chr22-42129819-G-C

Position:

• chr22-42129819-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_000106.6(CYP2D6):​c.271C>G​(p.Leu91Val) 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 pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L91M) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 30)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CYP2D6 NM_000106.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.482

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]

CYP2D6 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.905

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYP2D6	NM_000106.6	c.271C>G	p.Leu91Val	missense_variant	2/9	ENST00000645361.2	NP_000097.3
CYP2D6	NM_001025161.3	c.271C>G	p.Leu91Val	missense_variant	2/8		NP_001020332.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYP2D6	ENST00000645361.2	c.271C>G	p.Leu91Val	missense_variant	2/9		NM_000106.6	ENSP00000496150.1

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1452202 Hom.: 0 Cov.: 37 AF XY: 0.00 AC XY: 0 AN XY: 722574

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 30

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Uncertain	0.025	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.033	T;T;T;T;.
Eigen	Benign	-0.13
Eigen_PC	Benign	-0.33
FATHMM_MKL	Benign	0.56	D
LIST_S2	Benign	0.78	.;.;T;T;D
M_CAP	Benign	0.073	D
MetaRNN	Pathogenic	0.90	D;D;D;D;D
MetaSVM	Uncertain	0.50	D
MutationAssessor	Pathogenic	3.6	H;H;H;.;H
PrimateAI	Uncertain	0.57	T
PROVEAN	Uncertain	-2.7	.;.;D;.;D
REVEL	Uncertain	0.54
Sift	Uncertain	0.0030	.;.;D;.;D
Sift4G	Uncertain	0.0060	.;.;D;D;D
Vest4		0.52, 0.55, 0.56
MutPred		0.86		Loss of stability (P = 0.0176);Loss of stability (P = 0.0176);Loss of stability (P = 0.0176);.;Loss of stability (P = 0.0176);
MVP		0.56
MPC		0.53
ClinPred		0.99	D
GERP RS		2.4
Varity_R		0.12
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: chr22-42525821;