Is NOTCH3 p.Asp45= (c.135C>T) pathogenic?

NOTCH3 p.Asp45= (c.135C>T) is classified Benign/Likely benign in NOTCH3 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2025-12-13). Ultra-rare (popmax 0.0751%, amr); Associated with cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 1.

How common is NOTCH3 p.Asp45= (c.135C>T) in the general population?

NOTCH3 p.Asp45= (c.135C>T) is ultra-rare (popmax 0.0751%, amr) (gnomAD).

NOTCH3 p.Asp45=

Q: What condition is associated with NOTCH3 p.Asp45= (c.135C>T)?

NOTCH3 p.Asp45= (c.135C>T) is associated with cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 1, lateral meningocele syndrome, myofibromatosis, infantile, 2 (ClinVar).

Q: How is Cerebral autosomal dominant arteriopathy-subcortical infarcts-leukoencephalopathy inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

c.135C>T · rs370177269 · VCV767149

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.0751%, amr)

Conditions

cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 1

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · G>C here scores Δ0.25 · evaluated, not missing
Constraint at this position
Conservation	phyloP -7.9	GERP -2.4
Overall
CADD	0.079	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0751% Admixed American · 45/59,902 alleles

Filtering AF 0.0577% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0514%

Overall 0.00534% 86/1,611,206 alleles · ultra-rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.0751%	1,331
Remaining individualsnot grpmax-eligible	0.0128%	7,795
European (non-Finnish)	0.00254%	39,321
South Asian	0.0022%	45,449
African / African-American	0.00134%	74,790

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: NOTCH3
Protein: p.Asp45=
Coding: c.135C>T
MANE Select: NM_000435
dbSNP: rs370177269
Type: single nucleotide variant
Location: chr19:15197562 (GRCh38)
Gene constraint: LOEUF 0.566 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 61.79 · 6 PDB
Residue 45: a disulfide bond; the egf-like 1 domain

Full NOTCH3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 1 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: lateral meningocele syndrome myofibromatosis, infantile, 2

For Cerebral autosomal dominant arteriopathy-subcortical infarcts-leukoencephalopathy (Orphanet):

Inheritance: Autosomal dominant
Onset: Adult
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

NOTCH3 p.Asp45His Uncertain significance ★★ ⚠ same residue
NOTCH3 c.341-2A>T Pathogenic ★★ same condition
NOTCH3 p.Arg1006Cys Pathogenic ★★ ⚠ same condition
NOTCH3 p.Arg1076Cys Pathogenic/Likely pathogenic ★★ ⚠ same condition
NOTCH3 p.Arg110Cys Pathogenic ★★ same condition
NOTCH3 p.Arg133Cys Pathogenic/Likely pathogenic ★★ same condition
NOTCH3 p.Arg141Cys Pathogenic ★★ same condition
NOTCH3 p.Arg153Cys Pathogenic ★★ 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/notch3-p-asp45 (accessed [today's date]).

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