 genomes
AF:
0.00000886
AC:
1
AN:
112850
Hom.:
0
Cov.:
24
show subpopulations
Gnomad AFR
AF:
0.0000321
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:
0.00
Gnomad OTH
AF:
0.00
GnomAD2 exomes
AF:
0.00000546
AC:
1
AN:
183082
AF XY:
0.0000148
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:
0.0000122
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.00000455
AC:
5
AN:
1097911
Hom.:
0
Cov.:
30
AF XY:
0.0000138
AC XY:
5
AN XY:
363277
show subpopulations
African (AFR)
AF:
0.00
AC:
0
AN:
26397
American (AMR)
AF:
0.00
AC:
0
AN:
35197
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
19383
East Asian (EAS)
AF:
0.00
AC:
0
AN:
30189
South Asian (SAS)
AF:
0.00
AC:
0
AN:
54126
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
40513
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
4135
European-Non Finnish (NFE)
AF:
0.00000594
AC:
5
AN:
841886
Other (OTH)
AF:
0.00
AC:
0
AN:
46085

Age Distribution

Exome Hom
Variant carriers
0
2
4
6
8
10
<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:
0.00000886
AC:
1
AN:
112850
Hom.:
0
Cov.:
24
AF XY:
0.00
AC XY:
0
AN XY:
35022
show subpopulations
African (AFR)
AF:
0.0000321
AC:
1
AN:
31143
American (AMR)
AF:
0.00
AC:
0
AN:
10791
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
2659
East Asian (EAS)
AF:
0.00
AC:
0
AN:
3542
South Asian (SAS)
AF:
0.00
AC:
0
AN:
2735
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
6258
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
238
European-Non Finnish (NFE)
AF:
0.00
AC:
0
AN:
53273
Other (OTH)
AF:
0.00
AC:
0
AN:
1523
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.525
Heterozygous variant carriers
0
0
1
1
2
2
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance
Alfa
AF:
0.00
Hom.:
0
Bravo
AF:
0.00000378
EpiCase
AF:
0.0000545
EpiControl
AF:
0.00

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
Aug 15, 2022
Labcorp Genetics (formerly Invitae), Labcorp
Significance:Uncertain significance
Review Status:criteria provided, single submitter
Collection Method:clinical testing

This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 4 of the ALG13 protein (p.Val4Met). This variant is present in population databases (no rsID available, gnomAD 0.001%), including at least one homozygous and/or hemizygous individual. This variant has not been reported in the literature in individuals affected with ALG13-related conditions. ClinVar contains an entry for this variant (Variation ID: 1041615). 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: "Benign"; 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
Uncertain
0.39
BayesDel_addAF
Uncertain
0.019
T
BayesDel_noAF
Benign
-0.21
CADD
Benign
19
DANN
Uncertain
1.0
DEOGEN2
Benign
0.41
.;T;T;.
FATHMM_MKL
Uncertain
0.97
D
LIST_S2
Uncertain
0.96
D;D;D;D
M_CAP
Uncertain
0.15
D
MetaRNN
Benign
0.34
T;T;T;T
MetaSVM
Uncertain
-0.036
T
MutationAssessor
Pathogenic
3.2
M;M;.;.
PhyloP100
1.8
PrimateAI
Uncertain
0.53
T
PROVEAN
Benign
-2.1
N;N;.;.
REVEL
Uncertain
0.48
Sift
Uncertain
0.020
D;D;.;.
Sift4G
Uncertain
0.0030
D;D;D;D
Polyphen
0.54
P;P;.;.
Vest4
0.56
MutPred
0.48
Gain of disorder (P = 0.0701);Gain of disorder (P = 0.0701);Gain of disorder (P = 0.0701);Gain of disorder (P = 0.0701);
MVP
0.88
MPC
0.22
ClinPred
0.57
D
GERP RS
-0.0065
PromoterAI
-0.11
Neutral
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.7
Varity_R
0.31
gMVP
0.36
Mutation Taster
=90/10
polymorphism

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
Details are displayed if max score is > 0.2

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

Publications

Other links and lift over

dbSNP: rs1245567722; hg19: chrX-110924456; API