FMN2 p.Ala918=
c.2754G>A · VCV4533756
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.0331%, mid)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP -0.54 | GERP -2.4 |
| Overall | ||
| CADD | 3.036 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0331%
Middle Eastern · 2/6,044 alleles
Filtering AF
0.00583%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00268%
Overall
0.00381%
61/1,602,632 alleles · ultra-rare
exomes 59/1,457,674 · genomes 2/144,958 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.0331% | 3,022 |
| African / African-American | 0.00579% | 17,267 |
| Remaining individualsnot grpmax-eligible | 0.00483% | 20,720 |
| European (non-Finnish) | 0.00391% | 25,593 |
| Admixed American | 0.00338% | 29,547 |
| South Asian | 0.00331% | 30,190 |
| East Asian | 0.00225% | 44,412 |
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
- FMN2
- Protein
- p.Ala918=
- Coding
- c.2754G>A
- MANE Select
- NM_020066
- Type
- single nucleotide variant
- Location
- chr1:240207566 (GRCh38)
- Gene constraint
- LOEUF 0.51 · pLI 0.51 (gnomAD)
- Structure
- AlphaFold pLDDT 51.48 · 2 PDB
- Residue 918
- the fh1 domain; the 'disordered' region
Similar variants
- FMN2 p.Ala918Val Uncertain significance ★ ⚠ same residue
- FMN2 p.Ile183Phe Likely pathogenic ★★ ⚠ same type
- FMN2 p.Ala1691Val Uncertain significance ★★ ⚠ same type
- FMN2 p.Ala367Val Uncertain significance ★★ ⚠ same type
- FMN2 p.Ala508Val Uncertain significance ★★ ⚠ same type
- FMN2 p.Asp352Tyr Uncertain significance ★★ ⚠ same type
- FMN2 p.Gln192Leu Uncertain significance ★★ ⚠ same type
- FMN2 p.Gln210Arg 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/fmn2-p-ala918 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown