TBCD p.Leu331=
c.993C>T · rs151316825 · VCV709952
Benign/Likely benign
Multiple submitters
Classification
Benign/Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 3 submitters
gnomAD v4.1
Rare
rare (popmax 0.524%, afr)
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 | GERP -3.7 |
| Overall | ||
| CADD | 0.445 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.524%
African / African-American · 393/75,006 alleles
Filtering AF
0.481%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.464%
Overall
0.0264%
426/1,612,660 alleles · rare
exomes 216/1,460,400 · genomes 210/152,260 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.524% | 191 |
| Admixed American | 0.0267% | 3,750 |
| Remaining individualsnot grpmax-eligible | 0.0208% | 4,803 |
| Middle Eastern | 0.0165% | 6,056 |
| East Asian | 0.00223% | 44,828 |
| South Asian | 0.0011% | 91,060 |
| European (non-Finnish) | 8.48e-05% | 1,178,796 |
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
- TBCD
- Protein
- p.Leu331=
- Coding
- c.993C>T
- MANE Select
- NM_005993
- dbSNP
- rs151316825
- Type
- single nucleotide variant
- Location
- chr17:82805917 (GRCh38)
- Gene constraint
- LOEUF 0.763 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 90.45 · 6 PDB
Similar variants
- TBCD p.Leu331Val Uncertain significance ★★ ⚠ same residue
- TBCD c.1224-2A>G Pathogenic/Likely pathogenic ★★ same type
- TBCD c.2007-2A>G Likely pathogenic ★★ same type
- TBCD p.Ala475Thr Pathogenic/Likely pathogenic ★★ same type
- TBCD p.Ala554Val Pathogenic/Likely pathogenic ★★ same type
- TBCD p.Arg113Ter Pathogenic/Likely pathogenic ★★ same type
- TBCD p.Arg303Ter Pathogenic/Likely pathogenic ★★ same type
- TBCD p.Arg323Ter Pathogenic/Likely 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/tbcd-p-leu331 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown