FMN2 p.Ser177=
c.531G>A · rs148480631 · VCV435214
Benign/Likely benign
Multiple submitters
Classification
Benign/Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 6 submitters
gnomAD v4.1
Rare
rare (popmax 0.979%, 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 -0.035 | GERP -1.8, phastCons 0.35 |
| Overall | ||
| CADD | 8.896 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.979%
African / African-American · 735/75,048 alleles
Filtering AF
0.921%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.897%
Overall
0.0631%
1,018/1,614,104 alleles · rare
exomes 592/1,461,806 · genomes 426/152,298 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.979% | 102 |
| Remaining individualsnot grpmax-eligible | 0.0864% | 1,157 |
| South Asian | 0.0626% | 1,598 |
| Admixed American | 0.0566% | 1,766 |
| Finnishnot grpmax-eligible | 0.0266% | 3,764 |
| European (non-Finnish) | 0.0103% | 9,752 |
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.Ser177=
- Coding
- c.531G>A
- MANE Select
- NM_020066
- dbSNP
- rs148480631
- Type
- single nucleotide variant
- Location
- chr1:240092640 (GRCh38)
- Gene constraint
- LOEUF 0.51 · pLI 0.51 (gnomAD)
- Structure
- AlphaFold pLDDT 51.48 · 2 PDB
- Residue 177
- the 'disordered' region
Similar variants
- 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
- FMN2 p.Gly244Ala 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-ser177 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown