rs1283990436

Variant names:

• chr6-24495290-CCGCGCCGCCGTG-C
• rs1283990436
• NM_001080.3:c.300_311delCGCCGTGCGCGC

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM1 PM4

The NM_001080.3(ALDH5A1):​c.300_311delCGCCGTGCGCGC​(p.Ala101_Ala104del) variant causes a disruptive inframe deletion change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type DEL_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. A100A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ALDH5A1 NM_001080.3 disruptive_inframe_deletion
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.19
• 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]

GPLD1 (HGNC:4459): (glycosylphosphatidylinositol specific phospholipase D1) Many proteins are tethered to the extracellular face of eukaryotic plasma membranes by a glycosylphosphatidylinositol (GPI) anchor. The GPI-anchor is a glycolipid found on many blood cells. The protein encoded by this gene is a GPI degrading enzyme. Glycosylphosphatidylinositol specific phospholipase D1 hydrolyzes the inositol phosphate linkage in proteins anchored by phosphatidylinositol glycans, thereby releasing the attached protein from the plasma membrane. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 14 uncertain in NM_001080.3
• PM4: Nonframeshift variant in NON repetitive region in NM_001080.3.

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.300_311delCGCCGTGCGCGC	p.Ala101_Ala104del	disruptive_inframe_deletion	Exon 1 of 10	NP_001071.1
	ALDH5A1	NM_170740.1		c.300_311delCGCCGTGCGCGC	p.Ala101_Ala104del	disruptive_inframe_deletion	Exon 1 of 11	NP_733936.1
	ALDH5A1	NM_001368954.1		c.300_311delCGCCGTGCGCGC	p.Ala101_Ala104del	disruptive_inframe_deletion	Exon 1 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.300_311delCGCCGTGCGCGC	p.Ala101_Ala104del	disruptive_inframe_deletion	Exon 1 of 10	ENSP00000350191.3
	ALDH5A1	ENST00000348925.2	TSL:1	c.300_311delCGCCGTGCGCGC	p.Ala101_Ala104del	disruptive_inframe_deletion	Exon 1 of 11	ENSP00000314649.3
	ALDH5A1	ENST00000491546.5	TSL:5	c.300_311delCGCCGTGCGCGC	p.Ala101_Ala104del	disruptive_inframe_deletion	Exon 1 of 9	ENSP00000417687.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

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
PhyloP100		6.2
Mutation Taster		=34/166	disease causing

Splicing

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

Other links and lift over

dbSNP: rs1283990436; hg19: chr6-24495518;