NM_173483.4:c.1424G>A

Variant names:

• chr19-15551299-G-A
• rs1403531884
• NM_173483.4:c.1424G>A

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM1 PM2 PP3_Strong

The NM_173483.4(CYP4F22):​c.1424G>A​(p.Cys475Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,892 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CYP4F22 NM_173483.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 8.78
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• autosomal recessive congenital ichthyosis 5

  Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp, PanelApp Australia, Labcorp Genetics (formerly Invitae)
• lamellar ichthyosis

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PM1: In a binding_site axial binding residue (size 0) in uniprot entity CP4FN_HUMAN
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.993

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYP4F22	NM_173483.4	c.1424G>A	p.Cys475Tyr	missense_variant	Exon 14 of 14	ENST00000269703.8	NP_775754.2
CYP4F22	XM_011527692.3	c.1424G>A	p.Cys475Tyr	missense_variant	Exon 15 of 15		XP_011525994.1
CYP4F22	XM_011527693.3	c.1424G>A	p.Cys475Tyr	missense_variant	Exon 14 of 14		XP_011525995.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYP4F22	ENST00000269703.8	c.1424G>A	p.Cys475Tyr	missense_variant	Exon 14 of 14	2	NM_173483.4	ENSP00000269703.1
CYP4F22	ENST00000601005.2	c.1424G>A	p.Cys475Tyr	missense_variant	Exon 12 of 12	5		ENSP00000469866.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD2 exomes AF: 0.00000406 AC: 1 AN: 246334 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000902

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459892 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 726046

African (AFR) AF: 0.00 AC: 0 AN: 33410

American (AMR) AF: 0.00 AC: 0 AN: 44528

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26064

East Asian (EAS) AF: 0.00 AC: 0 AN: 39634

South Asian (SAS) AF: 0.00 AC: 0 AN: 85742

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53256

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5750

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111192

Other (OTH) AF: 0.00 AC: 0 AN: 60316

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Autosomal recessive congenital ichthyosis 5 Pathogenic:1

Apr 23, 2018

Institute for Human Genetics, University Medical Center Freiburg

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not provided Uncertain:1

May 01, 2017

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.56	D
BayesDel_noAF	Pathogenic	0.57
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.61	D;D
Eigen	Pathogenic	0.92
Eigen_PC	Pathogenic	0.80
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Pathogenic	0.99	.;D
M_CAP	Pathogenic	0.39	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Pathogenic	0.92	D
MutationAssessor	Pathogenic	4.4	H;H
PhyloP100		8.8
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-10	D;.
REVEL	Pathogenic	0.99
Sift	Pathogenic	0.0	D;.
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.94
MutPred		0.97		Loss of catalytic residue at S479 (P = 0.1244);Loss of catalytic residue at S479 (P = 0.1244);
MVP		0.94
MPC		1.1
ClinPred		1.0	D
GERP RS		4.4
Varity_R		0.96
gMVP		0.99
Mutation Taster		=10/90	disease causing

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

Other links and lift over

dbSNP: rs1403531884; hg19: chr19-15662110;