19-49460822-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_153329.4(ALDH16A1):c.500G>A(p.Gly167Glu) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000434 in 1,613,028 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: ALDH16A1 NM_153329.4 missense, splice_region
• Scores: Splicing: ADA: 0.9981
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.87

Genes affected

ALDH16A1 (HGNC:28114): (aldehyde dehydrogenase 16 family member A1) This gene encodes a member of the aldehyde dehydrogenase superfamily. The family members act on aldehyde substrates and use nicotinamide adenine dinucleotide phosphate (NADP) as a cofactor. This gene is conserved in chimpanzee, dog, cow, mouse, rat, and zebrafish. The protein encoded by this gene interacts with maspardin, a protein that when truncated is responsible for Mast syndrome. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2010]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.988

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ALDH16A1	NM_153329.4	c.500G>A	p.Gly167Glu	missense_variant, splice_region_variant	5/17	ENST00000293350.9
ALDH16A1	NM_001145396.2	c.500G>A	p.Gly167Glu	missense_variant, splice_region_variant	5/16
ALDH16A1	XM_011526441.1	c.413G>A	p.Gly138Glu	missense_variant, splice_region_variant	5/17
ALDH16A1	XM_047438163.1	c.413G>A	p.Gly138Glu	missense_variant, splice_region_variant	6/18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ALDH16A1	ENST00000293350.9	c.500G>A	p.Gly167Glu	missense_variant, splice_region_variant	5/17	1	NM_153329.4	P1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151936 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250510 Hom.: 0 AF XY: 0.00000737 AC XY: 1 AN XY: 135622

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000411 AC: 6 AN: 1461092 Hom.: 0 Cov.: 31 AF XY: 0.00000825 AC XY: 6 AN XY: 726850

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000450

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151936 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 74186

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 20, 2021

The c.500G>A (p.G167E) alteration is located in exon 5 (coding exon 5) of the ALDH16A1 gene. This alteration results from a G to A substitution at nucleotide position 500, causing the glycine (G) at amino acid position 167 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.48
BayesDel_addAF	Pathogenic	0.38	D
BayesDel_noAF	Pathogenic	0.41
Cadd	Pathogenic	34
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.69	D;T;.
Eigen	Pathogenic	0.82
Eigen_PC	Pathogenic	0.72
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.82	T;T;T
M_CAP	Benign	0.041	D
MetaRNN	Pathogenic	0.99	D;D;D
MetaSVM	Pathogenic	0.97	D
MutationAssessor	Pathogenic	4.2	H;.;H
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.61	T
PROVEAN	Pathogenic	-7.5	D;D;D
REVEL	Pathogenic	0.87
Sift	Pathogenic	0.0	D;D;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.96
MutPred		0.98		Loss of sheet (P = 0.0817);.;Loss of sheet (P = 0.0817);
MVP		0.99
MPC		0.48
ClinPred		1.0	D
GERP RS		5.4
Varity_R		0.98
gMVP		0.93

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.83
SpliceAI score (max)		0.16		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: rs1260152495; hg19: chr19-49964079;