Genetic Variant HSD11B2:c.664+15_664+16dupCC (chr16-67436149-G-GCC) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_000196.4(HSD11B2):c.664+15_664+16dupCC variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000056 in 1,428,848 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000056 ( 0 hom. )

Consequence

HSD11B2
NM_000196.4 intron

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.349

Publications

0 publications found

Variant links:

Genes affected

HSD11B2 (HGNC:5209): (hydroxysteroid 11-beta dehydrogenase 2) There are at least two isozymes of the corticosteroid 11-beta-dehydrogenase, a microsomal enzyme complex responsible for the interconversion of cortisol and cortisone. The type I isozyme has both 11-beta-dehydrogenase (cortisol to cortisone) and 11-oxoreductase (cortisone to cortisol) activities. The type II isozyme, encoded by this gene, has only 11-beta-dehydrogenase activity. In aldosterone-selective epithelial tissues such as the kidney, the type II isozyme catalyzes the glucocorticoid cortisol to the inactive metabolite cortisone, thus preventing illicit activation of the mineralocorticoid receptor. In tissues that do not express the mineralocorticoid receptor, such as the placenta and testis, it protects cells from the growth-inhibiting and/or pro-apoptotic effects of cortisol, particularly during embryonic development. Mutations in this gene cause the syndrome of apparent mineralocorticoid excess and hypertension. [provided by RefSeq, Feb 2010]

HSD11B2 Gene-Disease associations (from GenCC):

apparent mineralocorticoid excess
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

HSD11B2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HSD11B2	NM_000196.4 link	c.664+15_664+16dupCC		intron_variant	Intron 3 of 4	ENST00000326152.6	NP_000187.3	P80365
HSD11B2	XM_047434048.1 link	c.352+15_352+16dupCC		intron_variant	Intron 4 of 5		XP_047290004.1

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
HSD11B2	ENST00000326152.6 link	c.664+7_664+8insCC	splice_region_variant, intron_variant	Intron 3 of 4	1	NM_000196.4	ENSP00000316786.5	P80365
HSD11B2	ENST00000567684.2 link	n.527+7_527+8insCC	splice_region_variant, intron_variant	Intron 3 of 3	3
HSD11B2	ENST00000566606.1 link	n.472_473insCC	downstream_gene_variant		5		ENSP00000473429.1	R4GN04

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000143

AC:

AN:

210458

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000319

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000560

AC:

AN:

1428848

Hom.:

Cov.:

AF XY:

0.00000281

AC XY:

AN XY:

711328

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

32778

American (AMR)

AF:

0.00

AC:

AN:

44110

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25604

East Asian (EAS)

AF:

0.00

AC:

AN:

38672

South Asian (SAS)

AF:

0.00

AC:

AN:

85258

European-Finnish (FIN)

AF:

0.000156

AC:

AN:

51260

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5588

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1086694

Other (OTH)

AF:

0.00

AC:

AN:

58884

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.00000000154567), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.281

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

-0.35

Splicing

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over