TTPA p.Pro22=
c.66G>T · VCV3704758
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.000262%, nfe)
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 -0.37 | GERP -1.1, phastCons 0.13 |
| Overall | ||
| CADD | 12.58 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.000262%
European (non-Finnish) · 3/1,144,762 alleles
Filtering AF
7e-05%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 1.9e-05%
Overall
0.000197%
3/1,525,574 alleles · very rare
exomes 1/1,373,524 · genomes 2/152,050 · joint denominator
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
- TTPA
- Protein
- p.Pro22=
- Coding
- c.66G>T
- MANE Select
- NM_000370
- Type
- single nucleotide variant
- Location
- chr8:63085956 (GRCh38)
- Gene constraint
- LOEUF 1.276 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 94.44 · 6 PDB
- Residue 22
- an α-helix
Similar variants
- TTPA p.Pro22fs Likely pathogenic ★ same residue
- TTPA c.205-1G>C Pathogenic ★★ same type
- TTPA c.205-2A>G Pathogenic/Likely pathogenic ★★ same type
- TTPA c.553-1G>T Pathogenic ★★ same type
- TTPA c.663+1G>A Pathogenic/Likely pathogenic ★★ same type
- TTPA p.Ala120Thr Pathogenic/Likely pathogenic ★★ ⚠ same type
- TTPA p.Ala58Asp Likely pathogenic ★★ same type
- TTPA p.Arg134Ter Pathogenic ★★ same type
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/ttpa-p-pro22 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown