rs3747809

Positions:

• chr8-58494425-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The ENST00000301645.4(CYP7A1):​c.1039+81A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00164 in 1,455,608 control chromosomes in the GnomAD database, including 54 homozygotes. 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: 𝑓 0.0014 (6 hom., cov: 32)
  • Exomes 𝑓: 0.0017 (48 hom.)
• Consequence: CYP7A1 ENST00000301645.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.459

Genes affected

CYP7A1 (HGNC:2651): (cytochrome P450 family 7 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 membrane protein catalyzes the first reaction in the cholesterol catabolic pathway in the liver, which converts cholesterol to bile acids. This reaction is the rate limiting step and the major site of regulation of bile acid synthesis, which is the primary mechanism for the removal of cholesterol from the body. Polymorphisms in the promoter of this gene are associated with defects in bile acid synthesis. [provided by RefSeq, Feb 2010]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BS1: Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.00143 (218/152272) while in subpopulation EAS AF= 0.0364 (189/5186). AF 95% confidence interval is 0.0322. There are 6 homozygotes in gnomad4. There are 140 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 6 SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYP7A1	NM_000780.4	c.1039+81A>G		intron_variant		ENST00000301645.4	NP_000771.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYP7A1	ENST00000301645.4	c.1039+81A>G		intron_variant		1	NM_000780.4	ENSP00000301645	P1

Frequencies

GnomAD3 genomes AF: 0.00144 AC: 219 AN: 152154 Hom.: 6 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.0364

Gnomad SAS AF: 0.00395

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00191

GnomAD4 exome AF: 0.00167 AC: 2172 AN: 1303336 Hom.: 48 AF XY: 0.00169 AC XY: 1111 AN XY: 656180

Gnomad4 AFR exome AF: 0.0000331

Gnomad4 AMR exome AF: 0.000136

Gnomad4 ASJ exome AF: 0.0000400

Gnomad4 EAS exome AF: 0.0487

Gnomad4 SAS exome AF: 0.00148

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000783

Gnomad4 OTH exome AF: 0.00136

GnomAD4 genome AF: 0.00143 AC: 218 AN: 152272 Hom.: 6 Cov.: 32 AF XY: 0.00188 AC XY: 140 AN XY: 74456

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.0364

Gnomad4 SAS AF: 0.00396

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00142

Alfa AF: 0.000303 Hom.: 1

Bravo AF: 0.00162

Asia WGS AF: 0.0130 AC: 45 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	0.46
DANN	Benign	0.40

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: rs3747809; hg19: chr8-59406984;