rs768098854

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PM2PM5PP3_StrongPP5_Very_Strong

The NM_173483.4(CYP4F22):c.727C>T(p.Arg243Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000285 in 1,614,044 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R243H) has been classified as Pathogenic.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000030 ( 0 hom. )

Consequence

CYP4F22
NM_173483.4 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 5.17

Variant links:

Genes affected

CYP4F22 (HGNC:26820): (cytochrome P450 family 4 subfamily F member 22) 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 gene is part of a cluster of cytochrome P450 genes on chromosome 19 and encodes an enzyme thought to play a role in the 12(R)-lipoxygenase pathway. Mutations in this gene are the cause of ichthyosis lamellar type 3. [provided by RefSeq, Jul 2008]

CYP4F22 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 16 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr19-15540506-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 911.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.991

PP5

Variant 19-15540505-C-T is Pathogenic according to our data. Variant chr19-15540505-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 560330.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CYP4F22	NM_173483.4 linkuse as main transcript	c.727C>T	p.Arg243Cys	missense_variant	8/14	ENST00000269703.8
CYP4F22	XM_011527692.3 linkuse as main transcript	c.727C>T	p.Arg243Cys	missense_variant	9/15
CYP4F22	XM_011527693.3 linkuse as main transcript	c.727C>T	p.Arg243Cys	missense_variant	8/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CYP4F22	ENST00000269703.8 linkuse as main transcript	c.727C>T	p.Arg243Cys	missense_variant	8/14	2	NM_173483.4	P1
CYP4F22	ENST00000601005.2 linkuse as main transcript	c.727C>T	p.Arg243Cys	missense_variant	6/12	5		P1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152158

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251400

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

135900

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000301

AC:

AN:

1461886

Hom.:

Cov.:

AF XY:

0.0000316

AC XY:

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000351

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152158

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74336

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Lamellar ichthyosis

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Feb 21, 2023

Variant summary: CYP4F22 c.727C>T (p.Arg243Cys) results in a non-conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 2.4e-05 in 251400 control chromosomes (gnomAD). c.727C>T has been reported in the literature in bi-allelic individuals affected with Lamellar Ichthyosis (example: Pigg_2016). To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. A different variant affecting the same amino acid (p.R243H) is classified pathogenic by our lab and in ClinVar. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 and classified the variant as pathogenic/likely pathogenic. Based on the evidence outlined above, the variant was classified as likely pathogenic. -

Autosomal recessive congenital ichthyosis 5

Pathogenic:1

Pathogenic, no assertion criteria provided

clinical testing

Institute for Human Genetics, University Medical Center Freiburg

Apr 23, 2018

- -

not provided

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Feb 04, 2021

In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 30011118, 27025581) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.84

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Pathogenic

0.30

Cadd

Pathogenic

Dann

Pathogenic

1.0

DEOGEN2

Benign

0.38

T;T

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.55

FATHMM_MKL

Uncertain

0.96

M_CAP

Uncertain

0.23

MetaRNN

Pathogenic

0.99

D;D

MetaSVM

Uncertain

0.44

MutationAssessor

Pathogenic

4.0

H;H

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.70

PROVEAN

Pathogenic

-7.2

D;.

REVEL

Pathogenic

0.73

Sift

Pathogenic

0.0

D;.

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.97

MutPred

0.91

Gain of methylation at R246 (P = 0.0331);Gain of methylation at R246 (P = 0.0331);

MVP

0.87

MPC

0.98

ClinPred

1.0

GERP RS

5.4

Varity_R

0.91

gMVP

0.83

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