5-126568334-G-C

Variant names:

• chr5-126568334-G-C
• rs1270423610
• NM_001182.5:c.796C>G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP2

The NM_001182.5(ALDH7A1):​c.796C>G​(p.Arg266Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. R266Q) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ALDH7A1 NM_001182.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 4.11
• Publications: 0 publications found

Genes affected

ALDH7A1 (HGNC:877): (aldehyde dehydrogenase 7 family member A1) The protein encoded by this gene is a member of subfamily 7 in the aldehyde dehydrogenase gene family. These enzymes are thought to play a major role in the detoxification of aldehydes generated by alcohol metabolism and lipid peroxidation. This particular member has homology to a previously described protein from the green garden pea, the 26g pea turgor protein. It is also involved in lysine catabolism that is known to occur in the mitochondrial matrix. Recent reports show that this protein is found both in the cytosol and the mitochondria, and the two forms likely arise from the use of alternative translation initiation sites. An additional variant encoding a different isoform has also been found for this gene. Mutations in this gene are associated with pyridoxine-dependent epilepsy. Several related pseudogenes have also been identified. [provided by RefSeq, Jan 2011]

ALDH7A1 Gene-Disease associations (from GenCC):

• pyridoxine-dependent epilepsy

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, Illumina, ClinGen
• pyridoxine-dependent epilepsy caused by ALDH7A1 mutant

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• 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 56 curated pathogenic missense variants (we use a threshold of 10). The gene has 13 curated benign missense variants. Gene score misZ: 0.36846 (below the threshold of 3.09). Trascript score misZ: 0.93117 (below the threshold of 3.09). GenCC associations: The gene is linked to pyridoxine-dependent epilepsy caused by ALDH7A1 mutant, pyridoxine-dependent epilepsy.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001182.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALDH7A1	NM_001182.5	MANE Select	c.796C>G	p.Arg266Gly	missense	Exon 9 of 18	NP_001173.2	P49419-1
	ALDH7A1	NM_001201377.2		c.712C>G	p.Arg238Gly	missense	Exon 9 of 18	NP_001188306.1	P49419-2
	ALDH7A1	NM_001202404.2		c.796C>G	p.Arg266Gly	missense	Exon 9 of 16	NP_001189333.2	P49419-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALDH7A1	ENST00000409134.8	TSL:1 MANE Select	c.796C>G	p.Arg266Gly	missense	Exon 9 of 18	ENSP00000387123.3	P49419-1
	ALDH7A1	ENST00000636879.1	TSL:5	c.841C>G	p.Arg281Gly	missense	Exon 10 of 19	ENSP00000490811.1	A0A1B0GW77
	ALDH7A1	ENST00000939100.1		c.796C>G	p.Arg266Gly	missense	Exon 9 of 19	ENSP00000609159.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)
-	1	-	Pyridoxine-dependent epilepsy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.23
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.14	T
Eigen	Uncertain	0.47
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.10	D
MetaRNN	Uncertain	0.73	D
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Benign	1.9	L
PhyloP100		4.1
PrimateAI	Benign	0.44	T
PROVEAN	Pathogenic	-6.0	D
REVEL	Uncertain	0.61
Sift	Uncertain	0.019	D
Sift4G	Benign	0.069	T
Polyphen		0.95	P
Vest4		0.70
MutPred		0.52		Loss of solvent accessibility (P = 0.0509)
MVP		0.87
MPC		0.49
ClinPred		0.99	D
GERP RS		4.3
Varity_R		0.72
gMVP		0.72
Mutation Taster		=15/85	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1270423610; hg19: chr5-125904026;