5-126577176-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 3P and 3B. PM1PP2BP4_ModerateBP6

The NM_001182.5(ALDH7A1):c.553G>A(p.Val185Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000263 in 1,613,992 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V185L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00015 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00027 ( 0 hom. )

Consequence

ALDH7A1
NM_001182.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:1

Conservation

PhyloP100: 2.04

Publications

4 publications found

Variant links:

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: Illumina, Orphanet, ClinGen
pyridoxine-dependent epilepsy caused by ALDH7A1 mutant
Inheritance: AR, AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics

ALDH7A1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM1

In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_001182.5

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, pyridoxine-dependent epilepsy caused by ALDH7A1 mutant.

BP4

Computational evidence support a benign effect (MetaRNN=0.2534637).

BP6

Variant 5-126577176-C-T is Benign according to our data. Variant chr5-126577176-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 204830.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ALDH7A1	NM_001182.5 link	c.553G>A	p.Val185Ile	missense_variant	Exon 6 of 18	ENST00000409134.8	NP_001173.2	P49419-1
ALDH7A1	NM_001201377.2 link	c.469G>A	p.Val157Ile	missense_variant	Exon 6 of 18		NP_001188306.1	P49419-2
ALDH7A1	NM_001202404.2 link	c.553G>A	p.Val185Ile	missense_variant	Exon 6 of 16		NP_001189333.2	P49419-4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ALDH7A1	ENST00000409134.8 link	c.553G>A	p.Val185Ile	missense_variant	Exon 6 of 18	1	NM_001182.5	ENSP00000387123.3		P49419-1

Frequencies

GnomAD3 genomes

AF:

0.000151

AC:

AN:

152114

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000279

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000127

AC:

AN:

251430

AF XY:

0.000132

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000231

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000202

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000275

AC:

402

AN:

1461878

Hom.:

Cov.:

AF XY:

0.000279

AC XY:

203

AN XY:

727238

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33480

American (AMR)

AF:

0.000157

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000334

AC:

371

AN:

1112004

Other (OTH)

AF:

0.000364

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

115

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000151

AC:

AN:

152114

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

74288

show subpopulations

African (AFR)

AF:

0.0000966

AC:

AN:

41428

American (AMR)

AF:

0.00

AC:

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10586

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000279

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000175

Hom.:

Bravo

AF:

0.000212

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000988

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

May 13, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.553G>A (p.V185I) alteration is located in exon 6 (coding exon 6) of the ALDH7A1 gene. This alteration results from a G to A substitution at nucleotide position 553, causing the valine (V) at amino acid position 185 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Feb 21, 2025

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

ALDH7A1-related disorder

Uncertain:1

Jun 18, 2024

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

The ALDH7A1 c.553G>A variant is predicted to result in the amino acid substitution p.Val185Ile. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.023% of alleles in individuals of Latino descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Pyridoxine-dependent epilepsy

Benign:1

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.077

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.28

CADD

Benign

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.031

T;T;T;.;T;.;.;.;T;T;T;T

Eigen

Benign

-0.69

Eigen_PC

Benign

-0.61

FATHMM_MKL

Uncertain

0.79

LIST_S2

Benign

0.82

T;T;T;T;T;T;T;T;T;T;T;T

M_CAP

Benign

0.040

MetaRNN

Benign

0.25

T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.53

MutationAssessor

Benign

0.39

.;N;.;.;.;.;.;N;.;.;.;.

PhyloP100

2.0

PrimateAI

Benign

0.30

PROVEAN

Benign

0.71

.;N;.;.;.;.;.;N;.;.;N;.

REVEL

Benign

0.14

Sift

Benign

0.050

.;D;.;.;.;.;.;T;.;.;T;.

Sift4G

Benign

0.17

.;T;.;.;.;.;.;T;.;T;.;.

Polyphen

0.0010

.;B;.;.;.;.;.;.;.;.;.;.

Vest4

0.28, 0.26

MVP

0.83

MPC

0.12

ClinPred

0.050

GERP RS

0.62

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.069

gMVP

0.33

Mutation Taster

=89/11

polymorphism

(source)

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over