dbSNP rs9332239: CYP2C9:p.Pro489Ala (chr10-94989020-C-G) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PM5

The NM_000771.4(CYP2C9):c.1465C>G(p.Pro489Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,628 control chromosomes in the GnomAD database, with no homozygous occurrence. 12/21 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. P489S) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CYP2C9
NM_000771.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.40

Variant links:

Genes affected

CYP2C9 (HGNC:2623): (cytochrome P450 family 2 subfamily C member 9) 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 its expression is induced by rifampin. The enzyme is known to metabolize many xenobiotics, including phenytoin, tolbutamide, ibuprofen and S-warfarin. Studies identifying individuals who are poor metabolizers of phenytoin and tolbutamide suggest that this gene is polymorphic. The gene is located within a cluster of cytochrome P450 genes on chromosome 10q24. [provided by RefSeq, Jul 2008]

CYP2C9 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr10-94989020-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYP2C9	NM_000771.4 link	c.1465C>G	p.Pro489Ala	missense_variant	Exon 9 of 9	ENST00000260682.8	NP_000762.2	P11712-1S5RV20

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CYP2C9	ENST00000260682.8 link	c.1465C>G	p.Pro489Ala	missense_variant	Exon 9 of 9	1	NM_000771.4	ENSP00000260682.6	P11712-1
CYP2C9	ENST00000643112.1 link	n.*474C>G		non_coding_transcript_exon_variant	Exon 8 of 8			ENSP00000496202.1	A0A2R8YF67
CYP2C9	ENST00000643112.1 link	n.*474C>G		3_prime_UTR_variant	Exon 8 of 8			ENSP00000496202.1	A0A2R8YF67

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461628

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727126

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:

8.99e-7

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

Benign

0.22

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.44

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.37

Eigen

Benign

0.0023

Eigen_PC

Benign

-0.16

FATHMM_MKL

Benign

0.69

LIST_S2

Benign

0.83

M_CAP

Benign

0.0041

MetaRNN

Uncertain

0.58

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.8

PrimateAI

Benign

0.41

PROVEAN

Pathogenic

-7.0

REVEL

Benign

0.094

Sift

Uncertain

0.0010

Sift4G

Pathogenic

0.0

Polyphen

0.98

Vest4

0.36

MutPred

0.51

Gain of catalytic residue at P489 (P = 0.026);

MVP

0.55

MPC

0.043

ClinPred

0.99

GERP RS

2.5

Varity_R

0.76

gMVP

0.31

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over