NM_001110792.2:c.746dupG
Variant summary
Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1_StrongPM2PP5_Very_Strong
The NM_001110792.2(MECP2):c.746dupG(p.Gly250TrpfsTer21) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★).
Frequency
Consequence
NM_001110792.2 frameshift
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 rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
MECP2 | NM_001110792.2 | c.746dupG | p.Gly250TrpfsTer21 | frameshift_variant | Exon 3 of 3 | ENST00000453960.7 | NP_001104262.1 | |
MECP2 | NM_004992.4 | c.710dupG | p.Gly238TrpfsTer21 | frameshift_variant | Exon 4 of 4 | ENST00000303391.11 | NP_004983.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
MECP2 | ENST00000453960.7 | c.746dupG | p.Gly250TrpfsTer21 | frameshift_variant | Exon 3 of 3 | 1 | NM_001110792.2 | ENSP00000395535.2 | ||
MECP2 | ENST00000303391.11 | c.710dupG | p.Gly238TrpfsTer21 | frameshift_variant | Exon 4 of 4 | 1 | NM_004992.4 | ENSP00000301948.6 |
Frequencies
GnomAD3 genomes Cov.: 23
GnomAD4 exome Cov.: 36
GnomAD4 genome Cov.: 23
ClinVar
Submissions by phenotype
Rett syndrome Pathogenic:4
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Psychomotor arrest; Microcephaly; Partial epilepsy; Spasticity; Scoliosis; Hypercholesterolemia; Characteristic hand movements -
This variant has been collected from RettBASE and curated to current modified ACMG/AMP criteria. Based on the classification scheme defined by the ClinGen Rett/Angelman-like Expert Panel for Rett/AS-like Disorders Specifications to the ACMG/AMP Variant Interpretation Guidelines VCEP 3.0, this variant is classified as pathogenic. At least the following criteria are met: Predicted to result in loss of function, and LOF is a known mechanism of disease (PVS1). This variant is absent from gnomAD (PM2_Supporting). Has been observed in at least 2 individuals with phenotypes consistent with MECP2-related disease (PS4_Supporting). (PMID 11462237‚Äö 17986102‚ÄöClinVar Variation ID: 143666) -
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Severe neonatal-onset encephalopathy with microcephaly Pathogenic:1
This sequence change creates a premature translational stop signal (p.Gly238Trpfs*21) in the MECP2 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 249 amino acid(s) of the MECP2 protein. This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individuals with Rett syndrome (PMID: 11462237, 17986102). ClinVar contains an entry for this variant (Variation ID: 143666). This variant disrupts a region of the MECP2 protein in which other variant(s) (p.Glu455Aspfsx*32, p.Asn470*) have been determined to be pathogenic (PMID: 10814718, 23696494). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -
not provided Pathogenic:1
Frameshift variant predicted to result in protein truncation in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 23262346, 11462237, 30405208, 21831886, 17986102, 11402105, 28947817) -
Autism, susceptibility to, X-linked 3 Pathogenic:1
A Heterozygous Frameshift variant c.710dupG in Exon 4 of the MECP2 gene that results in the amino acid substitution p.Gly238fs*21 was identified. The observed variant is novel in gnomAD exomes and genomes, respectively. The severity of the impact of this variant on the protein is high, based on the effect of the protein and REVEL score . Rare Exome Variant Ensemble Learner (REVEL) is an ensembl method for predicting the pathogenicity of missense variants based on a combination of scores from 13 individual tools: MutPred, FATHMM v2.3, VEST 3.0, PolyPhen-2, SIFT, PROVEAN, MutationAssessor, MutationTaster, LRT, GERP++, SiPhy, phyloP, and phastCons. The REVEL score for an individual missense variant can range from 0 to 1, with higher scores reflecting greater likelihood that the variant is disease-causing. ClinVar has also classified this variant as Pathogenic (Variant ID: 143666). The observed variant has previously been reported in the patient affected with Rett syndrome (Hoffbuhr K et al 2001). Based on the above evidence this variant has been classified as Likely Pathogenic according to the ACMG guidelines. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at