CD55 p.Asn270=
c.810T>C · rs757632660 · VCV1912663
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
rare (popmax 0.248%, mid)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.137 | moderately benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | <0.2 | all four deltas below 0.2 · T>G here scores Δ0.29 · evaluated, not missing |
| Constraint at this position | ||
| Conservation | phyloP -0.61 | GERP -3.6 |
| Overall | ||
| CADD | 0.327 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.248%
Middle Eastern · 15/6,060 alleles
Filtering AF
0.152%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.123%
Overall
0.00137%
20/1,461,588 alleles · rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.248% | 404 |
| Remaining individualsnot grpmax-eligible | 0.0064% | 15,625 |
| European (non-Finnish) | 8.48e-05% | 1,179,830 |
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
- CD55
- Protein
- p.Asn270=
- Coding
- c.810T>C
- MANE Select
- NM_000574
- dbSNP
- rs757632660
- Type
- single nucleotide variant
- Location
- chr1:207331253 (GRCh38)
- Gene constraint
- LOEUF 1.234 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 78.99 · 33 PDB
- Residue 270
- a disulfide bond; the sushi 4 domain; a β-strand
Similar variants
- CD55 c.286+1G>A Likely pathogenic ★★ same type
- CD55 c.286+2T>G Likely pathogenic ★★ same type
- CD55 p.Glu50Ter Pathogenic/Likely pathogenic ★★ same type
- CD55 p.Trp213Ter Pathogenic/Likely pathogenic ★★ same type
- CD55 c.1081+1G>C Uncertain significance ★★ same type
- CD55 p.Arg221Ser Uncertain significance ★★ ⚠ same type
- CD55 p.Arg357Cys Uncertain significance ★★ ⚠ same type
- CD55 p.Arg357His 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/cd55-p-asn270 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown