19-15650060-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000896.3(CYP4F3):c.795C>A(p.Asp265Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: CYP4F3 NM_000896.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0120

Genes affected

CYP4F3 (HGNC:2646): (cytochrome P450 family 4 subfamily F member 3) This gene, CYP4F3, 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. The enzyme starts the process of inactivating and degrading leukotriene B4, a potent mediator of inflammation. This gene is part of a cluster of cytochrome P450 genes on chromosome 19. Another member of this family, CYP4F8, is approximately 18 kb away. Several transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Apr 2019]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.15929079).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CYP4F3	NM_000896.3	c.795C>A	p.Asp265Glu	missense_variant	7/13	ENST00000221307.13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CYP4F3	ENST00000221307.13	c.795C>A	p.Asp265Glu	missense_variant	7/13	1	NM_000896.3	A1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 08, 2023

The c.795C>A (p.D265E) alteration is located in exon 7 (coding exon 6) of the CYP4F3 gene. This alteration results from a C to A substitution at nucleotide position 795, causing the aspartic acid (D) at amino acid position 265 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.56
Cadd	Benign	13
Dann	Benign	0.90
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.068	N
M_CAP	Benign	0.0081	T
MetaRNN	Benign	0.16	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.5	L;L;L;L
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.30	T
Sift4G	Benign	0.46	T;T;T;T
Polyphen		0.0	.;.;B;.
Vest4		0.15
MutPred		0.58		Loss of MoRF binding (P = 0.0866);Loss of MoRF binding (P = 0.0866);Loss of MoRF binding (P = 0.0866);Loss of MoRF binding (P = 0.0866);
MVP		0.49
MPC		0.035
ClinPred		0.068	T
GERP RS		0.41
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.095
gMVP		0.072

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.

Other links and lift over

hg19: chr19-15760870;