chr22-42126734-C-T

Position:

• chr22-42126734-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 6P and 4B. PM2 PP3_Strong BS2

The NM_000106.6(CYP2D6):​c.1334G>A​(p.Gly445Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000355 in 1,406,608 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000036 (0 hom.)
• Consequence: CYP2D6 NM_000106.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.79

Genes affected

CYP2D6 (HGNC:2625): (cytochrome P450 family 2 subfamily D member 6) This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and is known to metabolize as many as 25% of commonly prescribed drugs. Its substrates include antidepressants, antipsychotics, analgesics and antitussives, beta adrenergic blocking agents, antiarrythmics and antiemetics. The gene is highly polymorphic in the human population; certain alleles result in the poor metabolizer phenotype, characterized by a decreased ability to metabolize the enzyme's substrates. Some individuals with the poor metabolizer phenotype have no functional protein since they carry 2 null alleles whereas in other individuals the gene is absent. This gene can vary in copy number and individuals with the ultrarapid metabolizer phenotype can have 3 or more active copies of the gene. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2014]

NDUFA6-DT (HGNC:45273): (NDUFA6 divergent transcript)

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.995
• BS2: High AC in GnomAdExome4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYP2D6	NM_000106.6	c.1334G>A	p.Gly445Glu	missense_variant	9/9	ENST00000645361.2	NP_000097.3
CYP2D6	NM_001025161.3	c.1181G>A	p.Gly394Glu	missense_variant	8/8		NP_001020332.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYP2D6	ENST00000645361.2	c.1334G>A	p.Gly445Glu	missense_variant	9/9		NM_000106.6	ENSP00000496150.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000355 AC: 5 AN: 1406608 Hom.: 0 Cov.: 39 AF XY: 0.00000576 AC XY: 4 AN XY: 694778

Gnomad4 AFR exome AF: 0.0000937

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000125

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.23e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.92
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.59
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	T;T;T;T;.
Eigen	Pathogenic	0.98
Eigen_PC	Pathogenic	0.86
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.99	.;.;D;D;D
M_CAP	Pathogenic	0.74	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	4.3	H;H;H;.;.
PrimateAI	Uncertain	0.60	T
PROVEAN	Pathogenic	-7.3	.;.;D;.;D
REVEL	Pathogenic	0.99
Sift	Pathogenic	0.0	.;.;D;.;D
Sift4G	Pathogenic	0.0	.;.;D;D;D
Vest4		0.94, 0.93
MutPred		0.95		Loss of methylation at R450 (P = 0.0715);Loss of methylation at R450 (P = 0.0715);Loss of methylation at R450 (P = 0.0715);.;.;
MVP		0.96
MPC		0.62
ClinPred		1.0	D
GERP RS		4.8
Varity_R		0.86
gMVP		0.90

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: rs267608318; hg19: chr22-42522736;