3-184242588-C-T

Position:

chr3-184242588-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_005787.6(ALG3):c.1243G>A(p.Val415Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000574 in 1,604,084 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000056 ( 0 hom. )

Consequence

ALG3
NM_005787.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 0.771

Variant links:

Genes affected

ALG3 (HGNC:23056): (ALG3 alpha-1,3- mannosyltransferase) This gene encodes a member of the ALG3 family. The encoded protein catalyses the addition of the first dol-P-Man derived mannose in an alpha 1,3 linkage to Man5GlcNAc2-PP-Dol. Defects in this gene have been associated with congenital disorder of glycosylation type Id (CDG-Id) characterized by abnormal N-glycosylation. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2008]

ALG3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03368613).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
ALG3	NM_005787.6 linkuse as main transcript	c.1243G>A	p.Val415Ile	missense_variant	9/9	ENST00000397676.8
ALG3	NM_001006941.2 linkuse as main transcript	c.1099G>A	p.Val367Ile	missense_variant	9/9
ALG3	NR_024533.1 linkuse as main transcript	n.1174G>A		non_coding_transcript_exon_variant	8/8
ALG3	NR_024534.1 linkuse as main transcript	n.1237G>A		non_coding_transcript_exon_variant	9/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ALG3	ENST00000397676.8 linkuse as main transcript	c.1243G>A	p.Val415Ile	missense_variant	9/9	1	NM_005787.6	P1	Q92685-1

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000665

AC:

AN:

240646

Hom.:

AF XY:

0.0000536

AC XY:

AN XY:

130564

show subpopulations

Gnomad AFR exome

AF:

0.000195

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000112

Gnomad SAS exome

AF:

0.000172

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000555

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000558

AC:

AN:

1451916

Hom.:

Cov.:

AF XY:

0.0000597

AC XY:

AN XY:

720774

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000506

Gnomad4 SAS exome

AF:

0.000153

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000570

Gnomad4 OTH exome

AF:

0.0000334

GnomAD4 genome

AF:

0.0000723

AC:

AN:

152168

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74332

show subpopulations

Gnomad4 AFR

AF:

0.0000965

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000874

Hom.:

Bravo

AF:

0.0000793

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000119

AC:

ExAC

AF:

0.0000661

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 06, 2024

The c.1243G>A (p.V415I) alteration is located in exon 9 (coding exon 9) of the ALG3 gene. This alteration results from a G to A substitution at nucleotide position 1243, causing the valine (V) at amino acid position 415 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

ALG3-congenital disorder of glycosylation

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 11, 2022

This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 415 of the ALG3 protein (p.Val415Ile). This variant is present in population databases (rs375976807, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with ALG3-related conditions. ClinVar contains an entry for this variant (Variation ID: 962232). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The isoleucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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

Benign

0.075

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.36

CADD

Benign

DANN

Benign

0.81

DEOGEN2

Benign

0.077

T;.;.

Eigen

Benign

-0.65

Eigen_PC

Benign

-0.48

FATHMM_MKL

Benign

0.43

LIST_S2

Benign

0.83

T;T;T

M_CAP

Benign

0.029

MetaRNN

Benign

0.034

T;T;T

MetaSVM

Benign

-0.60

MutationAssessor

Benign

0.55

N;.;.

MutationTaster

Benign

0.52

D;D;D;D;D

PrimateAI

Benign

0.30

PROVEAN

Benign

0.17

N;N;N

REVEL

Benign

0.16

Sift

Benign

0.91

T;T;T

Sift4G

Benign

1.0

T;T;T

Polyphen

0.0010

B;.;B

Vest4

0.045

MVP

0.72

MPC

0.069

ClinPred

0.032

GERP RS

4.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.014

gMVP

0.083

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