FMN2 p.Pro1121=
c.3363T>G · rs200682272 · VCV3052004
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
rare (popmax 0.32%, sas)
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 -20 | GERP -1.8 |
| Overall | ||
| CADD | 0.37 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.32%
South Asian · 70/21,898 alleles
Filtering AF
0.259%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.237%
Overall
0.0898%
353/393,168 alleles · rare
exomes 350/384,920 · genomes 3/8,248 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| South Asiangrpmax | 0.32% | 313 |
| Remaining individualsnot grpmax-eligible | 0.158% | 631 |
| Ashkenazi Jewishnot grpmax-eligible | 0.145% | 691 |
| Middle Eastern | 0.136% | 738 |
| Finnishnot grpmax-eligible | 0.105% | 949 |
| African / African-American | 0.103% | 970 |
| Admixed American | 0.097% | 1,031 |
| European (non-Finnish) | 0.0673% | 1,486 |
| East Asian | 0.0532% | 1,881 |
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.Pro1121=
- Coding
- c.3363T>G
- MANE Select
- NM_020066
- dbSNP
- rs200682272
- Type
- single nucleotide variant
- Location
- chr1:240208175 (GRCh38)
- Gene constraint
- LOEUF 0.51 · pLI 0.51 (gnomAD)
- Structure
- AlphaFold pLDDT 51.48 · 2 PDB
- Residue 1121
- the fh1 domain; 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-pro1121 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown