4-99415601-T-C

Variant names:

• chr4-99415601-T-C
• rs1721499234
• NM_000673.7:c.977A>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000673.7(ADH7):​c.977A>G​(p.Asp326Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,460,948 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: ADH7 NM_000673.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.37

Genes affected

ADH7 (HGNC:256): (alcohol dehydrogenase 7 (class IV), mu or sigma polypeptide) This gene encodes class IV alcohol dehydrogenase 7 mu or sigma subunit, which is a member of the alcohol dehydrogenase family. Members of this family metabolize a wide variety of substrates, including ethanol, retinol, other aliphatic alcohols, hydroxysteroids, and lipid peroxidation products. The enzyme encoded by this gene is inefficient in ethanol oxidation, but is the most active as a retinol dehydrogenase; thus it may participate in the synthesis of retinoic acid, a hormone important for cellular differentiation. The expression of this gene is much more abundant in stomach than liver, thus differing from the other known gene family members. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.39513722).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ADH7	NM_000673.7	c.977A>G	p.Asp326Gly	missense_variant	Exon 8 of 9	ENST00000437033.7	NP_000664.3
ADH7	NM_001166504.2	c.1037A>G	p.Asp346Gly	missense_variant	Exon 8 of 9		NP_001159976.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ADH7	ENST00000437033.7	c.977A>G	p.Asp326Gly	missense_variant	Exon 8 of 9	1	NM_000673.7	ENSP00000414254.2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1460948 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726704

Gnomad4 AFR exome AF: 0.0000299

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 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

Bravo AF: 0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Dec 27, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1013A>G (p.D338G) alteration is located in exon 8 (coding exon 8) of the ADH7 gene. This alteration results from a A to G substitution at nucleotide position 1013, causing the aspartic acid (D) at amino acid position 338 to be replaced by a glycine (G). 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	0.35
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.40
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.18	T;T;.;.
Eigen	Uncertain	0.31
Eigen_PC	Benign	0.21
FATHMM_MKL	Benign	0.66	D
LIST_S2	Benign	0.76	T;T;T;T
M_CAP	Benign	0.0067	T
MetaRNN	Benign	0.40	T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Pathogenic	3.5	M;.;.;.
PrimateAI	Benign	0.34	T
PROVEAN	Pathogenic	-4.9	D;D;D;D
REVEL	Benign	0.12
Sift	Uncertain	0.0020	D;D;D;D
Sift4G	Uncertain	0.034	D;D;D;D
Polyphen		0.73	P;.;.;.
Vest4		0.44
MutPred		0.51		Loss of stability (P = 0.0195);.;.;.;
MVP		0.57
MPC		0.086
ClinPred		0.96	D
GERP RS		5.2
Varity_R		0.71
gMVP		0.59

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: rs1721499234; hg19: chr4-100336758;