19-15618052-A-T

Variant names:

• chr19-15618052-A-T
• rs1568381738
• NM_007253.4:c.251A>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_007253.4(CYP4F8):​c.251A>T​(p.Tyr84Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 10/15 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. Y84C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CYP4F8 NM_007253.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.282
• Publications: 0 publications found

Genes affected

CYP4F8 (HGNC:2648): (cytochrome P450 family 4 subfamily F member 8) This gene, CYP4F8, 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 functions as a 19-hydroxylase of prostaglandins in seminal vesicles. This gene is part of a cluster of cytochrome P450 genes on chromosome 19. Another member of this family, CYP4F3, is approximately 18 kb away. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_007253.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CYP4F8	NM_007253.4	MANE Select	c.251A>T	p.Tyr84Phe	missense	Exon 3 of 13	NP_009184.1	P98187

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CYP4F8	ENST00000612078.5	TSL:1 MANE Select	c.251A>T	p.Tyr84Phe	missense	Exon 3 of 13	ENSP00000477567.1	P98187
	CYP4F8	ENST00000617645.4	TSL:3	c.266A>T	p.Tyr89Phe	missense	Exon 3 of 6	ENSP00000478555.1	A0A087WUC9
	CYP4F8	ENST00000441682.6	TSL:2	n.315A>T		non_coding_transcript_exon	Exon 3 of 11

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.0054	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	5.3
DANN	Benign	0.15
DEOGEN2	Benign	0.069	T
Eigen	Benign	-0.98
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.014	N
LIST_S2	Benign	0.84	T
MetaRNN	Uncertain	0.60	D
MetaSVM	Benign	-1.0	T
PhyloP100		0.28
PrimateAI	Benign	0.34	T
Sift4G	Benign	0.81	T
Polyphen		0.0040	B
Vest4		0.18
MutPred		0.85		Loss of catalytic residue at Y84 (P = 0.2764)
MVP		0.10
ClinPred		0.24	T
GERP RS		-0.39
Varity_R		0.12
gMVP		0.40
Mutation Taster		=97/3	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1568381738; hg19: chr19-15728863;