1-119925638-C-G

Variant names:

• chr1-119925638-C-G
• rs587735797
• NM_024408.4:c.4178G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_024408.4(NOTCH2):​c.4178G>C​(p.Arg1393Pro) 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. R1393H) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: NOTCH2 NM_024408.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.50
• Publications: 0 publications found

Genes affected

NOTCH2 (HGNC:7882): (notch receptor 2) This gene encodes a member of the Notch family. Members of this Type 1 transmembrane protein family share structural characteristics including an extracellular domain consisting of multiple epidermal growth factor-like (EGF) repeats, and an intracellular domain consisting of multiple, different domain types. Notch family members play a role in a variety of developmental processes by controlling cell fate decisions. The Notch signaling network is an evolutionarily conserved intercellular signaling pathway which regulates interactions between physically adjacent cells. In Drosophilia, notch interaction with its cell-bound ligands (delta, serrate) establishes an intercellular signaling pathway that plays a key role in development. Homologues of the notch-ligands have also been identified in human, but precise interactions between these ligands and the human notch homologues remain to be determined. This protein is cleaved in the trans-Golgi network, and presented on the cell surface as a heterodimer. This protein functions as a receptor for membrane bound ligands, and may play a role in vascular, renal and hepatic development. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2011]

NOTCH2 Gene-Disease associations (from GenCC):

• acroosteolysis dominant type

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• Alagille syndrome due to a NOTCH2 point mutation

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Alagille syndrome

  Inheritance: AD Classification: MODERATE Submitted by: Illumina

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.18319789).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NOTCH2	NM_024408.4	c.4178G>C	p.Arg1393Pro	missense_variant	Exon 25 of 34	ENST00000256646.7	NP_077719.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NOTCH2	ENST00000256646.7	c.4178G>C	p.Arg1393Pro	missense_variant	Exon 25 of 34	1	NM_024408.4	ENSP00000256646.2

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	0.079
BayesDel_addAF	Benign	-0.012	T
BayesDel_noAF	Benign	-0.26
CADD	Benign	18
DANN	Benign	0.97
DEOGEN2	Benign	0.20	T
Eigen	Benign	-0.29
Eigen_PC	Benign	-0.091
FATHMM_MKL	Benign	0.61	D
LIST_S2	Benign	0.41	T
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.18	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	-0.73	N
PhyloP100		1.5
PrimateAI	Benign	0.35	T
PROVEAN	Benign	0.14	N
REVEL	Benign	0.20
Sift	Benign	0.32	T
Sift4G	Benign	0.29	T
Polyphen		0.56	P
Vest4		0.44
MutPred		0.38		Gain of glycosylation at R1393 (P = 0.0322);
MVP		0.83
MPC		0.82
ClinPred		0.55	D
GERP RS		3.9
Varity_R		0.12
gMVP		0.61
Mutation Taster		=62/38	polymorphism

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: rs587735797; hg19: chr1-120468261;