rs121908738

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP4

The NM_000022.4(ADA):c.821C>T(p.Pro274Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000118 in 1,614,218 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. P274P) has been classified as Likely benign.

Frequency

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

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

ADA
NM_000022.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts P:1U:4O:1

Conservation

PhyloP100: 2.41

Publications

7 publications found

Variant links:

Genes affected

ADA (HGNC:186): (adenosine deaminase) This gene encodes an enzyme that catalyzes the hydrolysis of adenosine to inosine in the purine catabolic pathway. Various mutations have been described for this gene and have been linked to human diseases related to impaired immune function such as severe combined immunodeficiency disease (SCID) which is the result of a deficiency in the ADA enzyme. In ADA-deficient individuals there is a marked depletion of T, B, and NK lymphocytes, and consequently, a lack of both humoral and cellular immunity. Conversely, elevated levels of this enzyme are associated with congenital hemolytic anemia. [provided by RefSeq, Sep 2019]

ADA links:

PKIG (HGNC:9019): (cAMP-dependent protein kinase inhibitor gamma) This gene encodes a member of the protein kinase inhibitor family. Studies of a similar protein in mice suggest that this protein acts as a potent competitive cAMP-dependent protein kinase inhibitor, and is a predominant form of inhibitor in various tissues. The encoded protein may be involved in osteogenesis. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

PKIG links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.3864654).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ADA	NM_000022.4 link	c.821C>T	p.Pro274Leu	missense_variant	Exon 9 of 12	ENST00000372874.9	NP_000013.2	P00813A0A0S2Z381
ADA	NM_001322051.2 link	c.749C>T	p.Pro250Leu	missense_variant	Exon 8 of 11		NP_001308980.1	F5GWI4
ADA	NM_001322050.2 link	c.416C>T	p.Pro139Leu	missense_variant	Exon 8 of 11		NP_001308979.1
ADA	NR_136160.2 link	n.872+217C>T		intron_variant	Intron 8 of 10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ADA	ENST00000372874.9 link	c.821C>T	p.Pro274Leu	missense_variant	Exon 9 of 12	1	NM_000022.4	ENSP00000361965.4	P00813
ADA	ENST00000695995.1 link	c.431C>T	p.Pro144Leu	missense_variant	Exon 6 of 9			ENSP00000512318.1	A0A8Q3SI64
ADA	ENST00000695991.1 link	c.359C>T	p.Pro120Leu	missense_variant	Exon 5 of 8			ENSP00000512314.1	A0A0S2Z3B9
ADA	ENST00000696038.1 link	n.*602+217C>T		intron_variant	Intron 7 of 8			ENSP00000512344.1	A0A8Q3SJ57

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000217

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

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:

0.0000438

AC:

AN:

251358

AF XY:

0.0000368

show subpopulations

Gnomad AFR exome

AF:

0.000308

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000616

AC:

AN:

1461888

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.0000896

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1112012

Other (OTH)

AF:

0.0000166

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000656

AC:

AN:

152330

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74506

show subpopulations

African (AFR)

AF:

0.000216

AC:

AN:

41574

American (AMR)

AF:

0.00

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.000193

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000302

ExAC

AF:

0.0000659

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:4Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Severe combined immunodeficiency, autosomal recessive, T cell-negative, B cell-negative, NK cell-negative, due to adenosine deaminase deficiency

Uncertain:4Other:1

Sep 05, 2021

Genome-Nilou Lab

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jul 24, 2017

Counsyl

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

UniProtKB/Swiss-Prot

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

- -

May 11, 2020

Natera, Inc.

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Oct 29, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 274 of the ADA protein (p.Pro274Leu). This variant is present in population databases (rs121908738, gnomAD 0.02%). This missense change has been observed in individual(s) with partial adenosine deaminase deficiency or suspected primary immunodeficiency (PMID: 2166947, 32888943, 36790564). ClinVar contains an entry for this variant (Variation ID: 1964). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt ADA protein function with a negative predictive value of 80%. Experimental studies are conflicting or provide insufficient evidence to determine the effect of this variant on ADA function (PMID: 2166947). 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. -

Partial adenosine deaminase deficiency

Pathogenic:1

Aug 01, 1990

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Uncertain

0.091

BayesDel_noAF

Pathogenic

0.20

CADD

Benign

(source)

DANN

Benign

0.86

DEOGEN2

Pathogenic

0.80

D;D

Eigen

Benign

-0.54

Eigen_PC

Benign

-0.47

FATHMM_MKL

Benign

0.69

LIST_S2

Benign

0.84

T;T

M_CAP

Uncertain

0.12

MetaRNN

Benign

0.39

T;T

MetaSVM

Uncertain

0.29

MutationAssessor

Benign

1.1

L;.

PhyloP100

2.4

PrimateAI

Benign

0.29

PROVEAN

Uncertain

-3.1

D;D

REVEL

Uncertain

0.62

Sift

Benign

0.35

T;T

Sift4G

Benign

0.43

T;T

Polyphen

0.0050

B;.

Vest4

0.51

MVP

0.87

MPC

0.16

ClinPred

0.049

GERP RS

4.2

Varity_R

0.40

gMVP

0.83

Mutation Taster

=18/82

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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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rs121908738

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