rs80358216

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_000198.4(HSD3B2):c.512G>A(p.Trp171*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,826 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 (★★).

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

HSD3B2
NM_000198.4 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 0.840

Publications

6 publications found

Variant links:

Genes affected

HSD3B2 (HGNC:5218): (hydroxy-delta-5-steroid dehydrogenase, 3 beta- and steroid delta-isomerase 2) The protein encoded by this gene is a bifunctional enzyme that catalyzes the oxidative conversion of delta(5)-ene-3-beta-hydroxy steroid, and the oxidative conversion of ketosteroids. It plays a crucial role in the biosynthesis of all classes of hormonal steroids. This gene is predominantly expressed in the adrenals and the gonads. Mutations in this gene are associated with 3-beta-hydroxysteroid dehydrogenase, type II, deficiency. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Oct 2009]

HSD3B2 Gene-Disease associations (from GenCC):

congenital adrenal hyperplasia due to 3-beta-hydroxysteroid dehydrogenase deficiency
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet

HSD3B2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 18 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 47 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 1-119422013-G-A is Pathogenic according to our data. Variant chr1-119422013-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 12184.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HSD3B2	NM_000198.4 link	c.512G>A	p.Trp171*	stop_gained	Exon 4 of 4	ENST00000369416.4	NP_000189.1	P26439-1A0A024R0F9
HSD3B2	NM_001166120.2 link	c.512G>A	p.Trp171*	stop_gained	Exon 4 of 4		NP_001159592.1	P26439-1A0A024R0F9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
HSD3B2	ENST00000369416.4 link	c.512G>A	p.Trp171*	stop_gained	Exon 4 of 4	1	NM_000198.4	ENSP00000358424.3	P26439-1
HSD3B2	ENST00000543831.5 link	c.512G>A	p.Trp171*	stop_gained	Exon 4 of 4	3		ENSP00000445122.1	P26439-1
HSD3B2	ENST00000433745.5 link	c.512G>A	p.Trp171*	stop_gained	Exon 4 of 4	3		ENSP00000388292.1	Q5QP01
HSD3B2	ENST00000448448.2 link	n.456G>A		non_coding_transcript_exon_variant	Exon 3 of 3	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461826

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727216

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39680

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000360

AC:

AN:

1111972

Other (OTH)

AF:

0.00

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

3 beta-Hydroxysteroid dehydrogenase deficiency

Pathogenic:3

Jul 01, 1992

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Mar 28, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Oct 12, 2021

Natera, Inc.

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

not provided

Pathogenic:1

May 01, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant disrupts the C-terminus of the HSD3B2 protein, which has been demonstrated to be critical for enzymatic activity (PMID: 1825279). While functional studies have not been performed to directly test the effect of this variant on HSD3B2 protein function, this suggests that disruption of this region of the protein is causative of disease. ClinVar contains an entry for this variant (Variation ID: 12184). This premature translational stop signal has been observed in individual(s) with adrenal hyperplasia (PMID: 1363812, 27626911). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Trp171*) in the HSD3B2 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 202 amino acid(s) of the HSD3B2 protein. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.62

BayesDel_noAF

Uncertain

0.010

CADD

Pathogenic

(source)

DANN

Benign

0.96

Eigen

Benign

0.12

Eigen_PC

Benign

-0.27

FATHMM_MKL

Benign

0.036

PhyloP100

0.84

Vest4

0.54

GERP RS

0.28

Mutation Taster

=10/190

disease causing (ClinVar)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over