4-99342956-C-T

Variant names:

• chr4-99342956-C-T
• NM_000669.5:c.667G>A

Variant summary

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

The NM_000669.5(ADH1C):​c.667G>A​(p.Val223Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: ADH1C NM_000669.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.97

Genes affected

ADH1C (HGNC:251): (alcohol dehydrogenase 1C (class I), gamma polypeptide) This gene encodes class I alcohol dehydrogenase, gamma subunit, which is a member of the alcohol dehydrogenase family. Members of this enzyme family metabolize a wide variety of substrates, including ethanol, retinol, other aliphatic alcohols, hydroxysteroids, and lipid peroxidation products. Class I alcohol dehydrogenase, consisting of several homo- and heterodimers of alpha, beta, and gamma subunits, exhibits high activity for ethanol oxidation to acetaldehyde, thus playing a major role in ethanol catabolism. Three genes encoding alpha, beta and gamma subunits are tandemly organized in a genomic segment as a gene cluster. An association between ADH1C polymorphism and alcohol dependence has not been established. [provided by RefSeq, Sep 2019]

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=0.4064101).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ADH1C	NM_000669.5	c.667G>A	p.Val223Met	missense_variant	Exon 6 of 9	ENST00000515683.6	NP_000660.1
ADH1C	NR_133005.2	n.738G>A		non_coding_transcript_exon_variant	Exon 6 of 9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ADH1C	ENST00000515683.6	c.667G>A	p.Val223Met	missense_variant	Exon 6 of 9	1	NM_000669.5	ENSP00000426083.1
ADH1C	ENST00000510055.5	c.547G>A	p.Val183Met	missense_variant	Exon 7 of 7	3		ENSP00000478439.1
ADH1C	ENST00000511397.3	c.*55G>A		downstream_gene_variant		3		ENSP00000478545.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jan 21, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.667G>A (p.V223M) alteration is located in exon 6 (coding exon 6) of the ADH1C gene. This alteration results from a G to A substitution at nucleotide position 667, causing the valine (V) at amino acid position 223 to be replaced by a methionine (M). 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	0.46
BayesDel_addAF	Uncertain	0.090	D
BayesDel_noAF	Benign	-0.11
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.036	T;T
FATHMM_MKL	Benign	0.59	D
LIST_S2	Benign	0.84	T;T
MetaRNN	Benign	0.41	T;T
MutationAssessor	Uncertain	2.8	M;.
PrimateAI	Benign	0.44	T
Sift4G	Pathogenic	0.0	D;.
Polyphen		1.0	D;.
Vest4		0.64
MVP		0.20
GERP RS		2.3
Varity_R		0.40
gMVP		0.66

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr4-100264113;