dbSNP rs17881883: CYP2C19:c.168+20G>A (chr10-94762893-G-A) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_000769.4(CYP2C19):c.168+20G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000513 in 1,609,558 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0027 ( 3 hom., cov: 33)

Exomes 𝑓: 0.00028 ( 3 hom. )

Consequence

CYP2C19
NM_000769.4 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.321

Publications

1 publications found

Variant links:

Genes affected

CYP2C19 (HGNC:2621): (cytochrome P450 family 2 subfamily C member 19) 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 many xenobiotics, including the anticonvulsive drug mephenytoin, omeprazole, diazepam and some barbiturates. Polymorphism within this gene is associated with variable ability to metabolize mephenytoin, known as the poor metabolizer and extensive metabolizer phenotypes. The gene is located within a cluster of cytochrome P450 genes on chromosome 10q24. [provided by RefSeq, Jul 2008]

CYP2C19 links:

ENSG00000276490 (HGNC:):

ENSG00000276490 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.9).

BS2

High AC in GnomAd4 at 415 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000769.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CYP2C19	NM_000769.4	MANE Select	c.168+20G>A		intron	N/A	NP_000760.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
CYP2C19	ENST00000371321.9	TSL:1 MANE Select	c.168+20G>A	intron	N/A	ENSP00000360372.3
CYP2C19	ENST00000480405.2	TSL:1	c.168+20G>A	intron	N/A	ENSP00000483847.1
ENSG00000276490	ENST00000464755.1	TSL:2	n.932-12165G>A	intron	N/A	ENSP00000483243.1

Frequencies

GnomAD3 genomes

AF:

0.00272

AC:

413

AN:

152054

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00964

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000458

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00192

GnomAD2 exomes

AF:

0.000817

AC:

205

AN:

250808

AF XY:

0.000664

show subpopulations

Gnomad AFR exome

AF:

0.00992

Gnomad AMR exome

AF:

0.000956

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000441

Gnomad OTH exome

AF:

0.000820

GnomAD4 exome

AF:

0.000281

AC:

410

AN:

1457386

Hom.:

Cov.:

AF XY:

0.000259

AC XY:

188

AN XY:

725388

show subpopulations

African (AFR)

AF:

0.00961

AC:

320

AN:

33308

American (AMR)

AF:

0.000806

AC:

AN:

44692

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26106

East Asian (EAS)

AF:

0.00

AC:

AN:

39662

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86156

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53334

Middle Eastern (MID)

AF:

0.000705

AC:

AN:

5672

European-Non Finnish (NFE)

AF:

0.00000993

AC:

AN:

1108272

Other (OTH)

AF:

0.000615

AC:

AN:

60184

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.454

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00273

AC:

415

AN:

152172

Hom.:

Cov.:

AF XY:

0.00250

AC XY:

186

AN XY:

74396

show subpopulations

African (AFR)

AF:

0.00966

AC:

401

AN:

41530

American (AMR)

AF:

0.000458

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10554

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68004

Other (OTH)

AF:

0.00190

AC:

AN:

2106

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00132

Hom.:

Bravo

AF:

0.00311

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

4.0

(source)

DANN

Benign

0.53

PhyloP100

-0.32

PromoterAI

-0.032

Neutral

(source)

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over