chr5-126542453-C-T

Position:

• chr5-126542453-C-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_001182.5(ALDH7A1):​c.*2512G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00799 in 152,170 control chromosomes in the GnomAD database, including 18 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0080 (18 hom., cov: 32)
  • Exomes 𝑓: 0.0088 (0 hom.)
• Consequence: ALDH7A1 NM_001182.5 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.470

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]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BP6: Variant 5-126542453-C-T is Benign according to our data. Variant chr5-126542453-C-T is described in ClinVar as [Benign]. Clinvar id is 350530.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAdExome4 highest subpopulation (AFR) allele frequency = 0.25 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ALDH7A1	NM_001182.5	c.*2512G>A		3_prime_UTR_variant	18/18	ENST00000409134.8
ALDH7A1	NM_001201377.2	c.*2512G>A		3_prime_UTR_variant	18/18
ALDH7A1	NM_001202404.2	c.*2512G>A		3_prime_UTR_variant	16/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ALDH7A1	ENST00000409134.8	c.*2512G>A		3_prime_UTR_variant	18/18	1	NM_001182.5	P4
ALDH7A1	ENST00000635851.1	c.1564-1465G>A		intron_variant		5
ALDH7A1	ENST00000637782.1	c.1565+3871G>A		intron_variant		5

Frequencies

GnomAD3 genomes AF: 0.00801 AC: 1217 AN: 151938 Hom.: 18 Cov.: 32

Gnomad AFR AF: 0.0278

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00282

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000208

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000118

Gnomad OTH AF: 0.00866

GnomAD4 exome AF: 0.00877 AC: 1 AN: 114 Hom.: 0 Cov.: 0 AF XY: 0.0111 AC XY: 1 AN XY: 90

Gnomad4 AFR exome AF: 0.250

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00799 AC: 1215 AN: 152056 Hom.: 18 Cov.: 32 AF XY: 0.00786 AC XY: 584 AN XY: 74326

Gnomad4 AFR AF: 0.0276

Gnomad4 AMR AF: 0.00282

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000208

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000118

Gnomad4 OTH AF: 0.00857

Alfa AF: 0.00673 Hom.: 0

Bravo AF: 0.00951

Asia WGS AF: 0.00202 AC: 7 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Pyridoxine-dependent epilepsy Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	1.4
DANN	Benign	0.38

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

LitVar

Other links and lift over

dbSNP: rs76363408; hg19: chr5-125878145;