rs754203

Positions:

• chr14-99691630-A-C
• chr14-99691630-A-G
• chr14-99691630-A-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_006668.2(CYP46A1):​c.201-150A>C variant causes a intron 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CYP46A1 NM_006668.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.591

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]

(HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CYP46A1	NM_006668.2	c.201-150A>C		intron_variant		ENST00000261835.8
CYP46A1	XM_011536364.2	c.201-150A>C		intron_variant
CYP46A1	XM_017020933.3	c.44-150A>C		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CYP46A1	ENST00000261835.8	c.201-150A>C		intron_variant		1	NM_006668.2	P1
	ENST00000555875.1	n.308T>G		non_coding_transcript_exon_variant	3/3	3
CYP46A1	ENST00000554611.5	c.201-150A>C		intron_variant, NMD_transcript_variant		1
CYP46A1	ENST00000380228.6	c.-91-150A>C		intron_variant		2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 7

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	1.1
DANN	Benign	0.66

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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

Other links and lift over

dbSNP: rs754203; hg19: chr14-100157967;