chr20-17969924-C-A
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Variant summary
Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PVS1_StrongPM2PP5_Moderate
The NM_052865.4(MGME1):c.65C>A(p.Ser22Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,768 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).
Frequency
Genomes: not found (cov: 33)
Exomes 𝑓: 6.8e-7 ( 0 hom. )
Consequence
MGME1
NM_052865.4 stop_gained
NM_052865.4 stop_gained
Scores
1
2
4
Clinical Significance
Conservation
PhyloP100: 0.570
Genes affected
MGME1 (HGNC:16205): (mitochondrial genome maintenance exonuclease 1) The protein encoded by this gene is a nuclear-encoded mitochondrial protein necessary for the maintenance of mitochondrial genome synthesis. The encoded protein is a RecB-type exonuclease and primarily cleaves single-stranded DNA. Defects in this gene have been associated with mitochondrial DNA depletion syndrome-11. Three transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2015]
OVOL2 (HGNC:15804): (ovo like zinc finger 2) This gene encodes a member of the evolutionarily conserved ovo-like protein family. Mammalian members of this family contain a single zinc finger domain composed of a tetrad of C2H2 zinc fingers with variable N- and C-terminal extensions that contain intrinsically disordered domains. Members of this family are involved in epithelial development and differentiation. Knockout of this gene in mouse results in early embryonic lethality with phenotypes that include neurectoderm expansion, impaired vascularization, and heart anomalies. In humans, allelic variants of this gene have been associated with posterior polymorphous corneal dystrophy. [provided by RefSeq, Apr 2016]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 8 ACMG points.
PVS1
Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 12 pathogenic variants in the truncated region.
PM2
Very rare variant in population databases, with high coverage;
PP5
Variant 20-17969924-C-A is Pathogenic according to our data. Variant chr20-17969924-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 2165318.Status of the report is criteria_provided_single_submitter, 1 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MGME1 | NM_052865.4 | c.65C>A | p.Ser22Ter | stop_gained | 2/5 | ENST00000377710.10 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MGME1 | ENST00000377710.10 | c.65C>A | p.Ser22Ter | stop_gained | 2/5 | 1 | NM_052865.4 | P1 | |
MGME1 | ENST00000377709.1 | c.65C>A | p.Ser22Ter | stop_gained | 2/5 | 2 | |||
MGME1 | ENST00000377704.4 | c.65C>A | p.Ser22Ter | stop_gained | 2/3 | 3 | |||
OVOL2 | ENST00000486776.5 | n.492-12887G>T | intron_variant, non_coding_transcript_variant | 3 |
Frequencies
GnomAD3 genomes Cov.: 33
GnomAD3 genomes
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33
GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461768Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1AN XY: 727174
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GnomAD4 genome Cov.: 33
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33
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ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Feb 06, 2023 | This sequence change creates a premature translational stop signal (p.Ser22*) in the MGME1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in MGME1 are known to be pathogenic (PMID: 23313956). This variant is present in population databases (rs761126029, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with MGME1-related conditions. For these reasons, this variant has been classified as Pathogenic. - |
Computational scores
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Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Uncertain
CADD
Pathogenic
DANN
Uncertain
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Benign
N
MutationTaster
Benign
A;A;A
Vest4
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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