C1R p.Pro100=
c.300G>A · VCV4687592
Benign
Single submitter
Classification
Benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
rare (popmax 0.103%, amr)
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 -11 | GERP -3.4 |
| Overall | ||
| CADD | 0.829 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.103%
Admixed American · 57/55,312 alleles
Filtering AF
0.0816%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0739%
Overall
0.0121%
92/757,614 alleles · rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.103% | 970 |
| Remaining individualsnot grpmax-eligible | 0.0146% | 6,870 |
| European (non-Finnish) | 0.00566% | 17,653 |
| South Asian | 0.00422% | 23,723 |
| African / African-American | 0.00341% | 29,353 |
| East Asian | 0.00248% | 40,356 |
| Finnishnot grpmax-eligible | 0.0016% | 62,342 |
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.Pro100=
- Coding
- c.300G>A
- MANE Select
- NM_001733
- Type
- single nucleotide variant
- Location
- chr12:7090180 (GRCh38)
- Gene constraint
- LOEUF 0.635 · pLI 0.86 (gnomAD)
- Structure
- AlphaFold pLDDT 87.33 · 12 PDB
- Residue 100
- the cub 1 domain
Similar variants
- C1R p.Pro100Leu Uncertain significance ★ ⚠ same residue
- C1R p.Arg301Pro Pathogenic ★★ ⚠ same type
- C1R p.Asp290Gly Pathogenic/Likely pathogenic ★★ same type
- C1R p.Cys338Arg 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-pro100 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown