rs1060499755

Variant names:

• chr5-126577158-T-C
• rs1060499755
• NM_001182.5:c.571A>G

Your query was ambiguous. Multiple possible variants found:

• chr5-126577158-T-C
• chr5-126577158-T-A

Variant summary

Our verdict is Pathogenic. The variant received 15 ACMG points: 15P and 0B. PM1 PM2 PP2 PP3_Moderate PP5_Very_Strong

The NM_001182.5(ALDH7A1):​c.571A>G​(p.Ile191Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,894 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 (★★). Synonymous variant affecting the same amino acid position (i.e. I191I) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ALDH7A1 NM_001182.5 missense
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 7.74
• Publications: 2 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: Pathogenic. The variant received 15 ACMG points.

• PM1: In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 6 uncertain in NM_001182.5
• 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.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.85
• PP5: Variant 5-126577158-T-C is Pathogenic according to our data. Variant chr5-126577158-T-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 402176.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

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.571A>G	p.Ile191Val	missense	Exon 6 of 18	NP_001173.2	P49419-1
	ALDH7A1	NM_001201377.2		c.487A>G	p.Ile163Val	missense	Exon 6 of 18	NP_001188306.1	P49419-2
	ALDH7A1	NM_001202404.2		c.571A>G	p.Ile191Val	missense	Exon 6 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.571A>G	p.Ile191Val	missense	Exon 6 of 18	ENSP00000387123.3	P49419-1
	ALDH7A1	ENST00000636879.1	TSL:5	c.616A>G	p.Ile206Val	missense	Exon 7 of 19	ENSP00000490811.1	A0A1B0GW77
	ALDH7A1	ENST00000939100.1		c.571A>G	p.Ile191Val	missense	Exon 6 of 19	ENSP00000609159.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461894 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727248

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.000173 AC: 1 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112012

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions

Significance: Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
1	-	-	Abnormal brain morphology (1)
1	-	-	Pyridoxine-dependent epilepsy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.070
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.076	T
Eigen	Pathogenic	0.74
Eigen_PC	Pathogenic	0.66
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Uncertain	0.10	D
MetaRNN	Pathogenic	0.85	D
MetaSVM	Uncertain	0.60	D
MutationAssessor	Uncertain	2.9	M
PhyloP100		7.7
PrimateAI	Uncertain	0.68	T
PROVEAN	Benign	-0.98	N
REVEL	Pathogenic	0.72
Sift	Uncertain	0.014	D
Sift4G	Uncertain	0.034	D
Polyphen		1.0	D
Vest4		0.87
MutPred		0.73		Gain of catalytic residue at I191 (P = 0.2456)
MVP		0.93
MPC		0.57
ClinPred		0.95	D
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.70
gMVP		0.62
Mutation Taster		=2/98	disease causing (ClinVar)

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: rs1060499755; hg19: chr5-125912850;