rs144081869
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1PM2PM5PP3_StrongPP5_Very_Strong
The NM_005609.4(PYGM):c.2056G>A(p.Gly686Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000328 in 1,614,252 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 13/20 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G686E) has been classified as Likely pathogenic.
Frequency
Consequence
NM_005609.4 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 | UniProt |
---|---|---|---|---|---|---|---|
PYGM | NM_005609.4 | c.2056G>A | p.Gly686Arg | missense_variant | 17/20 | ENST00000164139.4 | |
PYGM | NM_001164716.1 | c.1792G>A | p.Gly598Arg | missense_variant | 15/18 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
PYGM | ENST00000164139.4 | c.2056G>A | p.Gly686Arg | missense_variant | 17/20 | 1 | NM_005609.4 | P1 | |
PYGM | ENST00000377432.7 | c.1792G>A | p.Gly598Arg | missense_variant | 15/18 | 2 |
Frequencies
GnomAD3 genomes ? AF: 0.0000591 AC: 9AN: 152246Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000477 AC: 12AN: 251480Hom.: 0 AF XY: 0.0000589 AC XY: 8AN XY: 135916
GnomAD4 exome AF: 0.0000294 AC: 43AN: 1461888Hom.: 0 Cov.: 32 AF XY: 0.0000289 AC XY: 21AN XY: 727242
GnomAD4 genome ? AF: 0.0000656 AC: 10AN: 152364Hom.: 0 Cov.: 32 AF XY: 0.0000671 AC XY: 5AN XY: 74506
ClinVar
Submissions by phenotype
Glycogen storage disease, type V Pathogenic:4
Pathogenic, no assertion criteria provided | literature only | OMIM | Mar 01, 1998 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Jan 09, 2024 | This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 686 of the PYGM protein (p.Gly686Arg). This variant is present in population databases (rs144081869, gnomAD 0.009%). This missense change has been observed in individual(s) with glycogen storage disease type V (PMID: 9506549, 17404776). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. This variant is also known as p.Gly685Arg. ClinVar contains an entry for this variant (Variation ID: 2306). 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 PYGM protein function with a positive predictive value of 95%. For these reasons, this variant has been classified as Pathogenic. - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Counsyl | May 05, 2017 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Baylor Genetics | Oct 31, 2023 | - - |
not provided Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Jun 01, 2017 | - - |
Likely pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Sep 23, 2023 | 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: 30560358, 9506549, 17404776, 25740218, 17217859, 29350794, 31179311, 32075227, 27303362, 34534370, 37091313) - |
Tip-toe gait Pathogenic:1
Likely pathogenic, no assertion criteria provided | clinical testing | Practice for Gait Abnormalities, David Pomarino, Competency Network Toe Walking c/o Practice Pomarino | Apr 07, 2021 | - - |
PYGM-related condition Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | Mar 16, 2023 | The PYGM c.2056G>A variant is predicted to result in the amino acid substitution p.Gly686Arg. This variant has been reported in the compound heterozygous state with a second causative PYGM variant in several patients with histochemically or biochemically confirmed GSD V (Vorgerd et al. 1998. PubMed ID: 9506549, referred to as p.Gly685Arg; Deschauer et al. 2007. PubMed ID: 17404776). An additional patient was identified via use of the non-ischemic forearm exercise test, and was then found to be compound heterozygous for the c.2056G>A and c.148C>T (described above) variants (Hogrel et al. 2015. PubMed ID: 25740218). We have also observed this variant at PreventionGenetics, in the homozygous or compound heterozygous state, in two patients with suspected GSD V (internal data). This variant is reported in 0.0093% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/11-64517969-C-T). This variant is interpreted as pathogenic. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at