ITPR1 p.Ala591=
c.1773T>G · rs191028530 · VCV1218660
Likely benign
Multiple submitters
Classification
Likely benign
ClinVar
Review
Multiple submitters ★★☆☆
ClinVar · 2 submitters
gnomAD v4.1
Rare
very rare (popmax 0.005%, amr)
Computational evidence
| Protein change | ||
| Missense predictors do not apply to this variant type; conservation carries the signal. | ||
| Splicing | ||
| SpliceAI | <0.2 | no splice effect predicted · four deltas, not one · how we know |
|---|---|---|
| Constraint at this position | ||
| Conservation | phyloP -20 | GERP -3.7 |
| Overall | ||
| CADD | 0.083 | PHRED · no single calibrated threshold — expert panels disagree |
Population frequency
gnomAD v4.1 · exomes + genomes
Grpmax group
0.005%
Admixed American · 3/59,962 alleles
Filtering AF
0.00133%
ClinGen BA1/BS1 input
FAF95, joint · FAF99 0.000668%
Overall
0.000496%
8/1,613,520 alleles · very rare
exomes 6/1,461,204 · genomes 2/152,316 · joint denominator
| Ancestry group | Frequency | 1 in |
|---|---|---|
| Admixed Americangrpmax | 0.005% | 19,987 |
| Remaining individualsnot grpmax-eligible | 0.0016% | 62,470 |
| African / African-American | 0.00133% | 75,040 |
| European (non-Finnish) | 0.000254% | 393,233 |
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
- ITPR1
- Protein
- p.Ala591=
- Coding
- c.1773T>G
- MANE Select
- NM_001378452
- dbSNP
- rs191028530
- Type
- single nucleotide variant
- Location
- chr3:4667436 (GRCh38)
- Gene constraint
- LOEUF 0.325 · pLI 1.00 · ClinGen HI 1/3 (gnomAD)
Similar variants
- ITPR1 p.Ala591Ser Uncertain significance ★ ⚠ same residue
- ITPR1 c.1252-1G>C Pathogenic/Likely pathogenic ★★ same type
- ITPR1 c.1252-1G>T Pathogenic/Likely pathogenic ★★ same type
- ITPR1 p.Arg241Lys Pathogenic/Likely pathogenic ★★ same type
- ITPR1 p.Arg269Leu Pathogenic/Likely pathogenic ★★ same type
- ITPR1 p.Arg269Trp Pathogenic/Likely pathogenic ★★ same type
- ITPR1 p.Arg504Gly Likely pathogenic ★★ same type
- ITPR1 p.Arg506Trp 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/itpr1-p-ala591 (accessed [today's date]).
Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown