22-42126627-A-G

Variant names:

• chr22-42126627-A-G
• rs1135838
• NM_000106.6:c.1441T>C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000106.6(CYP2D6):​c.1441T>C​(p.Phe481Leu) 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. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as drug response (no stars).

• Frequency: Genomes: not found (cov: 30)
• Consequence: CYP2D6 NM_000106.6 missense
• Clinical Significance: drug response no assertion criteria provided O:1
• Conservation: PhyloP100: 0.0930

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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.15571842).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYP2D6	NM_000106.6	c.1441T>C	p.Phe481Leu	missense_variant	Exon 9 of 9	ENST00000645361.2	NP_000097.3
CYP2D6	NM_001025161.3	c.1288T>C	p.Phe430Leu	missense_variant	Exon 8 of 8		NP_001020332.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYP2D6	ENST00000645361.2	c.1441T>C	p.Phe481Leu	missense_variant	Exon 9 of 9		NM_000106.6	ENSP00000496150.1

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 39

GnomAD4 genome Cov.: 30

ClinVar

Significance: drug response

Submissions summary: Other:1

Revision: no assertion criteria provided

Submissions by phenotype

Tramadol response Other:1

Apr 28, 2018

Bruce Budowle Laboratory, University of North Texas Health Science Center

Significance: drug response

Review Status: no assertion criteria provided

Collection Method: research

- T:M1 = postmortem ratio or tramadol to O-desmethyltramadol; t-MP = model-based clustered metabolizer phenotype inferred from T:M1

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.73
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.40
CADD	Benign	14
DANN	Benign	0.73
DEOGEN2	Benign	0.019	T;T;T;T;.
Eigen	Benign	-0.98
Eigen_PC	Benign	-0.99
FATHMM_MKL	Benign	0.12	N
LIST_S2	Benign	0.47	.;.;T;T;T
M_CAP	Benign	0.039	D
MetaRNN	Benign	0.16	T;T;T;T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	1.1	L;L;L;.;.
PrimateAI	Uncertain	0.49	T
PROVEAN	Uncertain	-3.9	.;.;D;.;D
REVEL	Benign	0.026
Sift	Benign	0.40	.;.;T;.;T
Sift4G	Benign	0.29	.;.;T;T;T
Vest4		0.12, 0.17, 0.14
MutPred		0.33		Loss of catalytic residue at F481 (P = 0.0407);Loss of catalytic residue at F481 (P = 0.0407);Loss of catalytic residue at F481 (P = 0.0407);.;.;
MVP		0.65
MPC		0.13
ClinPred		0.072	T
GERP RS		1.1
Varity_R		0.18
gMVP		0.56

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: rs1135838; hg19: chr22-42522629;