chr2-26215149-G-A
Variant summary
Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2PP3_ModeratePP5_Very_Strong
The NM_000182.5(HADHA):c.703C>T(p.Arg235Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,458,690 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 Likely pathogenic (★★).
Frequency
Consequence
NM_000182.5 missense
Scores
Clinical Significance
Conservation
Genome browser will be placed here
ACMG classification
Verdict is Pathogenic. Variant got 12 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD4 exome AF: 0.00000274 AC: 4AN: 1458690Hom.: 0 Cov.: 30 AF XY: 0.00000276 AC XY: 2AN XY: 725872
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
Long chain 3-hydroxyacyl-CoA dehydrogenase deficiency Pathogenic:3
- -
- -
- -
not provided Pathogenic:2
- -
The R235W variant in the HADHA gene has been reported previously in the homozygous state in three unrelated individuals with MTP deficiency (Scheuerman et al., 2009; Boutron et al., 2011). The R235W variant was not observed in approximately 6500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The R235W variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is conserved across species, and in silico analysis predicts this variant is probably damaging to the protein structure/function. The R235W variant is a strong candidate for a pathogenic variant, however the possibility it may be a rare benign variant cannot be excluded. -
Long chain 3-hydroxyacyl-CoA dehydrogenase deficiency;CN376812:Mitochondrial trifunctional protein deficiency 1 Pathogenic:1
- -
Mitochondrial trifunctional protein deficiency 1 Pathogenic:1
- -
Mitochondrial trifunctional protein deficiency;C3711645:Long chain 3-hydroxyacyl-CoA dehydrogenase deficiency Pathogenic:1
This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 235 of the HADHA protein (p.Arg235Trp). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with mitochondrial trifunctional protein deficiency (PMID: 19433283, 21549624, 34878152). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 188987). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on HADHA protein function. For these reasons, this variant has been classified as Pathogenic. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at