rs28399499

Positions:

chr19-41012316-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_StrongBA1

The NM_000767.5(CYP2B6):c.983T>C(p.Ile328Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00364 in 1,614,058 control chromosomes in the GnomAD database, including 196 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as drug response (★★★). Another nucleotide change resulting in same amino acid change has been previously reported as Likely benignin UniProt.

Frequency

Genomes: 𝑓 0.020 ( 111 hom., cov: 32)

Exomes 𝑓: 0.0019 ( 85 hom. )

Consequence

CYP2B6
NM_000767.5 missense

Scores

Clinical Significance

drug response reviewed by expert panel B:1O:1

Conservation

PhyloP100: 7.60

Variant links:

Genes affected

CYP2B6 (HGNC:2615): (cytochrome P450 family 2 subfamily B member 6) This gene, CYP2B6, 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 metabolize some xenobiotics, such as the anti-cancer drugs cyclophosphamide and ifosphamide. Transcript variants for this gene have been described; however, it has not been resolved whether these transcripts are in fact produced by this gene or by a closely related pseudogene, CYP2B7. Both the gene and the pseudogene are located in the middle of a CYP2A pseudogene found in a large cluster of cytochrome P450 genes from the CYP2A, CYP2B and CYP2F subfamilies on chromosome 19q. [provided by RefSeq, Jul 2008]

CYP2B6 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0061822236).

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0682 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYP2B6	NM_000767.5 linkuse as main transcript	c.983T>C	p.Ile328Thr	missense_variant	7/9	ENST00000324071.10	NP_000758.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYP2B6	ENST00000324071.10 linkuse as main transcript	c.983T>C	p.Ile328Thr	missense_variant	7/9	1	NM_000767.5	ENSP00000324648	P1	P20813-1
CYP2B6	ENST00000597612.1 linkuse as main transcript	n.478T>C		non_coding_transcript_exon_variant	2/3	1
CYP2B6	ENST00000593831.1 linkuse as main transcript	c.275T>C	p.Ile92Thr	missense_variant	3/5	2		ENSP00000470582
CYP2B6	ENST00000598834.2 linkuse as main transcript	c.*424T>C		3_prime_UTR_variant, NMD_transcript_variant	8/10	5		ENSP00000496294

Frequencies

GnomAD3 genomes

AF:

0.0203

AC:

3085

AN:

152082

Hom.:

110

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0704

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00859

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000622

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.0129

GnomAD3 exomes

AF:

0.00508

AC:

1277

AN:

251302

Hom.:

AF XY:

0.00355

AC XY:

482

AN XY:

135840

show subpopulations

Gnomad AFR exome

AF:

0.0694

Gnomad AMR exome

AF:

0.00341

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000150

Gnomad OTH exome

AF:

0.00147

GnomAD4 exome

AF:

0.00191

AC:

2791

AN:

1461858

Hom.:

Cov.:

AF XY:

0.00165

AC XY:

1202

AN XY:

727236

show subpopulations

Gnomad4 AFR exome

AF:

0.0681

Gnomad4 AMR exome

AF:

0.00356

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000139

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000791

Gnomad4 OTH exome

AF:

0.00391

GnomAD4 genome

AF:

0.0203

AC:

3090

AN:

152200

Hom.:

111

Cov.:

AF XY:

0.0194

AC XY:

1447

AN XY:

74420

show subpopulations

Gnomad4 AFR

AF:

0.0703

Gnomad4 AMR

AF:

0.00858

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000622

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000132

Gnomad4 OTH

AF:

0.0128

Alfa

AF:

0.00420

Hom.:

Bravo

AF:

0.0229

ESP6500AA

AF:

0.0622

AC:

274

ESP6500EA

AF:

0.000581

AC:

ExAC

AF:

0.00646

AC:

784

Asia WGS

AF:

0.00375

AC:

AN:

3478

EpiCase

AF:

0.000327

EpiControl

AF:

0.000178

ClinVar

Significance: drug response

Submissions summary: Benign:1Other:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

CYP2B6-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 02, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

nevirapine response - Toxicity

Other:1

drug response, reviewed by expert panel

curation

PharmGKB

Mar 24, 2021

PharmGKB Level of Evidence 2A: Variants in Level 2A clinical annotations are found in PharmGKB’s Tier 1 Very Important Pharmacogenes (VIPs). These variants are in known pharmacogenes, implying causation of drug phenotype is more likely. These clinical annotations describe variant-drug combinations with a moderate level of evidence supporting the association. For example, the association may be found in multiple cohorts, but there may be a minority of studies that do not support the majority assertion. Level 2A clinical annotations must be supported by at least two independent publications. Drug-variant association: Toxicity

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.38

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.16

CADD

Pathogenic

DANN

Uncertain

0.98

DEOGEN2

Benign

0.092

T;T;T

Eigen

Pathogenic

0.73

Eigen_PC

Uncertain

0.58

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

.;D;D

MetaRNN

Benign

0.0062

T;T;T

MetaSVM

Benign

-0.31

MutationAssessor

Pathogenic

3.9

H;H;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.68

PROVEAN

Pathogenic

-4.7

.;D;.

REVEL

Pathogenic

0.73

Sift

Pathogenic

0.0

.;D;.

Sift4G

Pathogenic

0.0

.;D;D

Polyphen

0.99

D;D;.

Vest4

0.81, 0.86

MVP

0.92

MPC

0.45

ClinPred

0.084

GERP RS

4.3

Varity_R

0.92

gMVP

0.41

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over