chr22-17181552-C-G

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP4_ModerateBP6

The NM_001282225.2(ADA2):c.1467G>C(p.Glu489Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000917 in 1,612,710 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E489Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00051 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00096 ( 1 hom. )

Consequence

ADA2
NM_001282225.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:2

Conservation

PhyloP100: 0.394

Publications

2 publications found

Variant links:

Genes affected

ADA2 (HGNC:1839): (adenosine deaminase 2) This gene encodes a member of a subfamily of the adenosine deaminase protein family. The encoded protein is one of two adenosine deaminases found in humans, which regulate levels of the signaling molecule, adenosine. The encoded protein is secreted from monocytes undergoing differentiation and may regulate cell proliferation and differentiation. This gene may be responsible for some of the phenotypic features associated with cat eye syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2013]

ADA2 Gene-Disease associations (from GenCC):

deficiency of adenosine deaminase 2
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
vasculitis due to ADA2 deficiency
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet, Labcorp Genetics (formerly Invitae)
polyarteritis nodosa
Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
Sneddon syndrome
Inheritance: AR, AD Classification: MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet
Diamond-Blackfan anemia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ADA2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.10696912).

BP6

Variant 22-17181552-C-G is Benign according to our data. Variant chr22-17181552-C-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 569098.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ADA2	NM_001282225.2 link	c.1467G>C	p.Glu489Asp	missense_variant	Exon 10 of 10	ENST00000399837.8	NP_001269154.1	Q9NZK5-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ADA2	ENST00000399837.8 link	c.1467G>C	p.Glu489Asp	missense_variant	Exon 10 of 10	1	NM_001282225.2	ENSP00000382731.2		Q9NZK5-1

Frequencies

GnomAD3 genomes

AF:

0.000506

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000217

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

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:

0.000955

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000398

AC:

100

AN:

251338

AF XY:

0.000397

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.000774

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000960

AC:

1402

AN:

1460508

Hom.:

Cov.:

AF XY:

0.000921

AC XY:

669

AN XY:

726644

show subpopulations

African (AFR)

AF:

0.0000598

AC:

AN:

33444

American (AMR)

AF:

0.0000447

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86216

European-Finnish (FIN)

AF:

0.0000562

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.000179

AC:

AN:

5586

European-Non Finnish (NFE)

AF:

0.00122

AC:

1357

AN:

1110972

Other (OTH)

AF:

0.000530

AC:

AN:

60328

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

112

168

224

280

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

116

174

232

290

<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:

0.000506

AC:

AN:

152202

Hom.:

Cov.:

AF XY:

0.000309

AC XY:

AN XY:

74360

show subpopulations

African (AFR)

AF:

0.000217

AC:

AN:

41454

American (AMR)

AF:

0.000196

AC:

AN:

15272

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5204

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000955

AC:

AN:

68038

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.510

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:

0.000650

Hom.:

Bravo

AF:

0.000487

TwinsUK

AF:

0.00162

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000581

AC:

ExAC

AF:

0.000247

AC:

EpiCase

AF:

0.000763

EpiControl

AF:

0.000889

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 11, 2022

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

DNA sequence analysis of the ADA2 gene demonstrated a sequence change, c.1467G>C, in exon 10 that results in an amino acid change, p.Glu489Asp. This sequence change does not appear to have been previously described in individuals with ADA2-related disorders. This sequence change has been described in the gnomAD database with a frequency of 0.075% in the European subpopulation (dbSNP rs61738625). The p.Glu489Asp change affects a poorly conserved amino acid residue located in a domain of the ADA2 protein that is known to be functional. The p.Glu489Asp substitution appears to be benign using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). Due to insufficient evidences and the lack of functional studies, the clinical significance of the p.Glu489Asp change remains unknown at this time. -

Vasculitis due to ADA2 deficiency

Uncertain:1

Jan 22, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glutamic acid, which is acidic and polar, with aspartic acid, which is acidic and polar, at codon 489 of the ADA2 protein (p.Glu489Asp). This variant is present in population databases (rs61738625, gnomAD 0.07%). This variant has not been reported in the literature in individuals affected with ADA2-related conditions. ClinVar contains an entry for this variant (Variation ID: 569098). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The aspartic acid amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Autoinflammatory syndrome

Uncertain:1

Jan 22, 2021

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sneddon syndrome;C3887654:Vasculitis due to ADA2 deficiency

Benign:1

Mar 12, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:1

Oct 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

ADA2: BP4 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.43

CADD

Benign

2.9

(source)

DANN

Benign

0.94

DEOGEN2

Benign

0.047

T;T;T;.;T;T;.;.

Eigen

Benign

-0.83

Eigen_PC

Benign

-0.91

FATHMM_MKL

Benign

0.072

LIST_S2

Benign

0.39

T;.;.;T;.;T;.;T

M_CAP

Benign

0.079

MetaRNN

Benign

0.11

T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.65

PhyloP100

0.39

PrimateAI

Benign

0.26

PROVEAN

Benign

-2.3

.;N;N;N;N;.;N;.

REVEL

Benign

0.15

Sift

Benign

0.14

.;T;T;T;T;.;T;.

Sift4G

Benign

0.085

T;T;T;D;T;.;T;.

Polyphen

0.0020, 0.024

.;B;B;B;B;B;.;.

Vest4

0.036

MutPred

0.60

.;Gain of helix (P = 0.0199);Gain of helix (P = 0.0199);.;Gain of helix (P = 0.0199);Gain of helix (P = 0.0199);.;.;

MVP

0.62

MPC

0.049

ClinPred

0.015

GERP RS

1.3

Varity_R

0.19

gMVP

0.24

Mutation Taster

=87/13

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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