Is NOTCH2 p.Val274= (c.822T>G) pathogenic?

NOTCH2 p.Val274= (c.822T>G) is classified Conflicting classifications of pathogenicity in NOTCH2 (ClinVar, Conflicting submitters, 5 submitters; last evaluated 2026-01-26). Ultra-rare (popmax 0.0379%, eas); Associated with Alagille syndrome due to a NOTCH2 point mutation.

What condition is associated with NOTCH2 p.Val274= (c.822T>G)?

NOTCH2 p.Val274= (c.822T>G) is associated with Alagille syndrome due to a NOTCH2 point mutation, acroosteolysis dominant type (ClinVar).

How common is NOTCH2 p.Val274= (c.822T>G) in the general population?

NOTCH2 p.Val274= (c.822T>G) is ultra-rare (popmax 0.0379%, eas) (gnomAD).

NOTCH2 p.Val274=

c.822T>G · rs782642000 · VCV594049

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0379%, eas)

Conditions

Alagille syndrome due to a NOTCH2 point mutation

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 -0.2	phastCons 0.002
Overall
CADD	7.225	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0379% East Asian · 17/44,884 alleles

Filtering AF 0.0241% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0197%

Overall 0.00118% 19/1,613,672 alleles · ultra-rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.0379%	2,640
Remaining individualsnot grpmax-eligible	0.0032%	31,233

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: NOTCH2
Protein: p.Val274=
Coding: c.822T>G
MANE Select: NM_024408
dbSNP: rs782642000
Type: single nucleotide variant
Location: chr1:119987012 (GRCh38)
Gene constraint: LOEUF 0.151 · pLI 1.00 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 59.51 · 2 PDB
Residue 274: a disulfide bond; the egf-like 7; calcium-binding domain

Full NOTCH2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Alagille syndrome due to a NOTCH2 point mutation — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: acroosteolysis dominant type

Similar variants

NOTCH2 p.Val274Ile Uncertain significance ★★ ⚠ same residue
NOTCH2 p.Arg2003Ter Pathogenic/Likely pathogenic ★★ same condition
NOTCH2 p.Arg2400Ter Pathogenic ★★ same condition
NOTCH2 p.Gln2223Ter Pathogenic ★★ same condition
NOTCH2 p.Gln2263Ter Pathogenic ★★ same condition
NOTCH2 p.Gln2285Ter Pathogenic/Likely pathogenic ★★ same condition
NOTCH2 c.2753-8T>A Uncertain significance ★★ same condition
NOTCH2 c.5214-10A>G Uncertain significance ★★ same condition

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/notch2-p-val274 (accessed [today's date]).

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