ALAD p.Ala291=
c.873C>T · rs200378521 · VCV1576829
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
rare (popmax 0.132%, mid)
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 -7.4 | GERP -3.9 |
| Overall | ||
| CADD | 1.052 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.132%
Middle Eastern · 8/6,062 alleles
Filtering AF
0.0656%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0478%
Overall
0.00186%
30/1,613,868 alleles · rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.132% | 758 |
| Admixed American | 0.00666% | 15,006 |
| South Asian | 0.00329% | 30,360 |
| African / African-American | 0.00266% | 37,529 |
| East Asian | 0.00223% | 44,886 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,510 |
| European (non-Finnish) | 0.000932% | 107,276 |
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
- ALAD
- Protein
- p.Ala291=
- Coding
- c.873C>T
- MANE Select
- NM_000031
- dbSNP
- rs200378521
- Type
- single nucleotide variant
- Location
- chr9:113389035 (GRCh38)
- Gene constraint
- LOEUF 0.63 · pLI 0.10 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
- Structure
- AlphaFold pLDDT 96.34 · 4 PDB
Similar variants
- ALAD p.Gly133Arg Likely pathogenic ★★ same type
- ALAD c.*127C>T Uncertain significance ★★ same type
- ALAD c.*363G>A Uncertain significance ★★ same type
- ALAD p.Ala93Thr Uncertain significance ★★ ⚠ same type
- ALAD p.Arg147Cys Uncertain significance ★★ ⚠ same type
- ALAD p.Arg174His Uncertain significance ★★ ⚠ same type
- ALAD p.Arg17Gln Uncertain significance ★★ ⚠ same type
- ALAD p.Arg222Cys 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/alad-p-ala291 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown