AICDA p.Arg63=
c.189C>G · rs376176415 · VCV1036491
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0706%, afr)
Conditions
1
hyper-IgM syndrome type 2
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| REVEL | 0.037 | moderately benign-leaning |
|---|---|---|
| Splicing | ||
| SpliceAI | — | not assessed · no allele here is in the release |
| Constraint at this position | ||
| Conservation | phyloP 0.67 | GERP -1.5, phastCons 1 |
| Overall | ||
| CADD | 9.707 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0706%
African / African-American · 53/75,070 alleles
Filtering AF
0.0554%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.05%
Overall
0.00403%
65/1,614,252 alleles · ultra-rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 0.0706% | 1,416 |
| Admixed American | 0.00999% | 10,006 |
| Remaining individualsnot grpmax-eligible | 0.0096% | 10,418 |
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
- AICDA
- Protein
- p.Arg63=
- Coding
- c.189C>G
- MANE Select
- NM_020661
- dbSNP
- rs376176415
- Type
- single nucleotide variant
- Location
- chr12:8605453 (GRCh38)
- Gene constraint
- LOEUF 1.144 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
- Structure
- AlphaFold pLDDT 88.43 · 5 PDB
- Residue 63
- the cmp/dcmp-type deaminase domain; an α-helix
Similar variants
- AICDA p.Arg112Cys Pathogenic ★★ same condition
- AICDA p.Arg190Ter Pathogenic/Likely pathogenic ★★ same condition
- AICDA p.Arg24Trp Pathogenic ★★ same condition
- AICDA p.Arg92Ter Pathogenic/Likely pathogenic ★★ same condition
- AICDA p.Arg99Ter Pathogenic/Likely pathogenic ★★ same condition
- AICDA p.Cys147Ter Pathogenic ★★ same condition
- AICDA p.Cys87Arg Pathogenic/Likely pathogenic ★★ ⚠ same condition
- AICDA p.Cys87Ser Pathogenic/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/aicda-p-arg63 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown