chr1-119514055-G-C

Variant names:

• chr1-119514055-G-C
• rs145376537
• NM_000862.3:c.532G>C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_000862.3(HSD3B1):​c.532G>C​(p.Gly178Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,824 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G178S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: HSD3B1 NM_000862.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.47

Genes affected

HSD3B1 (HGNC:5217): (hydroxy-delta-5-steroid dehydrogenase, 3 beta- and steroid delta-isomerase 1) The protein encoded by this gene is an enzyme that catalyzes the oxidative conversion of delta-5-3-beta-hydroxysteroid precursors into delta-4-ketosteroids, which leads to the production of all classes of steroid hormones. The encoded protein also catalyzes the interconversion of 3-beta-hydroxy- and 3-keto-5-alpha-androstane steroids. [provided by RefSeq, Jun 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.766

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HSD3B1	NM_000862.3	c.532G>C	p.Gly178Arg	missense_variant	Exon 4 of 4	ENST00000369413.8	NP_000853.1
HSD3B1	NM_001328615.1	c.532G>C	p.Gly178Arg	missense_variant	Exon 4 of 4		NP_001315544.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HSD3B1	ENST00000369413.8	c.532G>C	p.Gly178Arg	missense_variant	Exon 4 of 4	1	NM_000862.3	ENSP00000358421.3
HSD3B1	ENST00000528909.1	c.532G>C	p.Gly178Arg	missense_variant	Exon 3 of 3	1		ENSP00000432268.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251174 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135738

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: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461824 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727210

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: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Uncertain	0.022	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.68	D;D
Eigen	Uncertain	0.33
Eigen_PC	Benign	0.19
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.77	.;T
M_CAP	Benign	0.055	D
MetaRNN	Pathogenic	0.77	D;D
MetaSVM	Uncertain	0.41	D
MutationAssessor	Pathogenic	3.0	M;M
PrimateAI	Benign	0.41	T
PROVEAN	Pathogenic	-5.4	D;D
REVEL	Uncertain	0.56
Sift	Uncertain	0.0030	D;D
Sift4G	Benign	0.062	T;T
Polyphen		0.88	P;P
Vest4		0.44
MVP		0.91
MPC		0.18
ClinPred		0.99	D
GERP RS		2.8
Varity_R		0.73
gMVP		0.68

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

LitVar

Other links and lift over

dbSNP: rs145376537; hg19: chr1-120056678;