8-142876741-C-T

Position:

• chr8-142876741-C-T

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PVS1 PP5_Very_Strong

The ENST00000292427.10(CYP11B1):​c.740G>A​(p.Trp247Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000123 in 1,461,716 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: CYP11B1 ENST00000292427.10 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 0.271

Genes affected

CYP11B1 (HGNC:2591): (cytochrome P450 family 11 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 protein localizes to the mitochondrial inner membrane and is involved in the conversion of progesterone to cortisol in the adrenal cortex. Mutations in this gene cause congenital adrenal hyperplasia due to 11-beta-hydroxylase deficiency. Transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Jul 2008]

GML (HGNC:4375): (glycosylphosphatidylinositol anchored molecule like) Predicted to be involved in DNA damage response, signal transduction by p53 class mediator resulting in cell cycle arrest; apoptotic process; and negative regulation of cell population proliferation. Predicted to be extrinsic component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Pathogenic. Variant got 16 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PP5: Variant 8-142876741-C-T is Pathogenic according to our data. Variant chr8-142876741-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 554358.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYP11B1	NM_000497.4	c.740G>A	p.Trp247Ter	stop_gained	4/9	ENST00000292427.10	NP_000488.3
CYP11B1	NM_001026213.1	c.740G>A	p.Trp247Ter	stop_gained	4/8		NP_001021384.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYP11B1	ENST00000292427.10	c.740G>A	p.Trp247Ter	stop_gained	4/9	1	NM_000497.4	ENSP00000292427	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.0000123 AC: 18 AN: 1461716 Hom.: 0 Cov.: 86 AF XY: 0.0000165 AC XY: 12 AN XY: 727134

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.0000162

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Deficiency of steroid 11-beta-monooxygenase Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Sep 08, 2022	- -
Pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Oct 17, 2017	- -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 08, 2023

For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 554358). This premature translational stop signal has been observed in individual(s) with adrenal hyperplasia (PMID: 8768848). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Trp247*) in the CYP11B1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in CYP11B1 are known to be pathogenic (PMID: 8506298, 26476331). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.65	D
BayesDel_noAF	Pathogenic	0.29
CADD	Pathogenic	38
DANN	Uncertain	0.99
Eigen	Uncertain	0.30
Eigen_PC	Benign	-0.0069
FATHMM_MKL	Benign	0.014	N
MutationTaster	Benign	1.0	A;A;A
Vest4		0.71
GERP RS		2.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs866430018; hg19: chr8-143958157;