SKI p.Ala718=
c.2154G>A · rs778456446 · VCV1544550
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0443%, mid)
Conditions
1
Shprintzen-Goldberg syndrome
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 -2.1 | GERP -3.8 |
| Overall | ||
| CADD | 5.855 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0443%
Middle Eastern · 2/4,512 alleles
Filtering AF
0.00786%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0032%
Overall
0.000196%
3/1,530,534 alleles · ultra-rare
exomes 3/1,378,330 · genomes 0/152,204 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.0443% | 2,256 |
| European (non-Finnish) | 8.77e-05% | 1,140,854 |
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
- SKI
- Protein
- p.Ala718=
- Coding
- c.2154G>A
- MANE Select
- NM_003036
- dbSNP
- rs778456446
- Type
- single nucleotide variant
- Location
- chr1:2306732 (GRCh38)
- Gene constraint
- LOEUF 0.809 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
- Structure
- AlphaFold pLDDT 67.18 · 4 PDB
Similar variants
- SKI p.Ala718Gly Conflicting classifications of pathogenicity ★ ⚠ same residue
- SKI p.Ala718Val Likely benign ★ same residue
- SKI p.Ala718_Ter729= Uncertain significance ★ same residue
- SKI p.Gly116Glu Pathogenic/Likely pathogenic ★★ same condition
- SKI p.Gly117Arg Pathogenic/Likely pathogenic ★★ same condition
- SKI p.Gly117Ser Pathogenic/Likely pathogenic ★★ same condition
- SKI p.Gly34Cys Pathogenic ★★ ⚠ same condition
- SKI p.Gly34Ser Pathogenic/Likely pathogenic ★★ ⚠ same condition
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/ski-p-ala718 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown