IFT122 p.Pro406=
c.1218A>G · VCV4804419
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00223%, eas)
Conditions
1
cranioectodermal dysplasia 1
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.01 | strongly benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
| Constraint at this position | ||
| Conservation | phyloP -1.5 | GERP -2.1 |
| Overall | ||
| CADD | 7.389 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00223%
East Asian · 1/44,890 alleles
Overall
0.000124%
2/1,614,188 alleles · very rare
exomes 2/1,461,816 · genomes 0/152,372 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| East Asiangrpmax | 0.00223% | 44,890 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,510 |
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
- IFT122
- Protein
- p.Pro406=
- Coding
- c.1218A>G
- MANE Select
- NM_052989
- Type
- single nucleotide variant
- Location
- chr3:129478086 (GRCh38)
- Gene constraint
- LOEUF 0.811 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 82.91 · 5 PDB
Similar variants
- IFT122 c.1148-1G>C Pathogenic/Likely pathogenic ★★ same condition
- IFT122 c.272+1G>A Likely pathogenic ★★ same condition
- IFT122 c.273-257C>A Pathogenic/Likely pathogenic ★★ same condition
- IFT122 c.3265+1G>A Pathogenic/Likely pathogenic ★★ same condition
- IFT122 p.Arg1185Ter Pathogenic/Likely pathogenic ★★ same condition
- IFT122 p.Arg189Ter Pathogenic/Likely pathogenic ★★ same condition
- IFT122 p.Arg673Ter Pathogenic/Likely pathogenic ★★ same condition
- IFT122 p.Gln1005Ter 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/ift122-p-pro406 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown