Is TPP2 p.Cys844Arg (c.2530T>C) pathogenic?

TPP2 p.Cys844Arg (c.2530T>C) is classified Uncertain significance in TPP2 (ClinVar, Single submitter, 1 submitter; last evaluated 2019-12-04). AlphaMissense: likely pathogenic (0.9547); Absent from gnomAD v4.1; Associated with Evans syndrome, immunodeficiency, and premature immunosenescence associated with tripeptidyl-peptidase II deficiency.

How common is TPP2 p.Cys844Arg (c.2530T>C) in the general population?

TPP2 p.Cys844Arg (c.2530T>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about TPP2 p.Cys844Arg (c.2530T>C)?

AlphaMissense predicts likely pathogenic (score 0.9547) — an in-silico prediction, not a clinical call.

TPP2 p.Cys844Arg

Q: What condition is associated with TPP2 p.Cys844Arg (c.2530T>C)?

TPP2 p.Cys844Arg (c.2530T>C) is associated with Evans syndrome, immunodeficiency, and premature immunosenescence associated with tripeptidyl-peptidase II deficiency (ClinVar).

c.2530T>C · rs1883170944 · VCV850697

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9547 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

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

Computational evidence

Protein change
AlphaMissense	0.9547	likely pathogenic
REVEL	0.341	indeterminate
SaProt	LLR -6.72	tolerated
⇒ AlphaMissense calls this damaging; SaProt does not; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.9	GERP 2.5, phastCons 1
Regional constraint	o/e 0.16	constrained · MANE · 68 bp · p 3.5e-05 · regional, not allelic
Overall
CADD	26.0	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: TPP2
Protein: p.Cys844Arg
Coding: c.2530T>C
MANE Select: NM_001330588
dbSNP: rs1883170944
Type: single nucleotide variant
Location: chr13:102647246 (GRCh38)
Gene constraint: LOEUF 0.29 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 91.98
Residue 844: a UniProt-annotated variant site (in imd78; loss of expression)

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-cys844arg (accessed [today's date]).

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