rs1057519069

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM2PP3_StrongPP5_Moderate

The NM_001368143.2(CYP21A2):​c.-29C>G variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

Frequency

Genomes: not found (cov: 31)

Consequence

CYP21A2
NM_001368143.2 5_prime_UTR_premature_start_codon_gain

Scores

3
2
2

Clinical Significance

Pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 2.26
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]

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
PP3
BayesDel_addAF computational evidence supports a deleterious effect, 0.575
PP5
Variant 6-32039178-C-G is Pathogenic according to our data. Variant chr6-32039178-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 375321.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr6-32039178-C-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
CYP21A2NM_000500.9 linkc.377C>G p.Ser126* stop_gained 3/10 ENST00000644719.2 NP_000491.4 P08686Q16874Q08AG9

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
CYP21A2ENST00000644719.2 linkc.377C>G p.Ser126* stop_gained 3/10 NM_000500.9 ENSP00000496625.1 Q16874

Frequencies

GnomAD3 genomes
Cov.:
31
GnomAD4 exome
Cov.:
77
GnomAD4 genome
Cov.:
31

ClinVar

Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

not provided Pathogenic:1
Pathogenic, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpJun 16, 2021The frequency data for this variant in the population databases (ExAC) is considered unreliable due to the presence of homologous sequence, such as pseudogenes or paralogs, in the genome. For these reasons, this variant has been classified as Pathogenic. Loss-of-function variants in CYP21A2 are known to be pathogenic (PMID: 10857554). This variant has been observed in individuals with classic salt-wasting congenital adrenal hyperplasia due to 21-hydroxylase deficiency (PMID: 30048636, 31446012). ClinVar contains an entry for this variant (Variation ID: 375321). This sequence change creates a premature translational stop signal (p.Ser126*) in the CYP21A2 gene. It is expected to result in an absent or disrupted protein product. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
0.57
D
BayesDel_noAF
Pathogenic
0.59
CADD
Pathogenic
35
DANN
Uncertain
1.0
Eigen
Pathogenic
0.84
Eigen_PC
Uncertain
0.63
FATHMM_MKL
Benign
0.63
D
Vest4
0.89
GERP RS
4.8

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

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

Other links and lift over

dbSNP: rs1057519069; hg19: chr6-32006955; API