C5 p.Ala1441=
c.4323C>T · rs773359384 · VCV1373877
Uncertain significance
Multiple submitters
Classification
Uncertain significance
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0166%, mid)
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 1.4 | GERP -4.2, phastCons 0.74 |
| Overall | ||
| CADD | 8.81 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0166%
Middle Eastern · 1/6,038 alleles
Filtering AF
0.0101%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00824%
Overall
0.00356%
57/1,600,360 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.0166% | 6,038 |
| South Asian | 0.0165% | 6,052 |
| Admixed American | 0.00334% | 29,981 |
| Remaining individualsnot grpmax-eligible | 0.00322% | 31,034 |
| European (non-Finnish) | 0.00317% | 31,557 |
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
- C5
- Protein
- p.Ala1441=
- Coding
- c.4323C>T
- MANE Select
- NM_001735
- dbSNP
- rs773359384
- Type
- single nucleotide variant
- Location
- chr9:120963636 (GRCh38)
- Gene constraint
- LOEUF 0.779 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 81.67 · 49 PDB
- Residue 1441
- a disulfide bond; an α-helix; a UniProt-annotated variant site (in c5d)
Similar variants
- C5 p.Ala1441Ser Uncertain significance ★★ ⚠ same residue
- C5 c.2257+1G>A Likely pathogenic ★★ same type
- C5 c.4679-2A>G Likely pathogenic ★★ same type
- C5 p.Arg1476Ter Pathogenic/Likely pathogenic ★★ same type
- C5 p.Gln19Ter Pathogenic ★★ same type
- C5 p.Glu1437Ter Pathogenic/Likely pathogenic ★★ same type
- C5 p.Trp469Ter Pathogenic/Likely pathogenic ★★ same type
- C5 c.2059+3A>G 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/c5-p-ala1441 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown