Is ITPR1 p.Val433Phe (c.1297G>T) pathogenic?

ITPR1 p.Val433Phe (c.1297G>T) is classified Uncertain significance in ITPR1 (ClinVar, Single submitter, 1 submitter; last evaluated 2019-10-28). AlphaMissense: likely pathogenic (0.8421); Absent from gnomAD v4.1.

How common is ITPR1 p.Val433Phe (c.1297G>T) in the general population?

ITPR1 p.Val433Phe (c.1297G>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ITPR1 p.Val433Phe (c.1297G>T)?

AlphaMissense predicts likely pathogenic (score 0.8421) — an in-silico prediction, not a clinical call.

ITPR1 p.Val433Phe

c.1297G>T · rs2093848251 · VCV1308733

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.8421 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

2/2 damaging

AlphaMissense, REVEL · SaProt no call

Computational evidence

Protein change
AlphaMissense	0.8421	likely pathogenic
REVEL	0.728	pathogenic-leaning
SaProt	—	not scored · why
⇒ AlphaMissense and REVEL both call this damaging; SaProt makes no call.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 12	GERP 2, phastCons 1
Regional constraint	o/e 0.15	constrained · MANE · 47 bp · p 0.00012 · regional, not allelic
Overall
CADD	28.9	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL is an independent agreement signal.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: ITPR1
Protein: p.Val433Phe
Coding: c.1297G>T
MANE Select: NM_001378452
dbSNP: rs2093848251
Type: single nucleotide variant
Location: chr3:4662127 (GRCh38)
Gene constraint: LOEUF 0.325 · pLI 1.00 · ClinGen HI 1/3 (gnomAD)
Residue 433: the mir 5 domain

Full ITPR1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ITPR1 p.Val433Ile 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-val433phe (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown