Genetic Variant CYP39A1:p.Phe175Val (chr6-46637944-A-C) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_016593.5(CYP39A1):c.523T>G(p.Phe175Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000548 in 1,460,956 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 Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

CYP39A1
NM_016593.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.91

Variant links:

Genes affected

CYP39A1 (HGNC:17449): (cytochrome P450 family 39 subfamily A member 1) 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 endoplasmic reticulum protein is involved in the conversion of cholesterol to bile acids. Its substrates include the oxysterols 25-hydroxycholesterol, 27-hydroxycholesterol and 24-hydroxycholesterol. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

CYP39A1 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;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.887

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYP39A1	NM_016593.5 link	c.523T>G	p.Phe175Val	missense_variant	Exon 4 of 12	ENST00000275016.3	NP_057677.2	Q9NYL5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CYP39A1	ENST00000275016.3 link	c.523T>G	p.Phe175Val	missense_variant	Exon 4 of 12	1	NM_016593.5	ENSP00000275016.2	Q9NYL5
CYP39A1	ENST00000619708.4 link	c.7T>G	p.Phe3Val	missense_variant	Exon 3 of 11	1		ENSP00000477769.1	A0A087WTD2
CYP39A1	ENST00000480804.1 link	n.-59T>G		upstream_gene_variant		5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000120

AC:

AN:

250390

Hom.:

AF XY:

0.0000222

AC XY:

AN XY:

135344

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000548

AC:

AN:

1460956

Hom.:

Cov.:

AF XY:

0.00000826

AC XY:

AN XY:

726772

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:

0.00000630

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000189

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 16, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.523T>G (p.F175V) alteration is located in exon 4 (coding exon 4) of the CYP39A1 gene. This alteration results from a T to G substitution at nucleotide position 523, causing the phenylalanine (F) at amino acid position 175 to be replaced by a valine (V). 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

Pathogenic

0.65

BayesDel_addAF

Pathogenic

0.30

BayesDel_noAF

Pathogenic

0.26

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.088

.;T

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.36

T;T

M_CAP

Benign

0.068

MetaRNN

Pathogenic

0.89

D;D

MetaSVM

Uncertain

-0.043

MutationAssessor

Uncertain

2.8

.;M

PrimateAI

Uncertain

0.60

PROVEAN

Pathogenic

-5.2

.;D

REVEL

Pathogenic

0.73

Sift

Uncertain

0.0030

.;D

Sift4G

Uncertain

0.013

D;D

Polyphen

1.0

.;D

Vest4

0.75

MVP

0.85

MPC

0.31

ClinPred

0.98

GERP RS

5.9

Varity_R

0.64

gMVP

0.68

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