chr19-15187214-TGT-GGG

Variant names:

• chr19-15187214-TGT-GGG
• NM_000435.3:c.1729_1731delACAinsCCC
• NOTCH3 p.Thr577Pro

GermlineCancer (beta)

Variant summary

Our verdict is Uncertain significance.

+4 Uncertain · Hot

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 4 classification points (ACGS-UK Somatic Oncogenicity v2025). O3_ModerateO7_Moderate

The NM_000435.3(NOTCH3):c.1729_1731delACAinsCCC (p.Thr577Pro) variant causes a missense change. The gene NOTCH3 is a tumor suppressor gene (CancerMine: 5 TSG, 18 oncogene, 13 driver citations). The gene NOTCH3 is a known oncogene (CancerMine: 5 TSG, 18 oncogene, 13 driver citations). The gene NOTCH3 is a cancer driver gene (CancerMine: 5 TSG, 18 oncogene, 13 driver citations). Note: allele frequency estimates from gnomAD may be inaccurate for this variant type (MNP or indel longer than 3 bp) due to technology limitations. The variant is absent from the gnomAD population database at sites with sufficient sequencing coverage. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Other variants at the same amino acid position have been reported in ClinVar (not pathogenic): p.T577A: Conflicting_classifications_of_pathogenicity (ClinVar VariationId 447797)

• Frequency: Genomes: not found (cov: 33)
• Consequence: NOTCH3 NM_000435.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.398
• Publications: 0 publications found

Genes affected

NOTCH3 (HGNC:7883): (notch receptor 3) This gene encodes the third discovered human homologue of the Drosophilia melanogaster type I membrane protein notch. In Drosophilia, notch interaction with its cell-bound ligands (delta, serrate) establishes an intercellular signalling pathway that plays a key role in neural development. Homologues of the notch-ligands have also been identified in human, but precise interactions between these ligands and the human notch homologues remains to be determined. Mutations in NOTCH3 have been identified as the underlying cause of cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL). [provided by RefSeq, Jul 2008]

NOTCH3 Gene-Disease associations (from GenCC):

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

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, ClinGen, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Orphanet, Ambry Genetics
• lateral meningocele syndrome

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• infantile myofibromatosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• myofibromatosis, infantile, 2

  Inheritance: AD Classification: LIMITED Submitted by: G2P
• inherited thrombocytopenia

  Inheritance: AR Classification: LIMITED Submitted by: ClinGen
• pulmonary arterial hypertension

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

Classification according to ACGS-UK Somatic Oncogenicity v2025

Classification was made for transcript:

Our verdict: Uncertain_significance. The variant received 4 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	O3Absent or very rare in population		Absent or extremely rare in gnomAD (AC ≤ 2) — O3 moderate; GnomAD: AF = absent, AC = 0 — absent/extremely rare (O3 moderate [+2])
	O7Mutational hotspot or critical domain		Moderate: ≥10 same AA change, or strong functional domain signal; No cancerhotspots.org hit at this position; UniProt domain: 11 pathogenic, 5 benign (OR vs. background: 10.5).; ±8 AA neighbourhood: 3 pathogenic, 0 benign (OR vs. background: 35.0); Variant does not impact splicing — splice-hotspot path not applicable

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_000435.3. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	NOTCH3 NM_000435.3	MANE Select	c.1729_1731delACAinsCCC p.Thr577Pro	missense	N/A	Prot: NP_000426.2 UniProt:

NOTCH3 NM_000435.3

MANE Select

HGVSc / HGVSpc.1729_1731delACAinsCCCp.Thr577Pro

Exon rankN/A

missense

Prot: NP_000426.2UniProt: Q9UM47

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	NOTCH3 ENST00000263388.7	TSL:1MANE Select	c.1729_1731delACAinsCCC p.Thr577Pro	missense	N/A	Prot: ENSP00000263388.1 UniProt:
	NOTCH3 ENST00000931534.1		c.1729_1731delACAinsCCC p.Thr577Pro	missense	N/A	Prot: ENSP00000601593.1 UniProt:
	NOTCH3 ENST00000931532.1		c.1708_1710delACAinsCCC p.Thr570Pro	missense	N/A	Prot: ENSP00000601591.1 UniProt:

NOTCH3 ENST00000263388.7

TSL:1MANE Select

HGVSc / HGVSpc.1729_1731delACAinsCCCp.Thr577Pro

Exon rankN/A

missense

Prot: ENSP00000263388.1UniProt: Q9UM47

NOTCH3 ENST00000931534.1

HGVSc / HGVSpc.1729_1731delACAinsCCCp.Thr577Pro

Exon rankN/A

missense

Prot: ENSP00000601593.1UniProt: A0ACI8TLY8

NOTCH3 ENST00000931532.1

HGVSc / HGVSpc.1708_1710delACAinsCCCp.Thr570Pro

Exon rankN/A

missense

Prot: ENSP00000601591.1UniProt: A0ACI8TLB6

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 2 sources Large-scale international reference populations
GnomAD3 genomes	AF:	AC:	Hom:	AN:	Cov:33
GnomAD4 genome	AF:	AC:	Hom:	AN:	Cov:33

Showing 2 sources

ClinVar

Not reported in ClinVar

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
PhyloP100	Benign	0.40

Showing 1 of 1 scores

Splicing Scores

No splicing scores have been computed for this variant.

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

hg19: chr19-15298025;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar