3-183015492-G-GT
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Variant summary
Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PVS1_ModeratePM2PP5
The NM_020166.5(MCCC1):c.2123dupA(p.His708fs) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: not found (cov: 32)
Consequence
MCCC1
NM_020166.5 frameshift
NM_020166.5 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 6.11
Genes affected
MCCC1 (HGNC:6936): (methylcrotonyl-CoA carboxylase subunit 1) This gene encodes the large subunit of 3-methylcrotonyl-CoA carboxylase. This enzyme functions as a heterodimer and catalyzes the carboxylation of 3-methylcrotonyl-CoA to form 3-methylglutaconyl-CoA. Mutations in this gene are associated with 3-Methylcrotonylglycinuria, an autosomal recessive disorder of leucine catabolism. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 5 ACMG points.
PVS1
Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0253 CDS is truncated, and there are 0 pathogenic variants in the truncated region.
PM2
Very rare variant in population databases, with high coverage;
PP5
Variant 3-183015492-G-GT is Pathogenic according to our data. Variant chr3-183015492-G-GT is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 654061.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=1, Likely_pathogenic=1}.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
MCCC1 | NM_020166.5 | c.2123dupA | p.His708fs | frameshift_variant | 19/19 | ENST00000265594.9 | NP_064551.3 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
MCCC1 | ENST00000265594.9 | c.2123dupA | p.His708fs | frameshift_variant | 19/19 | 1 | NM_020166.5 | ENSP00000265594.4 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
Alfa
AF:
Hom.:
Bravo
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Pathogenic:1Uncertain:1
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
3-methylcrotonyl-CoA carboxylase 1 deficiency Pathogenic:1Uncertain:1
Likely pathogenic, criteria provided, single submitter | clinical testing | Baylor Genetics | Jan 16, 2024 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Oct 01, 2018 | In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Experimental studies and prediction algorithms are not available for this variant, and the functional significance of the affected amino acid(s) is currently unknown. This variant has been observed in combination with another MCCC1 variant in an individual affected with 3-methylcrotonyl-CoA carboxylase deficiency (PMID: 22642865). This variant is not present in population databases (ExAC no frequency). This sequence change results in a premature translational stop signal in the MCCC1 gene (p.His708Glnfs*8). While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 18 amino acids of the MCCC1 protein. - |
Computational scores
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Calibrated prediction
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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