FCSK p.Ser56=
c.168C>T · rs201023038 · VCV1909468
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.0117%, amr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP -9.2 | GERP -2.8 |
| Overall | ||
| CADD | 2.384 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0117%
Admixed American · 7/59,994 alleles
Filtering AF
0.00543%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0038%
Overall
0.00105%
17/1,612,662 alleles · ultra-rare
exomes 16/1,460,540 · genomes 1/152,122 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.0117% | 8,571 |
| African / African-American | 0.00134% | 74,850 |
| European (non-Finnish) | 0.000763% | 131,110 |
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
- FCSK
- Protein
- p.Ser56=
- Coding
- c.168C>T
- MANE Select
- NM_145059
- dbSNP
- rs201023038
- Type
- single nucleotide variant
- Location
- chr16:70463708 (GRCh38)
- Gene constraint
- LOEUF 1.254 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 92.20
Similar variants
- FCSK p.Ser56Arg Uncertain significance ★ ⚠ same residue
- FCSK c.412-2A>G Likely pathogenic ★★ same type
- FCSK c.485-2A>G Uncertain significance ★★ same type
- FCSK p.Ala297Val Uncertain significance ★★ ⚠ same type
- FCSK p.Ala348Ser Uncertain significance ★★ ⚠ same type
- FCSK p.Ala481Thr Uncertain significance ★★ ⚠ same type
- FCSK p.Ala488Thr Uncertain significance ★★ same type
- FCSK p.Ala518Val 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/fcsk-p-ser56 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown