16-8781348-T-G
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3
The NM_020686.6(ABAT):āc.1421T>Gā(p.Phe474Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,878 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 Uncertain significance (ā ).
Frequency
Consequence
NM_020686.6 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 3 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251478Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135912
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461878Hom.: 0 Cov.: 33 AF XY: 0.00000413 AC XY: 3AN XY: 727240
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
Gamma-aminobutyric acid transaminase deficiency Uncertain:1
This sequence change replaces phenylalanine with cysteine at codon 474 of the ABAT protein (p.Phe474Cys). The phenylalanine residue is moderately conserved and there is a large physicochemical difference between phenylalanine and cysteine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with ABAT-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). 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. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at