rs748597500
Variant summary
Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2PP3_StrongPP5_Very_Strong
The NM_080916.3(DGUOK):c.591G>A(p.Gln197=) variant causes a splice region, synonymous change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000128 in 1,614,004 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/2 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★★).
Frequency
Consequence
NM_080916.3 splice_region, synonymous
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 14 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
DGUOK | NM_080916.3 | c.591G>A | p.Gln197= | splice_region_variant, synonymous_variant | 4/7 | ENST00000264093.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
DGUOK | ENST00000264093.9 | c.591G>A | p.Gln197= | splice_region_variant, synonymous_variant | 4/7 | 1 | NM_080916.3 | P1 | |
DGUOK-AS1 | ENST00000667561.3 | n.308-2797C>T | intron_variant, non_coding_transcript_variant |
Frequencies
GnomAD3 genomes ? AF: 0.0000460 AC: 7AN: 152116Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000398 AC: 10AN: 251478Hom.: 0 AF XY: 0.0000294 AC XY: 4AN XY: 135912
GnomAD4 exome AF: 0.000136 AC: 199AN: 1461888Hom.: 0 Cov.: 32 AF XY: 0.000129 AC XY: 94AN XY: 727246
GnomAD4 genome ? AF: 0.0000460 AC: 7AN: 152116Hom.: 0 Cov.: 32 AF XY: 0.0000673 AC XY: 5AN XY: 74304
ClinVar
Submissions by phenotype
not provided Pathogenic:3
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Oct 29, 2022 | Variant affects the normal splice acceptor site in intron 4 and results in abnormal gene splicing by skipping exon 4 (Mousson et al., 2007); Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 29137425, 17073823, 34299348, 30665703, 32278775, 34099697, 34026460) - |
Pathogenic, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Apr 16, 2018 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Jan 31, 2024 | This sequence change affects codon 197 of the DGUOK mRNA. It is a 'silent' change, meaning that it does not change the encoded amino acid sequence of the DGUOK protein. RNA analysis indicates that this variant induces altered splicing and may result in an absent or disrupted protein product. This variant is present in population databases (rs748597500, gnomAD 0.01%). This variant has been observed in individual(s) with mitochondrial DNA depletion syndrome (PMID: 17073823, 17452231, 18205204). 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: 214286). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Studies have shown that this variant results in skipping of exon 4 and introduces a premature termination codon (PMID: 17073823). The resulting mRNA is expected to undergo nonsense-mediated decay. For these reasons, this variant has been classified as Pathogenic. - |
Mitochondrial DNA depletion syndrome 3 (hepatocerebral type) Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Baylor Genetics | Aug 14, 2023 | - - |
Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal recessive 4;C4310735:Portal hypertension, noncirrhotic;C5191055:Mitochondrial DNA depletion syndrome 3 (hepatocerebral type) Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Fulgent Genetics, Fulgent Genetics | Oct 31, 2018 | - - |
DGUOK-Related Disorders Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Sep 18, 2023 | Variant summary: DGUOK c.591G>A (p.Gln197Gln) alters a conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. Several computational tools predict a significant impact on normal splicing: Two predict the variant abolishes a canonical 5' splicing donor site, and two predict the variant weakens this site. At least one publication reports experimental evidence that this variant affects mRNA splicing, finding that it results in exon skipping (Mousson de Camaret_2007). The variant allele was found at a frequency of 4e-05 in 251478 control chromosomes (gnomAD). c.591G>A has been reported in the literature in individuals affected with DGUOK-Related Disorders (Mousson de Camaret_2007, Dimmock_2008, Sarzi_2007, Nesbitt), and some were reported as compound heterozygous with other pathogenic variants. These data indicate that the variant is likely to be associated with disease. The following publications have been ascertained in the context of this evaluation (PMID: 17073823, 18205204, 17452231, 24642831). Four submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. All submitters classified the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at