CLCN2 p.Ile302=
c.906T>C · rs2228291 · VCV1164751
Benign/Likely benign
Multiple submitters
Classification
Benign/Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 4 submitters
gnomAD v4.1
Common
common (popmax 45%, afr) — too common for a highly-penetrant pathogenic allele
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 -0.57 | GERP -3.4, phastCons 0.003 |
| Overall | ||
| CADD | 0.36 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
45%
African / African-American · 33,693/74,886 alleles
Filtering AF
44.6%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 44.4%
Overall
25.1%
404,249/1,613,504 alleles · common
| Ancestry group | Frequency | 1 in |
|---|---|---|
| African / African-Americangrpmax | 45% | 2 |
| Admixed American | 43.7% | 2 |
| East Asian | 39.7% | 3 |
| Middle Eastern | 37.4% | 3 |
| Ashkenazi Jewishnot grpmax-eligible | 34.4% | 3 |
| Amishnot grpmax-eligible | 31.5% | 3 |
| Remaining individualsnot grpmax-eligible | 27.9% | 4 |
| European (non-Finnish) | 22.3% | 4 |
| South Asian | 22.1% | 5 |
| Finnishnot grpmax-eligible | 21.2% | 5 |
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
- CLCN2
- Protein
- p.Ile302=
- Coding
- c.906T>C
- MANE Select
- NM_004366
- dbSNP
- rs2228291
- Type
- single nucleotide variant
- Location
- chr3:184357259 (GRCh38)
- Gene constraint
- LOEUF 0.786 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 72.82 · 8 PDB
- Residue 302
- a β-strand
Similar variants
- CLCN2 c.898+1G>A Likely pathogenic ★★ same type
- CLCN2 p.Arg172Gln Pathogenic ★★ same type
- CLCN2 p.Arg610Ter Pathogenic/Likely pathogenic ★★ same type
- CLCN2 p.Glu619Ter Pathogenic/Likely pathogenic ★★ same type
- CLCN2 p.Gly24Asp Pathogenic/Likely pathogenic ★★ ⚠ same type
- CLCN2 p.Trp570Ter Pathogenic/Likely pathogenic ★★ same type
- CLCN2 c.1171-3T>C Uncertain significance ★★ same type
- CLCN2 c.1721+4C>T 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/clcn2-p-ile302 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown