CYFIP2 p.Ser1227=
c.3681C>T · rs771500468 · VCV1568338
Benign/Likely benign
Multiple submitters
Classification
Benign/Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0356%, eas)
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 -12 | GERP -3.9 |
| Overall | ||
| CADD | 1.418 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0356%
East Asian · 16/44,900 alleles
Filtering AF
0.0223%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0182%
Overall
0.00223%
36/1,613,834 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| East Asiangrpmax | 0.0356% | 2,806 |
| European (non-Finnish) | 0.00161% | 62,099 |
| African / African-American | 0.00134% | 74,896 |
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
- CYFIP2
- Protein
- p.Ser1227=
- Coding
- c.3681C>T
- MANE Select
- NM_001037333
- dbSNP
- rs771500468
- Type
- single nucleotide variant
- Location
- chr5:157392919 (GRCh38)
- Gene constraint
- LOEUF 0.274 · pLI 1.00 (gnomAD)
- Structure
- AlphaFold pLDDT 87.28
Similar variants
- CYFIP2 p.Ser1227Ala Uncertain significance ★ ⚠ same residue
- CYFIP2 p.Arg87Cys Pathogenic/Likely pathogenic ★★ same type
- CYFIP2 p.Arg87Pro Pathogenic/Likely pathogenic ★★ same type
- CYFIP2 p.Glu640Lys Pathogenic ★★ same type
- CYFIP2 p.Tyr108His Likely pathogenic ★★ ⚠ same type
- CYFIP2 p.Ala1074Thr Uncertain significance ★★ ⚠ same type
- CYFIP2 p.Ala773Thr Uncertain significance ★★ ⚠ same type
- CYFIP2 p.Ala80Val 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/cyfip2-p-ser1227 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown