NM_001282225.2:c.1465G>T

Variant names:

• chr22-17181554-C-A
• rs45497794
• NM_001282225.2:c.1465G>T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PVS1_Moderate PM2

The NM_001282225.2(ADA2):​c.1465G>T​(p.Glu489*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,194 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ADA2 NM_001282225.2 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.347
• Publications: 0 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0462 CDS is truncated, and there are 1 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001282225.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ADA2	NM_001282225.2	MANE Select	c.1465G>T	p.Glu489*	stop_gained	Exon 10 of 10	NP_001269154.1
	ADA2	NM_001282226.2		c.1465G>T	p.Glu489*	stop_gained	Exon 10 of 10	NP_001269155.1
	ADA2	NM_001282227.2		c.1339G>T	p.Glu447*	stop_gained	Exon 10 of 10	NP_001269156.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ADA2	ENST00000399837.8	TSL:1 MANE Select	c.1465G>T	p.Glu489*	stop_gained	Exon 10 of 10	ENSP00000382731.2
	ADA2	ENST00000262607.3	TSL:1	c.1465G>T	p.Glu489*	stop_gained	Exon 9 of 9	ENSP00000262607.2
	ADA2	ENST00000399839.5	TSL:5	c.1465G>T	p.Glu489*	stop_gained	Exon 10 of 10	ENSP00000382733.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460194 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 726514

African (AFR) AF: 0.00 AC: 0 AN: 33444

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39692

South Asian (SAS) AF: 0.00 AC: 0 AN: 86182

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5550

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1110742

Other (OTH) AF: 0.00 AC: 0 AN: 60316

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.26
CADD	Pathogenic	34
DANN	Benign	0.94
Eigen	Benign	0.037
Eigen_PC	Benign	-0.38
FATHMM_MKL	Benign	0.11	N
PhyloP100		0.35
Vest4		0.62
GERP RS		-0.69
Mutation Taster		=48/152	disease causing

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

Other links and lift over

dbSNP: rs45497794; hg19: chr22-17662444;