rs1188569102
Variant summary
Our verdict is Pathogenic. The variant received 13 ACMG points: 13P and 0B. PM1PM2PP3PP5_Very_Strong
The NM_000435.3(NOTCH3):c.2953C>T(p.Arg985Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R985P) has been classified as Uncertain significance.
Frequency
Consequence
NM_000435.3 missense
Scores
Clinical Significance
Conservation
Publications
- cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 1Inheritance: AR, AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, Laboratory for Molecular Medicine, Orphanet, Labcorp Genetics (formerly Invitae)
- lateral meningocele syndromeInheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
- infantile myofibromatosisInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- myofibromatosis, infantile, 2Inheritance: AD Classification: LIMITED Submitted by: G2P
- pulmonary arterial hypertensionInheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
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ACMG classification
Our verdict: Pathogenic. The variant received 13 ACMG points.
Transcripts
RefSeq
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt | 
|---|---|---|---|---|---|---|---|---|---|---|
| NOTCH3 | ENST00000263388.7 | c.2953C>T | p.Arg985Cys | missense_variant | Exon 18 of 33 | 1 | NM_000435.3 | ENSP00000263388.1 | ||
| NOTCH3 | ENST00000601011.1 | c.2794C>T | p.Arg932Cys | missense_variant | Exon 17 of 23 | 5 | ENSP00000473138.1 | 
Frequencies
GnomAD3 genomes  
GnomAD4 exome Data not reliable, filtered out with message: AC0 AF:  0.00  AC: 0AN: 1445532Hom.:  0  Cov.: 34 AF XY:  0.00  AC XY: 0AN XY: 717856 
GnomAD4 genome  
ClinVar
Submissions by phenotype
not provided    Pathogenic:3 
This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 985 of the NOTCH3 protein (p.Arg985Cys). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with cerebral arteriopathy with subcortical infarcts and leukoencephalopathy 1 (CADASIL) (PMID: 9388399, 11755616, 16009764, 19174371, 30311053, 32277177). This variant is also known as c.3031C>T. ClinVar contains an entry for this variant (Variation ID: 447819). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on NOTCH3 protein function. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -
This variant has not been reported in large, multi-ethnic general populations (http://gnomad.broadinstitute.org). This variant has been identified in at least one individual with clinical features associated with this gene. At Athena Diagnostics, this variant has been found in a single case where an alternate explanation for disease was also identified. This variant alters a critical location within the protein, and is expected to severely affect function and cause disease. Greater than 90% of NOTCH3 pathogenic mutations associated with CADASIL involve the gain or loss of a cysteine residue within the epidermal growth factor (EGF)-like repeat domain (PMID: 32457593, 20301673). -
PP2, PP4, PM1, PM2_moderate, PS4 -
Cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 1    Pathogenic:2 
Variant summary: NOTCH3 c.2953C>T (p.Arg985Cys) results in a non-conservative amino acid change in the encoded protein sequence. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change. The variant was absent in 215298 control chromosomes. c.2953C>T has been observed in multiple individuals affected with Cerebral arteriopathy, autosomal dominant, with subcortical infarcts and leukoencephalopathy, type 1 (Joutel_1997, Peters_2005, Tikka_2009, Mukai_2020). These data indicate that the variant is very likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 9388399, 32277177, 16009764, 19174371). ClinVar contains an entry for this variant (Variation ID: 447819). Based on the evidence outlined above, the variant was classified as pathogenic. -
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Computational scores
Source: 
Splicing
 Find out detailed SpliceAI scores and Pangolin per-transcript scores at