C8A c.855+11A>G
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00668%, amr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| Splice region | donor +11 | near-intronic (+11 nt from the splice site) |
|---|---|---|
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP 0.39 | GERP -1.2 |
| Non-coding constraint | Z 0.94 | 1 kb window · o/e 0.93 · regional · uncalibrated |
| Overall | ||
| CADD | 15.23 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00668%
Admixed American · 4/59,882 alleles
Filtering AF
0.00226%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00135%
Overall
0.000498%
8/1,606,586 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.00668% | 14,971 |
| European (non-Finnish) | 0.000341% | 293,438 |
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
- C8A
- Coding
- c.855+11A>G
- MANE Select
- NM_000562
- Type
- single nucleotide variant
- Location
- chr1:56883692 (GRCh38)
- Gene constraint
- LOEUF 1.168 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 79.58 · 11 PDB
Similar variants
- C8A p.Arg424Ter Pathogenic ★★ same type
- C8A p.Arg498Ter Pathogenic/Likely pathogenic ★★ same type
- C8A p.Glu466Ter Pathogenic ★★ same type
- C8A p.Tyr210Ter Pathogenic/Likely pathogenic ★★ same type
- C8A p.Tyr384Ter Pathogenic/Likely pathogenic ★★ same type
- C8A p.Arg107Cys Uncertain significance ★★ ⚠ same type
- C8A p.Arg196His Uncertain significance ★★ ⚠ same type
- C8A p.Arg207Gln 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/c8a-c-855-plus-11a-g (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown