19-15185632-C-G

Variant names:

• chr19-15185632-C-G
• rs376046941
• NM_000435.3:c.1999G>C

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM2 PM5 BP4

The NM_000435.3(NOTCH3):​c.1999G>C​(p.Gly667Arg) 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 benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G667C) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: NOTCH3 NM_000435.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.73
• Publications: 1 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: 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 syndrome

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

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

  Inheritance: AD Classification: LIMITED Submitted by: G2P
• pulmonary arterial hypertension

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-15185632-C-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 447805.
• BP4: Computational evidence support a benign effect (MetaRNN=0.36339858).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NOTCH3	NM_000435.3	c.1999G>C	p.Gly667Arg	missense_variant	Exon 13 of 33	ENST00000263388.7	NP_000426.2
NOTCH3	XM_005259924.5	c.1999G>C	p.Gly667Arg	missense_variant	Exon 13 of 32		XP_005259981.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NOTCH3	ENST00000263388.7	c.1999G>C	p.Gly667Arg	missense_variant	Exon 13 of 33	1	NM_000435.3	ENSP00000263388.1
NOTCH3	ENST00000601011.1	c.1996G>C	p.Gly666Arg	missense_variant	Exon 13 of 23	5		ENSP00000473138.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.086
BayesDel_addAF	Benign	-0.032	T
BayesDel_noAF	Benign	-0.28
CADD	Benign	15
DANN	Benign	0.93
DEOGEN2	Benign	0.091	T;T
Eigen	Benign	-0.51
Eigen_PC	Benign	-0.28
FATHMM_MKL	Benign	0.52	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Benign	0.033	D
MetaRNN	Benign	0.36	T;T
MetaSVM	Benign	-0.53	T
MutationAssessor	Benign	-0.58	N;.
PhyloP100		2.7
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-0.31	N;.
REVEL	Benign	0.27
Sift	Benign	0.89	T;.
Sift4G	Benign	0.68	T;T
Polyphen		0.0	B;.
Vest4		0.31
MutPred		0.70		Loss of glycosylation at S664 (P = 0.1028);.;
MVP		0.97
MPC		0.51
ClinPred		0.52	D
GERP RS		4.0
Varity_R		0.054
gMVP		0.54
Mutation Taster		=50/50

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs376046941; hg19: chr19-15296443;