C3 c.74+1del
Uncertain significance
Single submitter
Classification
Uncertain significance
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
Consequence
canonical splice-site (±1/±2)
predicted LoF
gnomAD v4.1
Rare
Conditions
1
atypical hemolytic-uremic syndrome
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Consequence | canonical splice-site (±1/±2) | predicted loss-of-function |
|---|---|---|
| Splicing | ||
| Splice region | donor +1 | canonical splice dinucleotide (donor +1) · inside the BP7-excluded zone |
| SpliceAI | — | not assessed · substitutions only |
| Constraint at this position | ||
| Conservation | phyloP 10 | GERP 1.7, phastCons 1 |
| Non-coding constraint | Z -0.49 | 1 kb window · o/e 1.03 · regional · uncalibrated |
Predicted loss-of-function is descriptive, not an applied PVS1 code.
Variant & gene context
- Gene
- C3
- Coding
- c.74+1del
- MANE Select
- NM_000064
- Type
- Deletion
- Location
- chr19:6720515 (GRCh38)
- Gene constraint
- LOEUF 0.541 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 79.84 · 80 PDB
Disease context
atypical hemolytic-uremic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatmentsFor Atypical hemolytic uremic syndrome (Orphanet):
- Inheritance
- Autosomal dominant, Autosomal recessive, Not applicable
- Onset
- All ages
- Prevalence
- 1-9 / 1 000 000 (United States)
Similar variants
- C3 p.Ile1108_Lys1111del Uncertain significance ★★ same condition
- C3 c.-5del Uncertain significance ★ same condition
- C3 p.Leu180del Uncertain significance ★ same condition
- C3 p.Arg161Trp Pathogenic/Likely pathogenic ★★ ⚠ same condition
- C3 p.Arg592Gln Pathogenic/Likely pathogenic ★★ ⚠ same condition
- C3 p.Arg592Trp Likely pathogenic ★★ ⚠ same condition
- C3 p.Ile1157Thr Pathogenic/Likely pathogenic ★★ ⚠ same condition
- C3 p.Trp1034Arg Likely pathogenic ★★ same condition
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/c3-c-74-plus-1del (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown