FMN2 p.Ser400=
c.1200C>T · rs760802198 · VCV713804
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00594%, nfe)
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 -0.009 | GERP 0.72, phastCons 0.85 |
| Overall | ||
| CADD | 9.002 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00594%
European (non-Finnish) · 70/1,178,420 alleles
Filtering AF
0.00479%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00439%
Overall
0.00447%
72/1,609,846 alleles · very rare
exomes 67/1,457,762 · genomes 5/152,084 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| European (non-Finnish)grpmax | 0.00594% | 16,835 |
| Remaining individualsnot grpmax-eligible | 0.00161% | 62,288 |
| African / African-American | 0.00134% | 74,384 |
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.Ser400=
- Coding
- c.1200C>T
- MANE Select
- NM_020066
- dbSNP
- rs760802198
- Type
- single nucleotide variant
- Location
- chr1:240093309 (GRCh38)
- Gene constraint
- LOEUF 0.51 · pLI 0.51 (gnomAD)
- Structure
- AlphaFold pLDDT 51.48 · 2 PDB
- Residue 400
- 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-ser400 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown