ACAN p.Arg668=
c.2004G>T · VCV4719579
Likely benign
Single submitter
Classification
Likely benign
ClinVar
Review
Single submitter ★☆☆☆
ClinVar · 1 submitter
gnomAD v4.1
Rare
very rare (popmax 8.48e-05%, 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 2.3 | GERP -3, phastCons 1 |
| Overall | ||
| CADD | 7.224 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
8.48e-05%
European (non-Finnish) · 1/1,179,864 alleles
Overall
6.84e-05%
1/1,461,456 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
- ACAN
- Protein
- p.Arg668=
- Coding
- c.2004G>T
- MANE Select
- NM_001369268
- Type
- single nucleotide variant
- Location
- chr15:88849709 (GRCh38)
- Gene constraint
- LOEUF 0.377 · pLI 1.00 (gnomAD)
- Structure
- AlphaFold pLDDT 53.32 · 4 PDB
- Residue 668
- a disulfide bond; the 'g2-b'' region; the link 4 domain
Similar variants
- ACAN p.Arg668Trp Uncertain significance ★★ ⚠ same residue
- ACAN p.Arg668Gln Benign/Likely benign ★★ ⚠ same residue
- ACAN p.Arg668Leu Uncertain significance ★ ⚠ same residue
- ACAN p.Arg668fs Pathogenic ★ same residue
- ACAN c.1733-2A>G Likely pathogenic ★★ same type
- ACAN c.630-13G>A Pathogenic ★★ same type
- ACAN c.7302+1G>A Pathogenic/Likely pathogenic ★★ same type
- ACAN p.Arg236Ter Pathogenic ★★ 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/acan-p-arg668 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown