rs1555453238
Variant summary
Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1PM2PM5PP3PP5
The NM_000303.3(PMM2):c.640G>A(p.Gly214Ser) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,458,594 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/2 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G214R) has been classified as Likely pathogenic.
Frequency
Consequence
NM_000303.3 missense, splice_region
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 8 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
PMM2 | NM_000303.3 | c.640G>A | p.Gly214Ser | missense_variant, splice_region_variant | 8/8 | ENST00000268261.9 | |
PMM2 | XM_047434215.1 | c.391G>A | p.Gly131Ser | missense_variant, splice_region_variant | 6/6 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
PMM2 | ENST00000268261.9 | c.640G>A | p.Gly214Ser | missense_variant, splice_region_variant | 8/8 | 1 | NM_000303.3 | P1 | |
ENST00000567942.1 | n.356C>T | non_coding_transcript_exon_variant | 2/2 | 3 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD4 exome AF: 0.00000274 AC: 4AN: 1458594Hom.: 0 Cov.: 30 AF XY: 0.00000413 AC XY: 3AN XY: 725814
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
PMM2-congenital disorder of glycosylation Pathogenic:3Uncertain:1
Pathogenic, criteria provided, single submitter | clinical testing | Mendelics | May 28, 2019 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Centre for Mendelian Genomics, University Medical Centre Ljubljana | Mar 30, 2020 | This variant was classified as: Pathogenic. The following ACMG criteria were applied in classifying this variant: PS1,PM1,PM2,PP2,PP3,PP5. - |
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Aug 10, 2023 | ClinVar contains an entry for this variant (Variation ID: 553503). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. This variant disrupts the p.Gly214 amino acid residue in PMM2. Other variant(s) that disrupt this residue have been observed in individuals with PMM2-related conditions (PMID: 30687093), which suggests that this may be a clinically significant amino acid residue. For these reasons, this variant has been classified as Pathogenic. This missense change has been observed in individual(s) with congenital disorder of glycosylation type 1a (PMID: 12357336, 25497157, 28807751). This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 214 of the PMM2 protein (p.Gly214Ser). This variant is not present in population databases (gnomAD no frequency). - |
Uncertain significance, criteria provided, single submitter | clinical testing | Counsyl | Aug 22, 2017 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at