rs28934274
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PS1_ModeratePM1PM2PP3_StrongPP5_Very_Strong
The ENST00000307363.10(GLB1):c.367G>A(p.Gly123Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000752 in 1,461,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 12/19 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another nucleotide change resulting in same amino acid change has been previously reported as Likely pathogenicin UniProt.
Frequency
Consequence
ENST00000307363.10 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 18 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
GLB1 | NM_000404.4 | c.367G>A | p.Gly123Arg | missense_variant | 3/16 | ENST00000307363.10 | NP_000395.3 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
GLB1 | ENST00000307363.10 | c.367G>A | p.Gly123Arg | missense_variant | 3/16 | 1 | NM_000404.4 | ENSP00000306920 | P2 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 exomes AF: 0.00000802 AC: 2AN: 249506Hom.: 0 AF XY: 0.0000148 AC XY: 2AN XY: 135360
GnomAD4 exome AF: 0.00000752 AC: 11AN: 1461836Hom.: 0 Cov.: 32 AF XY: 0.00000688 AC XY: 5AN XY: 727220
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
Mucopolysaccharidosis, MPS-IV-B Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Oct 22, 2024 | Variant summary: GLB1 c.367G>A (p.Gly123Arg) results in a non-conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 8e-06 in 249506 control chromosomes. c.367G>A has been reported in the literature in individuals affected with Mucopolysaccharidosis Type IVB (Morquio Syndrome B) (examples: Caciotti_2007, Yoshida_1991, Sohn_2012, Lee_2014). These data indicate that the variant is likely to be associated with disease. In vitro functional studies reduced activity for the variant (Yoshida_1991). The following publications have been ascertained in the context of this evaluation (PMID: 17221873, 1907800, 22371915, 25326637). ClinVar contains an entry for this variant (Variation ID: 928). Based on the evidence outlined above, the variant was classified as pathogenic. - |
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Dec 13, 2022 | Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 25364648, 1907800, 32071837, Cho2021[Review], 30665703, 33240792, 31367523, 22371915, 25936995, 30548430, 17221873) - |
GM1 gangliosidosis;C0086652:Mucopolysaccharidosis, MPS-IV-B Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Dec 09, 2023 | This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 123 of the GLB1 protein (p.Gly123Arg). This variant is present in population databases (rs28934274, gnomAD 0.003%). This missense change has been observed in individual(s) with GLB1-related conditions (PMID: 1907800, 17221873, 22371915, 25936995). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 928). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt GLB1 protein function with a positive predictive value of 95%. Experimental studies have shown that this missense change affects GLB1 function (PMID: 1907800). For these reasons, this variant has been classified as Pathogenic. - |
Infantile GM1 gangliosidosis Pathogenic:1
Pathogenic, no assertion criteria provided | literature only | OMIM | Aug 01, 1991 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at