8-64596702-C-A

Position:

• chr8-64596702-C-A

Variant summary

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

The NM_004820.5(CYP7B1):​c.1461G>T​(p.Leu487Phe) 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 (★). Synonymous variant affecting the same amino acid position (i.e. L487L) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CYP7B1 NM_004820.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.809

Genes affected

CYP7B1 (HGNC:2652): (cytochrome P450 family 7 subfamily B 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 membrane protein catalyzes the first reaction in the cholesterol catabolic pathway of extrahepatic tissues, which converts cholesterol to bile acids. This enzyme likely plays a minor role in total bile acid synthesis, but may also be involved in the development of atherosclerosis, neurosteroid metabolism and sex hormone synthesis. Mutations in this gene have been associated with hereditary spastic paraplegia (SPG5 or HSP), an autosomal recessive disorder. [provided by RefSeq, Apr 2016]

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=0.11553794).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CYP7B1	NM_004820.5	c.1461G>T	p.Leu487Phe	missense_variant	6/6	ENST00000310193.4
CYP7B1	XM_017014002.2	c.1527G>T	p.Leu509Phe	missense_variant	7/7
CYP7B1	NM_001324112.2	c.1234-6858G>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CYP7B1	ENST00000310193.4	c.1461G>T	p.Leu487Phe	missense_variant	6/6	1	NM_004820.5	P1
CYP7B1	ENST00000523954.1	n.508-6858G>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Eurofins Ntd Llc (ga)

May 11, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	0.60
DANN	Benign	0.94
DEOGEN2	Benign	0.13	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.057	N
LIST_S2	Benign	0.56	T
M_CAP	Benign	0.046	D
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-0.84	T
MutationAssessor	Benign	0.29	N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.12
Sift	Benign	0.18	T
Sift4G	Benign	0.33	T
Polyphen		0.0060	B
Vest4		0.025
MutPred		0.52		Loss of stability (P = 0.0515);
MVP		0.65
MPC		0.084
ClinPred		0.044	T
GERP RS		1.3
Varity_R		0.034
gMVP		0.61

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

Other links and lift over

dbSNP: rs1213447459; hg19: chr8-65509259;