rs1055012664
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Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3
The NM_001080.3(ALDH5A1):c.1439G>A(p.Arg480Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000031 in 1,614,062 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 (★★).
Frequency
Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0000027 ( 0 hom. )
Consequence
ALDH5A1
NM_001080.3 missense
NM_001080.3 missense
Scores
7
6
6
Clinical Significance
Conservation
PhyloP100: 9.29
Genes affected
ALDH5A1 (HGNC:408): (aldehyde dehydrogenase 5 family member A1) This protein belongs to the aldehyde dehydrogenase family of proteins. This gene encodes a mitochondrial NAD(+)-dependent succinic semialdehyde dehydrogenase. A deficiency of this enzyme, known as 4-hydroxybutyricaciduria, is a rare inborn error in the metabolism of the neurotransmitter 4-aminobutyric acid (GABA). In response to the defect, physiologic fluids from patients accumulate GHB, a compound with numerous neuromodulatory properties. Two transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 3 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.821
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
ALDH5A1 | NM_001080.3 | c.1439G>A | p.Arg480Lys | missense_variant | 10/10 | ENST00000357578.8 | |
ALDH5A1 | NM_170740.1 | c.1478G>A | p.Arg493Lys | missense_variant | 11/11 | ||
ALDH5A1 | NM_001368954.1 | c.1295G>A | p.Arg432Lys | missense_variant | 9/9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
ALDH5A1 | ENST00000357578.8 | c.1439G>A | p.Arg480Lys | missense_variant | 10/10 | 1 | NM_001080.3 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152178Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251478Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135912
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GnomAD4 exome AF: 0.00000274 AC: 4AN: 1461884Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3AN XY: 727244
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GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152178Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74350
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Succinate-semialdehyde dehydrogenase deficiency Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Oct 13, 2022 | This sequence change replaces arginine, which is basic and polar, with lysine, which is basic and polar, at codon 480 of the ALDH5A1 protein (p.Arg480Lys). This variant is present in population databases (no rsID available, gnomAD no frequency). This variant has not been reported in the literature in individuals affected with ALDH5A1-related conditions. ClinVar contains an entry for this variant (Variation ID: 529477). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt ALDH5A1 protein function. 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. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 13, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Inborn genetic diseases Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Oct 10, 2023 | The c.1439G>A (p.R480K) alteration is located in exon 10 (coding exon 10) of the ALDH5A1 gene. This alteration results from a G to A substitution at nucleotide position 1439, causing the arginine (R) at amino acid position 480 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Uncertain
DANN
Uncertain
DEOGEN2
Uncertain
D;T;.
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Pathogenic
D;D;D
M_CAP
Benign
D
MetaRNN
Pathogenic
D;D;D
MetaSVM
Uncertain
T
MutationAssessor
Benign
L;.;.
MutationTaster
Benign
D;D;D;D
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D;D;D
REVEL
Uncertain
Sift
Benign
D;D;D
Sift4G
Benign
T;T;T
Polyphen
D;.;.
Vest4
MutPred
Gain of methylation at R480 (P = 0.0077);.;.;
MVP
MPC
0.95
ClinPred
D
GERP RS
Varity_R
gMVP
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