TRRAP p.Ala1557=
c.4671G>A · rs147905152 · VCV2055184
Benign
Single submitter
Classification
Benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0303%, nfe)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal. | ||
| REVEL | 0.003 | strongly benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | Δ0.35 | acceptor gain · deltas |
| Constraint at this position | ||
| Conservation | phyloP -6.4 | GERP -3.8 |
| Overall | ||
| CADD | 0.353 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0303%
European (non-Finnish) · 358/1,180,048 alleles
Filtering AF
0.0277%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0267%
Overall
0.0237%
383/1,614,048 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| European (non-Finnish)grpmax | 0.0303% | 3,296 |
| Remaining individualsnot grpmax-eligible | 0.024% | 4,166 |
| African / African-American | 0.00667% | 14,982 |
| Admixed American | 0.00333% | 30,001 |
| East Asian | 0.00223% | 44,894 |
| Finnishnot grpmax-eligible | 0.00156% | 64,026 |
| South Asian | 0.0011% | 91,082 |
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
- TRRAP
- Protein
- p.Ala1557=
- Coding
- c.4671G>A
- MANE Select
- NM_001375524
- dbSNP
- rs147905152
- Type
- single nucleotide variant
- Location
- chr7:98948568 (GRCh38)
- Gene constraint
- LOEUF 0.115 · pLI 1.00 · ClinGen HI 1/3 (gnomAD)
- Residue 1557
- an α-helix
Similar variants
- TRRAP p.Arg1035Gln Pathogenic/Likely pathogenic ★★ same type
- TRRAP p.Glu1104Gly Pathogenic/Likely pathogenic ★★ same type
- TRRAP p.Glu1106Lys Likely pathogenic ★★ same type
- TRRAP p.Met3318Val Pathogenic/Likely pathogenic ★★ same type
- TRRAP p.Val1030Ile Likely pathogenic ★★ same type
- TRRAP c.2622+3A>G Uncertain significance ★★ same type
- TRRAP c.7176+4A>G Uncertain significance ★★ same type
- TRRAP c.8247+5G>T Uncertain significance ★★ 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/trrap-p-ala1557 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown