OPA1 p.Ser256Arg
c.768C>G · rs751010108 · VCV2734610
Likely pathogenic
Single submitter
Classification
Likely pathogenic
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00017%, nfe)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.417 | indeterminate |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Pangolin | Δ0.79 | gain · loss 0.62 · not in the SpliceAI release · independent |
| Constraint at this position | ||
| Conservation | phyloP 7.7 | GERP 1.4, phastCons 1 |
| Overall | ||
| CADD | 28.5 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00017%
European (non-Finnish) · 2/1,179,786 alleles
Filtering AF
2.8e-05%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 1.1e-05%
Overall
0.000124%
2/1,613,900 alleles · very rare
exomes 2/1,461,584 · genomes 0/152,316 · 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
- OPA1
- Protein
- p.Ser256Arg
- Coding
- c.768C>G
- MANE Select
- NM_130837
- dbSNP
- rs751010108
- Type
- single nucleotide variant
- Location
- chr3:193626181 (GRCh38)
- Gene constraint
- LOEUF 0.503 · pLI 0.92 (gnomAD)
- Structure
- AlphaFold pLDDT 74.02 · 11 PDB
Similar variants
- OPA1 p.Ser256= Likely benign ★ 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-ser256arg (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown