Is ADA2 p.Tyr236= (c.708C>T) pathogenic?

ADA2 p.Tyr236= (c.708C>T) is classified Likely benign in ADA2 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2026-04-01). Ultra-rare (popmax 0.1%, amr); Associated with deficiency of adenosine deaminase 2.

What condition is associated with ADA2 p.Tyr236= (c.708C>T)?

ADA2 p.Tyr236= (c.708C>T) is associated with deficiency of adenosine deaminase 2 (ClinVar).

How common is ADA2 p.Tyr236= (c.708C>T) in the general population?

ADA2 p.Tyr236= (c.708C>T) is ultra-rare (popmax 0.1%, amr) (gnomAD).

How is Deficiency of adenosine deaminase 2 inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

ADA2 p.Tyr236=

c.708C>T · rs200287863 · VCV715290

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.1%, amr)

Conditions

deficiency of adenosine deaminase 2

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -1.3	GERP -1.8
Overall
CADD	4.425	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.1% Admixed American · 60/60,012 alleles

Filtering AF 0.0797% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0724%

Overall 0.00601% 97/1,613,510 alleles · ultra-rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.1%	1,000
East Asian	0.00891%	11,220
African / African-American	0.00267%	37,523
European (non-Finnish)	0.00237%	42,143
South Asian	0.0022%	45,528
Remaining individualsnot grpmax-eligible	0.0016%	62,434

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: ADA2
Protein: p.Tyr236=
Coding: c.708C>T
MANE Select: NM_001166105 · reported on NM_001282225
dbSNP: rs200287863
Type: single nucleotide variant
Location: chr22:17203608 (GRCh38)
Structure: AlphaFold pLDDT 85.04 · 1 PDB

Full ADA2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

deficiency of adenosine deaminase 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Deficiency of adenosine deaminase 2 (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood, Infancy
Prevalence: <1 / 1 000 000 (Worldwide)

Similar variants

ADA2 p.Tyr236Cys Uncertain significance ★★ ⚠ same residue
ADA2 c.754-2A>G Likely pathogenic ★★ same condition
ADA2 c.882-2A>G Pathogenic ★★ same condition
ADA2 c.973-2A>G Pathogenic ★★ same condition
ADA2 p.Arg169Gln Pathogenic/Likely pathogenic ★★ same condition
ADA2 p.Arg169Trp Pathogenic/Likely pathogenic ★★ same condition
ADA2 p.Arg306Ter Likely pathogenic ★★ same condition
ADA2 p.Arg312Ter Pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/ada2-p-tyr236 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown