CFC1 p.Asn21=
c.63T>C · rs200918108 · VCV136732
Benign/Likely benign
Multiple submitters
Classification
Benign/Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 3 submitters
gnomAD v4.1
Common
common (popmax 9.12%, afr) — too common for a highly-penetrant pathogenic allele
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 0.25 | |
| Overall | ||
| CADD | 4.089 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
9.12%
African / African-American · 4,644/50,896 alleles
Filtering AF
8.91%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 8.82%
Overall
0.489%
5,454/1,116,138 alleles · common
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 9.12% | 11 |
| Admixed American | 0.745% | 134 |
| Remaining individualsnot grpmax-eligible | 0.639% | 157 |
| Middle Eastern | 0.377% | 265 |
| South Asian | 0.0216% | 4,633 |
| European (non-Finnish) | 0.0203% | 4,922 |
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
- CFC1
- Protein
- p.Asn21=
- Coding
- c.63T>C
- MANE Select
- NM_032545
- dbSNP
- rs200918108
- Type
- single nucleotide variant
- Location
- chr2:130598920 (GRCh38)
- Gene constraint
- LOEUF 0.586 · pLI 0.86 · ClinGen HI 0/3 (gnomAD)
- Structure
- AlphaFold pLDDT 64.18
Similar variants
- CFC1 p.Asn21His Benign ★★ same residue
- CFC1 p.Gly33Ser Uncertain significance ★★ ⚠ same type
- CFC1 p.Ala145Thr Benign ★★ same type
- CFC1 p.Arg47Gln Benign ★★ same type
- CFC1 p.Gly59Arg Likely benign ★★ same type
- CFC1 p.Leu202= Benign/Likely benign ★★ same type
- CFC1 p.Ala195Val Uncertain significance ★ ⚠ same type
- CFC1 p.Ala79Thr 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/cfc1-p-asn21 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown