CCBE1 c.654+4C>G
Uncertain significance
Single submitter
Classification
Uncertain significance
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00167%, amr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| Splice region | donor +4 | donor splice region (+4, within the first 6 intronic nt) · inside the BP7-excluded zone |
|---|---|---|
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP -6.2 | GERP -4.8 |
| Non-coding constraint | Z -1.35 | 1 kb window · o/e 1.09 · regional · uncalibrated |
| Overall | ||
| CADD | 0.011 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00167%
Admixed American · 1/60,010 alleles
Filtering AF
2.8e-05%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 1.1e-05%
Overall
0.00031%
5/1,613,146 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.00167% | 60,010 |
| African / African-American | 0.00133% | 74,910 |
| South Asian | 0.0011% | 91,078 |
| European (non-Finnish) | 0.00017% | 589,602 |
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
- CCBE1
- Coding
- c.654+4C>G
- MANE Select
- NM_133459
- dbSNP
- rs770958531
- Type
- single nucleotide variant
- Location
- chr18:59454847 (GRCh38)
- Gene constraint
- LOEUF 0.933 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
- Structure
- AlphaFold pLDDT 65.61
Similar variants
- CCBE1 p.Arg108Ter Pathogenic ★★ same type
- CCBE1 p.Arg118Ter Pathogenic/Likely pathogenic ★★ same type
- CCBE1 c.654+5G>C Uncertain significance ★★ same type
- CCBE1 c.*203A>G Uncertain significance ★★ same type
- CCBE1 c.*4173A>G Uncertain significance ★★ same type
- CCBE1 p.Ala28Val Uncertain significance ★★ ⚠ same type
- CCBE1 p.Ala322Val Uncertain significance ★★ ⚠ same type
- CCBE1 p.Ala96Gly 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/ccbe1-c-654-plus-4c-g (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown