C1R p.Cys338=
c.1014C>T · VCV4683723
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 0.00051%, nfe)
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 3.5 | GERP -1.5, phastCons 1 |
| Overall | ||
| CADD | 10.18 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00051%
European (non-Finnish) · 2/392,180 alleles
Filtering AF
8.5e-05%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 3.2e-05%
Overall
0.000345%
2/579,852 alleles · very rare
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
- C1R
- Protein
- p.Cys338=
- Coding
- c.1014C>T
- MANE Select
- NM_001733
- Type
- single nucleotide variant
- Location
- chr12:7088634 (GRCh38)
- Gene constraint
- LOEUF 0.635 · pLI 0.86 (gnomAD)
- Structure
- AlphaFold pLDDT 87.33 · 12 PDB
- Residue 338
- a disulfide bond; a UniProt-annotated variant site (in edspd1); the sushi 1 domain; a β-strand
Similar variants
- C1R p.Cys338Arg Pathogenic ★★ same residue
- C1R p.Cys338Tyr Likely pathogenic ★ same residue
- C1R p.Arg301Pro Pathogenic ★★ ⚠ same type
- C1R p.Asp290Gly Pathogenic/Likely pathogenic ★★ same type
- C1R p.Cys371Trp Pathogenic ★★ same type
- C1R p.Gly297Asp Pathogenic/Likely pathogenic ★★ same type
- C1R p.His642Gln Uncertain significance ★★ ⚠ same type
- C1R p.Leu285Met 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/c1r-p-cys338 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown