rs780277809

Variant names:

Variant summary

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

The NM_144988.4(ALG14):c.179C>G(p.Ser60Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000477 in 1,613,454 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000042 ( 0 hom. )

Consequence

ALG14
NM_144988.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:6

Conservation

PhyloP100: 8.49

Variant links:

Genes affected

ALG14 (HGNC:28287): (ALG14 UDP-N-acetylglucosaminyltransferase subunit) This gene is a member of the glycosyltransferase 1 family. The encoded protein and ALG13 are thought to be subunits of UDP-GlcNAc transferase, which catalyzes the first two committed steps in endoplasmic reticulum N-linked glycosylation. Mutations in this gene have been linked to congenital myasthenic syndrome (CMSWTA). Alternatively spliced transcript variants have been identified. [provided by RefSeq, Mar 2015]

ALG14 links:

ALG14-AS1 (HGNC:):

ALG14-AS1 links:

ALG14-AS1 (HGNC:41192): (ALG14 antisense RNA 1)

ALG14-AS1 links:

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ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
ALG14	NM_144988.4 link	c.179C>G	p.Ser60Cys	missense_variant	Exon 2 of 4	ENST00000370205.6	NP_659425.1	Q96F25

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ALG14	ENST00000370205.6 link	c.179C>G	p.Ser60Cys	missense_variant	Exon 2 of 4	1	NM_144988.4	ENSP00000359224.4	Q96F25
ALG14-AS1	ENST00000451611.1 link	n.595-2069G>C		intron_variant	Intron 1 of 1	1
ALG14	ENST00000495856.1 link	n.155C>G		non_coding_transcript_exon_variant	Exon 2 of 4	3

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152000

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000721

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000771

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.0000877

AC:

AN:

250862

Hom.:

AF XY:

0.0000664

AC XY:

AN XY:

135566

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000926

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000417

AC:

AN:

1461336

Hom.:

Cov.:

AF XY:

0.0000358

AC XY:

AN XY:

726934

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000706

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.000464

GnomAD4 genome

AF:

0.000105

AC:

AN:

152118

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74354

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000720

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000773

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000474

Bravo

AF:

0.0000756

ExAC

AF:

0.0000824

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.0000548

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Congenital myasthenic syndrome 15

Uncertain:2

Jul 15, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces serine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 60 of the ALG14 protein (p.Ser60Cys). This variant is present in population databases (rs780277809, gnomAD 0.09%). This variant has not been reported in the literature in individuals affected with ALG14-related conditions. ClinVar contains an entry for this variant (Variation ID: 390702). 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: "Probably Damaging"; 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. -

Apr 11, 2023

Genome-Nilou Lab

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases

Uncertain:1

Jun 07, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.179C>G (p.S60C) alteration is located in exon 2 (coding exon 2) of the ALG14 gene. This alteration results from a C to G substitution at nucleotide position 179, causing the serine (S) at amino acid position 60 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Nov 15, 2016

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The S60C variant in the ALG14 gene has not been reported previously as a pathogenic variant, nor asa benign variant, to our knowledge. The S60C variant was not observed in approximately 6500individuals of European and African American ancestry in the NHLBI Exome Sequencing Project,indicating it is not a common benign variant in these populations. The S60C variant is anon-conservative amino acid substitution, which is likely to impact secondary protein structure asthese residues differ in polarity, charge, size and/or other properties. This substitution occurs at aposition that is conserved in mammals and in silico analysis predicts this variant is probably damagingto the protein structure/function. A missense variant in nearby residue (P65L) has been reported in the Human Gene Mutation Database in association with congenital myasthenic syndrome (Stenson et al.,2014), supporting the functional importance of this region of the protein. We interpret S60C as avariant of uncertain significance. -

Intellectual developmental disorder with epilepsy, behavioral abnormalities, and coarse facies

Uncertain:1

Apr 11, 2023

Genome-Nilou Lab

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Myopathy, epilepsy, and progressive cerebral atrophy

Uncertain:1

Apr 11, 2023

Genome-Nilou Lab

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Uncertain

-0.080

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.66

Eigen

Uncertain

0.64

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.74

M_CAP

Uncertain

0.15

MetaRNN

Uncertain

0.60

MetaSVM

Uncertain

0.037

MutationAssessor

Pathogenic

3.2

PrimateAI

Benign

0.47

PROVEAN

Uncertain

-3.6

REVEL

Uncertain

0.59

Sift

Uncertain

0.0070

Sift4G

Uncertain

0.023

Polyphen

1.0

Vest4

0.63

MutPred

0.59

Loss of disorder (P = 0.0275);

MVP

0.96

MPC

1.1

ClinPred

0.49

GERP RS

5.8

Varity_R

0.65

gMVP

0.73

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over