2-31580885-G-A

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_000348.4(SRD5A2):c.16C>T(p.Gln6*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000809 in 1,606,588 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 35)

Exomes 𝑓: 0.0000083 ( 0 hom. )

Consequence

SRD5A2
NM_000348.4 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:7

Conservation

PhyloP100: 2.84

Variant links:

Genes affected

SRD5A2 (HGNC:11285): (steroid 5 alpha-reductase 2) This gene encodes a microsomal protein expressed at high levels in androgen-sensitive tissues such as the prostate. The encoded protein is active at acidic pH and is sensitive to the 4-azasteroid inhibitor finasteride. Deficiencies in this gene can result in male pseudohermaphroditism, specifically pseudovaginal perineoscrotal hypospadias (PPSH). [provided by RefSeq, Jul 2008]

SRD5A2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 80 pathogenic variants in the truncated region.

PP5

Variant 2-31580885-G-A is Pathogenic according to our data. Variant chr2-31580885-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 436859.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-31580885-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SRD5A2	NM_000348.4 link	c.16C>T	p.Gln6*	stop_gained	Exon 1 of 5	ENST00000622030.2	NP_000339.2	P31213
SRD5A2	XM_011533072.3 link	c.27-47119C>T		intron_variant	Intron 3 of 6		XP_011531374.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SRD5A2	ENST00000622030.2 link	c.16C>T	p.Gln6*	stop_gained	Exon 1 of 5	1	NM_000348.4	ENSP00000477587.1		P31213

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000169

AC:

AN:

236872

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000169

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000949

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000825

AC:

AN:

1454252

Hom.:

Cov.:

AF XY:

0.00000553

AC XY:

AN XY:

722798

show subpopulations

Gnomad4 AFR exome

AF:

0.00

AC:

AN:

33354

Gnomad4 AMR exome

AF:

0.00

AC:

AN:

44586

Gnomad4 ASJ exome

AF:

0.00

AC:

AN:

26036

Gnomad4 EAS exome

AF:

0.000227

AC:

AN:

39578

Gnomad4 SAS exome

AF:

0.00

AC:

AN:

86136

Gnomad4 FIN exome

AF:

0.00

AC:

AN:

50014

Gnomad4 NFE exome

AF:

0.00000180

AC:

AN:

1108788

Gnomad4 Remaining exome

AF:

0.0000166

AC:

AN:

60068

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

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

AF:

0.00000656

AC:

AN:

152336

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74474

show subpopulations

Gnomad4 AFR

AF:

0.00

AC:

AN:

Gnomad4 AMR

AF:

0.00

AC:

AN:

Gnomad4 ASJ

AF:

0.00

AC:

AN:

Gnomad4 EAS

AF:

0.000194

AC:

0.000193874

AN:

0.000193874

Gnomad4 SAS

AF:

0.00

AC:

AN:

Gnomad4 FIN

AF:

0.00

AC:

AN:

Gnomad4 NFE

AF:

0.00

AC:

AN:

Gnomad4 OTH

AF:

0.00

AC:

AN:

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000542

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000166

AC:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

3-Oxo-5 alpha-steroid delta 4-dehydrogenase deficiency

Pathogenic:5

Feb 19, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Gln6*) in the SRD5A2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SRD5A2 are known to be pathogenic (PMID: 1406794, 1944596). This variant is present in population databases (rs9332960, gnomAD 0.02%). This premature translational stop signal has been observed in individuals with steroid 5-alpha-reductase deficiency (PMID: 12576851, 18314109, 20190539, 21540559). ClinVar contains an entry for this variant (Variation ID: 436859). For these reasons, this variant has been classified as Pathogenic. -

Seattle Children's Hospital Molecular Genetics Laboratory, Seattle Children's Hospital

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jan 26, 2011

Clinical Molecular Genetics Laboratory, Johns Hopkins All Children's Hospital

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

May 22, 2017

Genetic Services Laboratory, University of Chicago

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Juno Genomics, Hangzhou Juno Genomics, Inc

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PM2_Supporting+PVS1+PM3_VeryStrong+PP1+PP4 -

SRD5A2-related disorder

Pathogenic:1

Dec 14, 2022

PreventionGenetics, part of Exact Sciences

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The SRD5A2 c.16C>T variant is predicted to result in premature protein termination (p.Gln6*). This variant has been reported in many individuals with 46,XY disorder of sex development due to 5α-reductase type 2 deficiency (Nie M et al. 2011. PubMed ID: 20736251; Cheng. 2019. PubMed ID: 31031332 ). This variant is reported in 0.017% of alleles in individuals of East Asian descent in gnomAD (http://gnomad.broadinstitute.org/variant/2-31805954-G-A). Nonsense variants in SRD5A2 are expected to be pathogenic. This variant is interpreted as pathogenic. -

not provided

Pathogenic:1

Sep 22, 2017

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The Q6X nonsense variant in the SRD5A2 gene has been reported previously in both the compound heterozgyous and homozgyous state in association with 5-Alpha Reductase Deficiency type 2 (Sasaki et al., 2003; Wang et al., 2004; Sahakitrunguang et al., 2008; Nie et al., 2011; Zhu et al., 2014). This pathogenic variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. In addition, the Q6X variant is not observed at a significant frequency in large population cohorts (Lek et al., 2016). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.43

CADD

Pathogenic

DANN

Benign

0.91

FATHMM_MKL

Benign

0.64

Vest4

0.67

GERP RS

4.1

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over