Variant rs4997557 details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_000762.6(CYP2A6):c.881C>T(p.Thr294Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,460,250 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/19 in silico tools predict a benign 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. T294S) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

CYP2A6
NM_000762.6 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.205

Variant links:

Genes affected

CYP2A6 (HGNC:2610): (cytochrome P450 family 2 subfamily A member 6) This gene, CYP2A6, 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 its expression is induced by phenobarbital. The enzyme is known to hydroxylate coumarin, and also metabolizes nicotine, aflatoxin B1, nitrosamines, and some pharmaceuticals. Individuals with certain allelic variants are said to have a poor metabolizer phenotype, meaning they do not efficiently metabolize coumarin or nicotine. This gene is part of a large cluster of cytochrome P450 genes from the CYP2A, CYP2B and CYP2F subfamilies on chromosome 19q. The gene was formerly referred to as CYP2A3; however, it has been renamed CYP2A6. [provided by RefSeq, Jul 2008]

CYP2A6 links:

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ACMG classification

Classification made for transcript

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=0.380653).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYP2A6	NM_000762.6 linkuse as main transcript	c.881C>T	p.Thr294Ile	missense_variant	6/9	ENST00000301141.10	NP_000753.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
CYP2A6	ENST00000301141.10 linkuse as main transcript	c.881C>T	p.Thr294Ile	missense_variant	6/9	1	NM_000762.6	ENSP00000301141	P1
CYP2A6	ENST00000596719.5 linkuse as main transcript	n.732C>T		non_coding_transcript_exon_variant	5/6	1
CYP2A6	ENST00000600495.1 linkuse as main transcript	c.*693C>T		3_prime_UTR_variant, NMD_transcript_variant	6/6	1		ENSP00000472905

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1460250

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726442

show subpopulations

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:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.50

BayesDel_addAF

Benign

-0.060

BayesDel_noAF

Benign

-0.32

CADD

Benign

DANN

Uncertain

0.98

Eigen

Benign

-0.70

Eigen_PC

Benign

-0.87

FATHMM_MKL

Benign

0.31

LIST_S2

Benign

0.71

M_CAP

Benign

0.035

MetaRNN

Benign

0.38

MetaSVM

Benign

-0.72

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.66

PROVEAN

Pathogenic

-4.7

REVEL

Benign

0.29

Sift

Uncertain

0.0080

Sift4G

Uncertain

0.016

Vest4

0.44

MutPred

0.52

Loss of ubiquitination at K289 (P = 0.1423);

MVP

0.72

MPC

0.47

ClinPred

0.98

GERP RS

1.3

gMVP

0.33

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

LitVar

Other links and lift over