8-142877206-G-A

Position:

• chr8-142877206-G-A

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM1 PM5 PP3_Moderate PP5_Very_Strong

The ENST00000292427.10(CYP11B1):​c.412C>T​(p.Arg138Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000039 in 1,461,056 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 Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R138H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.000039 (0 hom.)
• Consequence: CYP11B1 ENST00000292427.10 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3 U:1
• Conservation: PhyloP100: 0.560

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 14 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in ENST00000292427.10
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr8-142877206-G-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2746491.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.856
• PP5: Variant 8-142877206-G-A is Pathogenic according to our data. Variant chr8-142877206-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 552695.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.412C>T	p.Arg138Cys	missense_variant	3/9	ENST00000292427.10	NP_000488.3
CYP11B1	NM_001026213.1	c.412C>T	p.Arg138Cys	missense_variant	3/8		NP_001021384.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYP11B1	ENST00000292427.10	c.412C>T	p.Arg138Cys	missense_variant	3/9	1	NM_000497.4	ENSP00000292427	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000201 AC: 5 AN: 249120 Hom.: 0 AF XY: 0.0000297 AC XY: 4 AN XY: 134670

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000990

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000177

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000390 AC: 57 AN: 1461056 Hom.: 0 Cov.: 41 AF XY: 0.0000372 AC XY: 27 AN XY: 726732

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000814

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000432

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.0000545

EpiControl AF: 0.0000595

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3 Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Deficiency of steroid 11-beta-monooxygenase Pathogenic:2 Uncertain:1

Likely pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 29, 2024	- -
Uncertain significance, flagged submission	clinical testing	Counsyl	Jun 30, 2017	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Molecular Endocrinology Laboratory, Christian Medical College	-	- -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 21, 2023

Experimental studies have shown that this missense change affects CYP11B1 function (PMID: 26053152). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt CYP11B1 protein function. ClinVar contains an entry for this variant (Variation ID: 552695). This missense change has been observed in individuals with autosomal recessive congenital adrenal hyperplasia (23940125 33275286 34718183). This variant is present in population databases (rs764251434, gnomAD 0.01%). This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 138 of the CYP11B1 protein (p.Arg138Cys). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.012	T
BayesDel_noAF	Uncertain	-0.020
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.82	D;.;.
Eigen	Benign	-0.075
Eigen_PC	Benign	-0.090
FATHMM_MKL	Benign	0.59	D
LIST_S2	Uncertain	0.87	D;D;D
M_CAP	Pathogenic	0.48	D
MetaRNN	Pathogenic	0.86	D;D;D
MetaSVM	Benign	-0.66	T
MutationAssessor	Uncertain	2.9	M;M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.54	T
PROVEAN	Pathogenic	-6.6	D;D;D
REVEL	Uncertain	0.46
Sift	Pathogenic	0.0	D;D;D
Sift4G	Uncertain	0.030	D;D;D
Polyphen		0.63	P;.;P
Vest4		0.41
MutPred		0.79		.;.;Loss of methylation at R209 (P = 0.0347);
MVP		0.87
MPC		0.21
ClinPred		0.92	D
GERP RS		2.8
Varity_R		0.60
gMVP		0.55

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: rs764251434; hg19: chr8-143958622; COSMIC: COSV52830527; COSMIC: COSV52830527;