OPA1 p.Ala773=
c.2319G>A · rs144690080 · VCV1198877
Benign/Likely benign
Multiple submitters
Classification
Benign/Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 3 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0164%, 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 -1.5 | GERP -4.2 |
| Overall | ||
| CADD | 11.33 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0164%
Middle Eastern · 1/6,080 alleles
Filtering AF
0.00347%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00229%
Overall
0.00229%
37/1,613,770 alleles · ultra-rare
exomes 27/1,461,632 · genomes 10/152,138 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.0164% | 6,080 |
| African / African-American | 0.00801% | 12,485 |
| European (non-Finnish) | 0.00229% | 43,699 |
| Admixed American | 0.00167% | 59,990 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,466 |
| South Asian | 0.0011% | 91,070 |
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
- OPA1
- Protein
- p.Ala773=
- Coding
- c.2319G>A
- MANE Select
- NM_130837
- dbSNP
- rs144690080
- Type
- single nucleotide variant
- Location
- chr3:193657220 (GRCh38)
- Gene constraint
- LOEUF 0.503 · pLI 0.92 (gnomAD)
- Structure
- AlphaFold pLDDT 74.02 · 11 PDB
- Residue 773
- the 'stalk region' region; the 'paddle region' region
Similar variants
- OPA1 p.Ala773Val Uncertain significance ★★ ⚠ same residue
- OPA1 c.1035+1G>A Pathogenic ★★ same type
- OPA1 c.1035+5G>A Pathogenic/Likely pathogenic ★★ same type
- OPA1 c.1149+1G>A Pathogenic ★★ same type
- OPA1 c.1149+1G>T Likely pathogenic ★★ same type
- OPA1 c.1150-2A>G Pathogenic ★★ same type
- OPA1 c.1230+1G>A Pathogenic ★★ same type
- OPA1 c.1230+5G>A 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/opa1-p-ala773 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown