rs4774518

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1_StrongPP5_Very_Strong

The NM_207581.4(DUOXA2):c.738C>G(p.Tyr246*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000411 in 1,603,982 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. Y246Y) has been classified as Benign.

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000039 ( 0 hom. )

Consequence

DUOXA2
NM_207581.4 stop_gained

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:7

Conservation

PhyloP100: -1.77

Publications

40 publications found

Variant links:

Genes affected

DUOXA2 (HGNC:32698): (dual oxidase maturation factor 2) This gene encodes an endoplasmic reticulum protein that is necessary for proper cellular localization and maturation of functional dual oxidase 2. Mutations in this gene have been associated with thyroid dyshormonogenesis 5.[provided by RefSeq, Feb 2010]

DUOXA2 links:

DUOXA1 (HGNC:26507): (dual oxidase maturation factor 1) Dual oxidases DUOX1 and DUOX2 are NADPH oxidases which are involved in hydrogen peroxide production necessary for thyroid hormonogenesis. They form a heterodimer with specific maturation factors DUOXA1 and DUOXA2, respectively, which is essential for the maturation and function of the DUOX enzyme complexes. This gene encodes the DUOX1 activator or maturation factor DUOXA1. Rat studies identified a bidirectional promoter which controls the transcription of the DUOX1 and DUOXA1 genes. This protein is cotransported to the cell surface when coexpressed with DUOX1 and is retained in the endoplasmic reticulum when expressed without DUOX1 protein. The expression of this gene or the DUOX1 gene is not suppressed by thyroglobulin (Tg), a macromolecular precursor in thyroid hormone synthesis, while the expression of the DUOX2 and DUOXA2 are significantly suppressed by the Tg. This protein is also a p53-regulated neurogenic factor involved in p53 dependent neuronal differentiation. Multiple alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2013]

DUOXA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. There are 5 pathogenic variants in the truncated region.

PP5

Variant 15-45117274-C-G is Pathogenic according to our data. Variant chr15-45117274-C-G is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 444.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DUOXA2	NM_207581.4 link	c.738C>G	p.Tyr246*	stop_gained	Exon 5 of 6	ENST00000323030.6	NP_997464.2	Q1HG44-1
DUOXA1	NM_001276266.2 link	c.*1832G>C		downstream_gene_variant		ENST00000560572.6	NP_001263195.1	Q1HG43-1B5M0B7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DUOXA2	ENST00000323030.6 link	c.738C>G	p.Tyr246*	stop_gained	Exon 5 of 6	1	NM_207581.4	ENSP00000319705.5		Q1HG44-1
DUOXA1	ENST00000560572.6 link	c.*1832G>C		downstream_gene_variant		1	NM_001276266.2	ENSP00000454084.1		Q1HG43-1

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152240

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00154

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000143

AC:

AN:

237622

AF XY:

0.000162

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00186

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000931

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000386

AC:

AN:

1451624

Hom.:

Cov.:

AF XY:

0.0000388

AC XY:

AN XY:

720768

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33332

American (AMR)

AF:

0.00

AC:

AN:

44270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25856

East Asian (EAS)

AF:

0.00114

AC:

AN:

39476

South Asian (SAS)

AF:

0.0000585

AC:

AN:

85482

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51108

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5678

European-Non Finnish (NFE)

AF:

0.00000181

AC:

AN:

1106520

Other (OTH)

AF:

0.0000668

AC:

AN:

59902

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.471

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

AF:

0.0000656

AC:

AN:

152358

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74498

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41594

American (AMR)

AF:

0.00

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00174

AC:

AN:

5174

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68036

Other (OTH)

AF:

0.000473

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.497

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000831

ExAC

AF:

0.000157

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Thyroglobulin synthesis defect

Pathogenic:5

Feb 01, 2008

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Mar 14, 2020

Genetics and Genomic Medicine Centre, NeuroGen Healthcare, NeuroGen Healthcare

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Juno Genomics, Hangzhou Juno Genomics, Inc

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PVS1_Strong+PM3_VeryStrong+PP4+PP1 -

Jan 15, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 11, 2023

3billion

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The variant is observed at an extremely low frequency in the gnomAD v2.1.1 dataset (total allele frequency: 0.014%). Predicted Consequence/Location: Stop-gained (nonsense): predicted to result in a loss or disruption of normal protein function through protein truncation. The predicted truncated protein may be shortened by more than 10%. Functional studies provide moderate evidence of the variant having a damaging effect on the gene or gene product (PMID: 18042646). The variant has been reported to be in trans with a pathogenic variant as either compound heterozygous or homozygous in at least 2 similarly affected unrelated individuals (PMID: 18042646, 23292166, 25675383, 30110704). The variant has been reported at least twice as pathogenic without evidence for the classification (ClinVar ID: VCV000000444 /PMID: 18042646). Therefore, this variant is classified as Pathogenic according to the recommendation of ACMG/AMP guideline. -

Inborn genetic diseases

Pathogenic:1

Aug 31, 2021

Ambry Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.738C>G (p.Y246*) alteration, located in exon 5 (coding exon 5) of the DUOXA2 gene, consists of a C to G substitution at nucleotide position 738. This changes the amino acid from a tyrosine (Y) to a stop codon at amino acid position 246. This alteration occurs at the 3' terminus of the DUOXA2 gene, is not expected to trigger nonsense-mediated mRNA decay, and only impacts the last 23.4% (75/320 amino acids) of the protein. However, premature stop codons are typically deleterious in nature and a significant portion of the protein is affected (Ambry internal data). This alteration has been reported in the homozygous state and in trans with a second DUOXA2 mutation in several patients with congenital hypothyroidism (Zamproni, 2008; Yi, 2013; Liu, 2015; Tanase-Nakao, 2018; Jung, 2020). In vitro studies showed reduced protein expression and inability to reconstitute DUOX2 activity, consistent with complete loss of function (Zamproni, 2008). Based on the available evidence, this alteration is classified as pathogenic. -

Familial thyroid dyshormonogenesis

Pathogenic:1

Sep 29, 2023

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:research

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Uncertain

0.14

BayesDel_noAF

Pathogenic

0.42

CADD

Benign

(source)

DANN

Uncertain

0.98

Eigen

Benign

-0.59

Eigen_PC

Benign

-0.95

FATHMM_MKL

Benign

0.46

PhyloP100

-1.8

Vest4

0.81

GERP RS

-2.3

Mutation Taster

=10/190

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over