IMPG2 p.Asp206=
c.618C>T · rs746975626 · VCV1105459
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 3 submitters
gnomAD v4.1
Rare
very rare (popmax 0.00659%, sas)
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 0.076 | phastCons 0.023 |
| Overall | ||
| CADD | 6.92 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.00659%
South Asian · 6/91,066 alleles
Filtering AF
0.00286%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.00195%
Overall
0.00186%
30/1,613,764 alleles · very rare
exomes 25/1,461,554 · genomes 5/152,210 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| South Asiangrpmax | 0.00659% | 15,178 |
| African / African-American | 0.00533% | 18,753 |
| East Asian | 0.00446% | 22,437 |
| Admixed American | 0.00333% | 29,997 |
| Remaining individualsnot grpmax-eligible | 0.0032% | 31,251 |
| European (non-Finnish) | 0.00119% | 84,270 |
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
- IMPG2
- Protein
- p.Asp206=
- Coding
- c.618C>T
- MANE Select
- NM_016247
- dbSNP
- rs746975626
- Type
- single nucleotide variant
- Location
- chr3:101275711 (GRCh38)
- Gene constraint
- LOEUF 0.773 · pLI <0.01 (gnomAD)
- Structure
- AlphaFold pLDDT 54.28
- Residue 206
- a UniProt-annotated variant site (in rp56); the 'disordered' region
Similar variants
- IMPG2 c.1240-1G>A Likely pathogenic ★★ same type
- IMPG2 c.1240-2A>G Pathogenic/Likely pathogenic ★★ same type
- IMPG2 c.502-2A>G Likely pathogenic ★★ same type
- IMPG2 c.583+1G>C Pathogenic/Likely pathogenic ★★ same type
- IMPG2 c.667-1G>A Pathogenic/Likely pathogenic ★★ same type
- IMPG2 c.828+1G>A Pathogenic/Likely pathogenic ★★ same type
- IMPG2 c.829-1G>T Pathogenic/Likely pathogenic ★★ same type
- IMPG2 c.829-2A>T Pathogenic/Likely 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/impg2-p-asp206 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown