Benign
Multiple submitters
Classification
Benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 3 submitters
gnomAD v4.1
Common
common (popmax 5.03%, afr) — too common for a highly-penetrant pathogenic allele
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 0.95 | GERP 0.94, phastCons 1 |
| Overall | ||
| CADD | 8.103 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
5.03%
African / African-American · 3,773/74,994 alleles
Filtering AF
4.9%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 4.84%
Overall
0.262%
4,231/1,614,040 alleles · common
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 5.03% | 20 |
| Remaining individualsnot grpmax-eligible | 0.301% | 332 |
| Admixed American | 0.268% | 373 |
| Middle Eastern | 0.231% | 433 |
| South Asian | 0.00769% | 13,011 |
| European (non-Finnish) | 0.00737% | 13,563 |
| East Asian | 0.00223% | 44,854 |
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
- C8B
- Protein
- p.Gly429=
- Coding
- c.1287A>C
- MANE Select
- NM_000066
- dbSNP
- rs856841
- Type
- single nucleotide variant
- Location
- chr1:56940960 (GRCh38)
- Gene constraint
- LOEUF 1.18 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 81.99 · 8 PDB
- Residue 429
- a UniProt-annotated variant site (in c8d2); the macpf domain
Similar variants
- C8B p.Arg284Ter Pathogenic ★★ same type
- C8B p.Arg428Ter Pathogenic ★★ same type
- C8B p.Cys508Ter Pathogenic/Likely pathogenic ★★ same type
- C8B p.Gln91Ter Pathogenic/Likely pathogenic ★★ same type
- C8B p.Trp9Ter Pathogenic ★★ same type
- C8B p.Ala21Thr Uncertain significance ★★ ⚠ same type
- C8B p.Ala446Val Uncertain significance ★★ ⚠ same type
- C8B p.Ala461Ser 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/c8b-p-gly429 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown