Variant 14-99726711-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_006668.2(CYP46A1):c.1487C>T(p.Pro496Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000195 in 1,535,210 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000094 ( 0 hom. )

Consequence

CYP46A1
NM_006668.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.69

Variant links:

Genes affected

CYP46A1 (HGNC:2641): (cytochrome P450 family 46 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 expressed in the brain, where it converts cholesterol to 24S-hydroxycholesterol. While cholesterol cannot pass the blood-brain barrier, 24S-hydroxycholesterol can be secreted in the brain into the circulation to be returned to the liver for catabolism. [provided by RefSeq, Jul 2008]

CYP46A1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.17056191).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CYP46A1	NM_006668.2 linkuse as main transcript	c.1487C>T	p.Pro496Leu	missense_variant	15/15	ENST00000261835.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CYP46A1	ENST00000261835.8 linkuse as main transcript	c.1487C>T	p.Pro496Leu	missense_variant	15/15	1	NM_006668.2	P1	Q9Y6A2-1
CYP46A1	ENST00000380228.6 linkuse as main transcript	c.1196C>T	p.Pro399Leu	missense_variant	15/15	2			Q9Y6A2-2
CYP46A1	ENST00000554176.5 linkuse as main transcript	n.1664C>T		non_coding_transcript_exon_variant	10/10	2

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

152070

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000290

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000227

AC:

AN:

132166

Hom.:

AF XY:

0.0000140

AC XY:

AN XY:

71438

show subpopulations

Gnomad AFR exome

AF:

0.000467

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000940

AC:

AN:

1383140

Hom.:

Cov.:

AF XY:

0.00000881

AC XY:

AN XY:

680926

show subpopulations

Gnomad4 AFR exome

AF:

0.000256

Gnomad4 AMR exome

AF:

0.0000292

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:

9.33e-7

Gnomad4 OTH exome

AF:

0.0000525

GnomAD4 genome

AF:

0.000112

AC:

AN:

152070

Hom.:

Cov.:

AF XY:

0.0000943

AC XY:

AN XY:

74258

show subpopulations

Gnomad4 AFR

AF:

0.000290

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.000185

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 25, 2023

The c.1487C>T (p.P496L) alteration is located in exon 15 (coding exon 15) of the CYP46A1 gene. This alteration results from a C to T substitution at nucleotide position 1487, causing the proline (P) at amino acid position 496 to be replaced by a leucine (L). 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

0.096

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.29

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.25

T;.

Eigen

Benign

-0.13

Eigen_PC

Benign

-0.084

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.85

D;D

M_CAP

Uncertain

0.087

MetaRNN

Benign

0.17

T;T

MetaSVM

Benign

-0.79

MutationAssessor

Benign

0.34

N;.

MutationTaster

Benign

0.96

D;D;D

PrimateAI

Uncertain

0.69

PROVEAN

Benign

-0.17

N;.

REVEL

Benign

0.17

Sift

Uncertain

0.0090

D;.

Sift4G

Benign

0.071

T;T

Polyphen

0.75

P;.

Vest4

0.39

MutPred

0.32

Loss of glycosylation at P496 (P = 5e-04);.;

MVP

0.37

MPC

1.2

ClinPred

0.069

GERP RS

2.8

Varity_R

0.075

gMVP

0.28

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