Is ITPR1 p.Ser826Phe (c.2477C>T) pathogenic?

ITPR1 p.Ser826Phe (c.2477C>T) is classified Uncertain significance in ITPR1 (ClinVar, Single submitter, 1 submitter; last evaluated 2017-01-01). AlphaMissense: likely benign (0.2192); Absent from gnomAD v4.1; Associated with movement disorder.

What condition is associated with ITPR1 p.Ser826Phe (c.2477C>T)?

ITPR1 p.Ser826Phe (c.2477C>T) is associated with movement disorder (ClinVar).

How common is ITPR1 p.Ser826Phe (c.2477C>T) in the general population?

ITPR1 p.Ser826Phe (c.2477C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about ITPR1 p.Ser826Phe (c.2477C>T)?

AlphaMissense predicts likely benign (score 0.2192) — an in-silico prediction, not a clinical call.

ITPR1 p.Ser826Phe

c.2477C>T · rs1553686424 · VCV523421

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2192 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/2 damaging

AlphaMissense, REVEL · SaProt no call

Conditions

movement disorder

Computational evidence

Protein change
AlphaMissense	0.2192	likely benign
REVEL	0.662	pathogenic-leaning
SaProt	—	not scored · why
⇒ REVEL calls this damaging; AlphaMissense does not; SaProt makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 2, phastCons 1
Regional constraint	o/e 0.69	unconstrained · MANE · 18 kb · p 1.3e-16 · regional, not allelic
Overall
CADD	26.8	PHRED · no single calibrated threshold — expert panels disagree

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.Ser826Phe
Coding: c.2477C>T
MANE Select: NM_001378452
dbSNP: rs1553686424
Type: single nucleotide variant
Location: chr3:4674222 (GRCh38)
Gene constraint: LOEUF 0.325 · pLI 1.00 · ClinGen HI 1/3 (gnomAD)

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

Disease context

movement disorder — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

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
ITPR1 p.Arg511Gly 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-ser826phe (accessed [today's date]).

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