14-99726704-G-A

Position:

chr14-99726704-G-A

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The NM_006668.2(CYP46A1):c.1480G>A(p.Ala494Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000403 in 1,538,252 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000040 ( 0 hom. )

Consequence

CYP46A1
NM_006668.2 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 1.29

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 Likely_benign. Variant got -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.045402646).

BP6

Variant 14-99726704-G-A is Benign according to our data. Variant chr14-99726704-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 2355180.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYP46A1	NM_006668.2 linkuse as main transcript	c.1480G>A	p.Ala494Thr	missense_variant	15/15	ENST00000261835.8	NP_006659.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYP46A1	ENST00000261835.8 linkuse as main transcript	c.1480G>A	p.Ala494Thr	missense_variant	15/15	1	NM_006668.2	ENSP00000261835	P1	Q9Y6A2-1
CYP46A1	ENST00000380228.6 linkuse as main transcript	c.1189G>A	p.Ala397Thr	missense_variant	15/15	2		ENSP00000369577		Q9Y6A2-2
CYP46A1	ENST00000554176.5 linkuse as main transcript	n.1657G>A		non_coding_transcript_exon_variant	10/10	2

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

151942

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000736

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000438

AC:

AN:

136958

Hom.:

AF XY:

0.0000135

AC XY:

AN XY:

74074

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000373

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000409

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000404

AC:

AN:

1386310

Hom.:

Cov.:

AF XY:

0.0000337

AC XY:

AN XY:

682662

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000196

Gnomad4 SAS exome

AF:

0.0000129

Gnomad4 FIN exome

AF:

0.0000420

Gnomad4 NFE exome

AF:

0.0000410

Gnomad4 OTH exome

AF:

0.0000350

GnomAD4 genome

AF:

0.0000395

AC:

AN:

151942

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

74190

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000736

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000302

ExAC

AF:

0.00000993

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 12, 2021

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.090

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Benign

-0.43

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.25

T;.

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.024

LIST_S2

Benign

0.66

T;T

M_CAP

Benign

0.023

MetaRNN

Benign

0.045

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.20

N;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Uncertain

0.55

PROVEAN

Benign

-0.41

N;.

REVEL

Benign

0.16

Sift

Benign

0.086

T;.

Sift4G

Benign

0.076

T;T

Polyphen

1.0

D;.

Vest4

0.086

MutPred

0.18

Gain of glycosylation at A494 (P = 0.0011);.;

MVP

0.54

MPC

1.1

ClinPred

0.085

GERP RS

0.89

Varity_R

0.039

gMVP

0.38

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