rs776656223

Variant names:

• chr1-119415420-A-T
• rs776656223
• NM_000198.4:c.1A>T

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000198.4(HSD3B2):​c.1A>T​(p.Met1?) variant causes a initiator codon change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,616 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: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: HSD3B2 NM_000198.4 initiator_codon
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: -0.396
• Publications: 0 publications found

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: Orphanet, Labcorp Genetics (formerly Invitae)

ENSG00000307032 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 13 pathogenic variants. Next in-frame start position is after 97 codons. Genomic position: 119419564. Lost 0.258 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-119415420-A-T is Pathogenic according to our data. Variant chr1-119415420-A-T is described in ClinVar as Pathogenic. ClinVar VariationId is 2748075.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000198.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HSD3B2	NM_000198.4	MANE Select	c.1A>T	p.Met1?	initiator_codon	Exon 2 of 4	NP_000189.1	P26439-1
	HSD3B2	NM_001166120.2		c.1A>T	p.Met1?	initiator_codon	Exon 2 of 4	NP_001159592.1	P26439-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HSD3B2	ENST00000369416.4	TSL:1 MANE Select	c.1A>T	p.Met1?	initiator_codon	Exon 2 of 4	ENSP00000358424.3	P26439-1
	HSD3B2	ENST00000543831.5	TSL:3	c.1A>T	p.Met1?	initiator_codon	Exon 2 of 4	ENSP00000445122.1	P26439-1
	HSD3B2	ENST00000902254.1		c.1A>T	p.Met1?	initiator_codon	Exon 1 of 3	ENSP00000572313.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251068 AF XY: 0.00000737

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461616 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727114

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.00 AC: 0 AN: 44704

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.00 AC: 0 AN: 39672

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5750

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111854

Other (OTH) AF: 0.00 AC: 0 AN: 60374

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
CADD	Benign	0.016
DANN	Benign	0.68
DEOGEN2	Benign	0.17	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.016	N
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.97	D
MetaRNN	Pathogenic	0.94	D
MetaSVM	Pathogenic	1.5	D
PhyloP100		-0.40
PROVEAN	Benign	-0.64	N
REVEL	Uncertain	0.45
Sift	Pathogenic	0.0	D
Sift4G	Benign	0.10	T
Polyphen		0.0010	B
Vest4		0.18
MutPred		0.98		Loss of disorder (P = 0.1234)
MVP		0.96
ClinPred		0.16	T
GERP RS		-4.0
PromoterAI		-0.0029	Neutral
Varity_R		0.83
gMVP		0.18
Mutation Taster		=83/117	disease causing

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

Other links and lift over

dbSNP: rs776656223; hg19: chr1-119958043;