CCDC33 p.Arg668Trp
c.2002C>T · rs768822161 · VCV2391673
Uncertain significance
Single submitter
Classification
Uncertain significance
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
ultra-rare (popmax 0.0434%, amr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.242 | benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP 2.6 | GERP 1.7, phastCons 1 |
| Regional constraint | o/e 1.00 | unconstrained · MANE · 99 kb · p 0.88 · regional, not allelic |
| Overall | ||
| CADD | 29.3 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0434%
Admixed American · 26/59,974 alleles
Filtering AF
0.0303%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.026%
Overall
0.00242%
39/1,613,426 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.0434% | 2,307 |
| East Asian | 0.00223% | 44,868 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,456 |
| European (non-Finnish) | 0.000932% | 107,240 |
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
- CCDC33
- Protein
- p.Arg668Trp
- Coding
- c.2002C>T
- MANE Select
- NM_025055
- dbSNP
- rs768822161
- Type
- single nucleotide variant
- Location
- chr15:74333944 (GRCh38)
- Gene constraint
- LOEUF 1.17 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 72.34
Similar variants
- CCDC33 p.Pro610Leu Likely benign ★★ same type
- STRA6 c.96+1744C>G Benign ★★ same type
- STRA6 c.-15-751T>G Benign ★★ same type
- STRA6 c.-16+1061C>G Likely benign ★★ same type
- STRA6 c.-16+1161G>A Benign ★★ same type
- STRA6 c.-16+794G>C Benign ★★ same type
- STRA6 c.-5200G>A Benign ★★ same type
- STRA6 p.Trp15Ter Likely pathogenic ★ 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/ccdc33-p-arg668trp (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown