3-184242883-C-T
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Variant summary
Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBS1_SupportingBS2
The NM_005787.6(ALG3):c.1084G>A(p.Val362Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0014 in 1,613,810 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.00079 ( 0 hom., cov: 33)
Exomes 𝑓: 0.0015 ( 3 hom. )
Consequence
ALG3
NM_005787.6 missense
NM_005787.6 missense
Scores
2
7
10
Clinical Significance
Conservation
PhyloP100: 7.73
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]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -9 ACMG points.
BP4
Computational evidence support a benign effect (MetaRNN=0.020545602).
BS1
Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.000795 (121/152284) while in subpopulation EAS AF= 0.00559 (29/5190). AF 95% confidence interval is 0.004. There are 0 homozygotes in gnomad4. There are 53 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
BS2
High Homozygotes in GnomAdExome4 at 3 AR gene
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
ALG3 | NM_005787.6 | c.1084G>A | p.Val362Ile | missense_variant | 8/9 | ENST00000397676.8 | |
ALG3 | NM_001006941.2 | c.940G>A | p.Val314Ile | missense_variant | 8/9 | ||
ALG3 | NR_024533.1 | n.1015G>A | non_coding_transcript_exon_variant | 7/8 | |||
ALG3 | NR_024534.1 | n.1078G>A | non_coding_transcript_exon_variant | 8/9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
ALG3 | ENST00000397676.8 | c.1084G>A | p.Val362Ile | missense_variant | 8/9 | 1 | NM_005787.6 | P1 |
Frequencies
GnomAD3 genomes AF: 0.000795 AC: 121AN: 152166Hom.: 0 Cov.: 33
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GnomAD3 exomes AF: 0.00121 AC: 300AN: 248924Hom.: 0 AF XY: 0.00115 AC XY: 155AN XY: 135082
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GnomAD4 exome AF: 0.00147 AC: 2142AN: 1461526Hom.: 3 Cov.: 32 AF XY: 0.00144 AC XY: 1050AN XY: 727038
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GnomAD4 genome AF: 0.000795 AC: 121AN: 152284Hom.: 0 Cov.: 33 AF XY: 0.000712 AC XY: 53AN XY: 74450
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:5Benign:1
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
not provided Uncertain:3
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | May 13, 2019 | In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; Has not been previously published in a patient, as pathogenic or benign, to our knowledge; This variant is associated with the following publications: (PMID: 30061496) - |
Uncertain significance, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Mar 01, 2018 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics | May 08, 2017 | - - |
ALG3-congenital disorder of glycosylation Uncertain:2Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Invitae | Jan 08, 2024 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 13, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Baylor Genetics | Jan 18, 2018 | This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Uncertain
CADD
Uncertain
DANN
Uncertain
DEOGEN2
Benign
T;.;.
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Pathogenic
D
LIST_S2
Pathogenic
D;D;D
M_CAP
Benign
D
MetaRNN
Benign
T;T;T
MetaSVM
Uncertain
D
MutationAssessor
Benign
L;.;.
MutationTaster
Benign
D;D;D;D;D
PrimateAI
Uncertain
T
PROVEAN
Benign
N;N;N
REVEL
Uncertain
Sift
Benign
T;T;T
Sift4G
Benign
T;T;T
Polyphen
D;.;P
Vest4
MVP
MPC
ClinPred
T
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at