CNTN2 p.Pro995=
c.2985T>C · rs138239566 · VCV772411
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
ultra-rare (popmax 0.0493%, mid)
Conditions
1
epilepsy, familial adult myoclonic, 5
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 -4 |
| Overall | ||
| CADD | 0.09 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.0493%
Middle Eastern · 3/6,082 alleles
Filtering AF
0.0141%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.0112%
Overall
0.00477%
77/1,613,930 alleles · ultra-rare
exomes 75/1,461,812 · genomes 2/152,118 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Middle Easterngrpmax | 0.0493% | 2,027 |
| Admixed American | 0.0233% | 4,286 |
| South Asian | 0.00878% | 11,385 |
| Remaining individualsnot grpmax-eligible | 0.0048% | 20,827 |
| European (non-Finnish) | 0.00415% | 24,082 |
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
- CNTN2
- Protein
- p.Pro995=
- Coding
- c.2985T>C
- MANE Select
- NM_005076
- dbSNP
- rs138239566
- Type
- single nucleotide variant
- Location
- chr1:205073208 (GRCh38)
- Gene constraint
- LOEUF 0.542 · pLI 0.02 (gnomAD)
- Structure
- AlphaFold pLDDT 86.13 · 5 PDB
- Residue 995
- the fibronectin type-iii 4 domain
Similar variants
- CNTN2 p.Pro995Ser Uncertain significance ★ ⚠ same residue
- CNTN2 c.1241-1G>C Likely pathogenic ★★ same condition
- CNTN2 c.2432-2A>G Likely pathogenic ★★ same condition
- CNTN2 p.Arg140Ter Pathogenic/Likely pathogenic ★★ same condition
- CNTN2 p.Arg314Ter Pathogenic ★★ same condition
- CNTN2 p.Trp731Ter Pathogenic/Likely pathogenic ★★ same condition
- CNTN2 c.2196+5G>A Uncertain significance ★★ same condition
- CNTN2 p.Ala230Val Uncertain significance ★★ ⚠ 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/cntn2-p-pro995 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown