Is TPP2 p.Arg661= (c.1983G>A) pathogenic?

TPP2 p.Arg661= (c.1983G>A) is classified Likely benign in TPP2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-06-03). Ultra-rare (popmax 0.0164%, mid); Associated with Evans syndrome, immunodeficiency, and premature immunosenescence associated with tripeptidyl-peptidase II deficiency.

How common is TPP2 p.Arg661= (c.1983G>A) in the general population?

TPP2 p.Arg661= (c.1983G>A) is ultra-rare (popmax 0.0164%, mid) (gnomAD).

TPP2 p.Arg661=

Q: What condition is associated with TPP2 p.Arg661= (c.1983G>A)?

TPP2 p.Arg661= (c.1983G>A) is associated with Evans syndrome, immunodeficiency, and premature immunosenescence associated with tripeptidyl-peptidase II deficiency (ClinVar).

c.1983G>A · rs145016190 · VCV1660560

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0164%, mid)

Conditions

Evans syndrome, immunodeficiency, and premature immunosenescence associated with tripeptidyl-peptidase II deficiency

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 2.2	GERP 0.53, phastCons 1
Overall
CADD	10.79	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0164% Middle Eastern · 1/6,082 alleles

Filtering AF 0.00307% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00275%

Overall 0.00335% 54/1,613,474 alleles · ultra-rare exomes 53/1,461,384 · genomes 1/152,090 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0164%	6,082
Remaining individualsnot grpmax-eligible	0.00801%	12,490
European (non-Finnish)	0.00398%	25,101
East Asian	0.00223%	44,838

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: TPP2
Protein: p.Arg661=
Coding: c.1983G>A
MANE Select: NM_001330588
dbSNP: rs145016190
Type: single nucleotide variant
Location: chr13:102640339 (GRCh38)
Gene constraint: LOEUF 0.29 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 91.98

Full TPP2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Evans syndrome, immunodeficiency, and premature immunosenescence associated with tripeptidyl-peptidase II deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

TPP2 p.Ala619Thr Uncertain significance ★★ ⚠ same condition
TPP2 p.Ala648Asp Uncertain significance ★★ ⚠ same condition
TPP2 p.Arg1072Gln Uncertain significance ★★ ⚠ same condition
TPP2 p.Arg893Cys Uncertain significance ★★ ⚠ same condition
TPP2 p.Asn1192Ser Uncertain significance ★★ ⚠ same condition
TPP2 p.Asn1227Ser Uncertain significance ★★ ⚠ same condition
TPP2 p.Asp86His Uncertain significance ★★ ⚠ same condition
TPP2 p.Cys1231Tyr Uncertain significance ★★ ⚠ 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/tpp2-p-arg661 (accessed [today's date]).

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