COL4A2 p.Pro248=
c.744G>A · rs776546128 · VCV761569
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00508%, 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 -8.6 | GERP -2.8 |
| Overall | ||
| CADD | 0.058 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00508%
European (non-Finnish) · 60/1,179,982 alleles
Filtering AF
0.00402%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00362%
Overall
0.00434%
70/1,613,646 alleles · very rare
| Ancestry group | Frequency | 1 in |
|---|---|---|
| European (non-Finnish)grpmax | 0.00508% | 19,666 |
| Remaining individualsnot grpmax-eligible | 0.0048% | 20,823 |
| African / African-American | 0.00401% | 24,917 |
| East Asian | 0.00223% | 44,886 |
| South Asian | 0.0022% | 45,527 |
| Admixed American | 0.00167% | 59,952 |
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
- COL4A2
- Protein
- p.Pro248=
- Coding
- c.744G>A
- MANE Select
- NM_001846
- dbSNP
- rs776546128
- Type
- single nucleotide variant
- Location
- chr13:110436286 (GRCh38)
- Gene constraint
- LOEUF 0.618 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 47.97 · 4 PDB
- Residue 248
- the 'triple-helical region' region
Similar variants
- COL4A2 p.Pro248Leu Uncertain significance ★ ⚠ same residue
- COL4A2 c.361-1G>A Pathogenic/Likely pathogenic ★★ same type
- COL4A2 p.Gly1389Arg Pathogenic/Likely pathogenic ★★ same type
- COL4A2 p.Gly619Asp Likely pathogenic ★★ same type
- COL4A2 c.2425+3G>A Uncertain significance ★★ same type
- COL4A2 c.315+5G>A Uncertain significance ★★ same type
- COL4A2 c.726+4A>G Uncertain significance ★★ same type
- COL4A2 p.Ala1183Val 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/col4a2-p-pro248 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown