rs750499484

Variant names:

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PVS1

The NM_000500.9(CYP21A2):c.740delA(p.Glu247GlyfsTer11) variant causes a frameshift, splice region change involving the alteration of a non-conserved nucleotide. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.0 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CYP21A2
NM_000500.9 frameshift, splice_region

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.57

Publications

4 publications found

Variant links:

Genes affected

CYP21A2 (HGNC:2600): (cytochrome P450 family 21 subfamily A member 2) This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and hydroxylates steroids at the 21 position. Its activity is required for the synthesis of steroid hormones including cortisol and aldosterone. Mutations in this gene cause congenital adrenal hyperplasia. A related pseudogene is located near this gene; gene conversion events involving the functional gene and the pseudogene are thought to account for many cases of steroid 21-hydroxylase deficiency. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

CYP21A2 Gene-Disease associations (from GenCC):

classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Myriad Women’s Health, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine
classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency, salt wasting form
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency, simple virilizing form
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CYP21A2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYP21A2	NM_000500.9 link	c.740delA	p.Glu247GlyfsTer11	frameshift_variant, splice_region_variant	Exon 7 of 10	ENST00000644719.2	NP_000491.4	P08686Q16874Q08AG9
CYP21A2	NM_001128590.4 link	c.650delA	p.Glu217GlyfsTer11	frameshift_variant, splice_region_variant	Exon 6 of 9		NP_001122062.3	P08686Q08AG9
CYP21A2	NM_001368143.2 link	c.335delA	p.Glu112GlyfsTer11	frameshift_variant, splice_region_variant	Exon 7 of 10		NP_001355072.1
CYP21A2	NM_001368144.2 link	c.335delA	p.Glu112GlyfsTer11	frameshift_variant, splice_region_variant	Exon 6 of 9		NP_001355073.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYP21A2	ENST00000644719.2 link	c.740delA	p.Glu247GlyfsTer11	frameshift_variant, splice_region_variant	Exon 7 of 10		NM_000500.9	ENSP00000496625.1		Q16874

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

151836

Hom.:

Cov.:

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

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:

0.00000402

AC:

AN:

248470

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:

0.0000546

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000480

AC:

AN:

1458374

Hom.:

Cov.:

AF XY:

0.00000414

AC XY:

AN XY:

725434

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:

33390

American (AMR)

AF:

0.0000449

AC:

AN:

44502

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26096

East Asian (EAS)

AF:

0.000127

AC:

AN:

39400

South Asian (SAS)

AF:

0.00

AC:

AN:

85934

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52528

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5456

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1110830

Other (OTH)

AF:

0.00

AC:

AN:

60238

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.0000122004), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.311

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

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

151952

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74254

African (AFR)

AF:

0.00

AC:

AN:

41468

American (AMR)

AF:

0.00

AC:

AN:

15250

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3464

East Asian (EAS)

AF:

0.00

AC:

AN:

5084

South Asian (SAS)

AF:

0.00

AC:

AN:

4808

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10596

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67978

Other (OTH)

AF:

0.00

AC:

AN:

2100

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency

Uncertain:1

Mar 18, 2016

Soonchunhyang University Bucheon Hospital, Soonchunhyang University Medical Center

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:reference population

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

1.6

Mutation Taster

=3/197

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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