NM_001080.3:c.1163C>A

Variant names:

• chr6-24522915-C-A
• rs536355368
• NM_001080.3:c.1163C>A

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM1 PM2 PP2 PP3_Moderate

The NM_001080.3(ALDH5A1):​c.1163C>A​(p.Ala388Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A388V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 30)
• Consequence: ALDH5A1 NM_001080.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.56
• Publications: 0 publications found

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]

ALDH5A1 Gene-Disease associations (from GenCC):

• succinic semialdehyde dehydrogenase deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_001080.3
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 55 curated pathogenic missense variants (we use a threshold of 10). The gene has 13 curated benign missense variants. Gene score misZ: 0.73405 (below the threshold of 3.09). Trascript score misZ: 0.28023 (below the threshold of 3.09). GenCC associations: The gene is linked to succinic semialdehyde dehydrogenase deficiency.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.866

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001080.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALDH5A1	NM_001080.3	MANE Select	c.1163C>A	p.Ala388Glu	missense	Exon 7 of 10	NP_001071.1
	ALDH5A1	NM_170740.1		c.1202C>A	p.Ala401Glu	missense	Exon 8 of 11	NP_733936.1
	ALDH5A1	NM_001368954.1		c.1019C>A	p.Ala340Glu	missense	Exon 6 of 9	NP_001355883.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALDH5A1	ENST00000357578.8	TSL:1 MANE Select	c.1163C>A	p.Ala388Glu	missense	Exon 7 of 10	ENSP00000350191.3
	ALDH5A1	ENST00000348925.2	TSL:1	c.1202C>A	p.Ala401Glu	missense	Exon 8 of 11	ENSP00000314649.3
	ALDH5A1	ENST00000859838.1		c.1145C>A	p.Ala382Glu	missense	Exon 8 of 11	ENSP00000529897.1

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 30

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Succinate-semialdehyde dehydrogenase deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.56
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.29
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.65	D
Eigen	Pathogenic	0.72
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Uncertain	0.15	D
MetaRNN	Pathogenic	0.87	D
MetaSVM	Uncertain	0.33	D
MutationAssessor	Benign	2.0	M
PhyloP100		7.6
PrimateAI	Uncertain	0.60	T
PROVEAN	Pathogenic	-4.8	D
REVEL	Pathogenic	0.80
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.94
MutPred		0.64		Gain of disorder (P = 0.043)
MVP		0.96
MPC		1.0
ClinPred		1.0	D
GERP RS		5.2
Varity_R		0.98
gMVP		0.96
Mutation Taster		=15/85	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs536355368; hg19: chr6-24523143;