1-119966426-T-G

Variant names:

• chr1-119966426-T-G
• rs73004269
• NM_024408.4:c.1517A>C

Variant summary

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

The NM_024408.4(NOTCH2):​c.1517A>C​(p.Asn506Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. N506S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: NOTCH2 NM_024408.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.95
• Publications: 1 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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NOTCH2	NM_024408.4	c.1517A>C	p.Asn506Thr	missense_variant	Exon 9 of 34	ENST00000256646.7	NP_077719.2
NOTCH2	NM_001200001.2	c.1517A>C	p.Asn506Thr	missense_variant	Exon 9 of 22		NP_001186930.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NOTCH2	ENST00000256646.7	c.1517A>C	p.Asn506Thr	missense_variant	Exon 9 of 34	1	NM_024408.4	ENSP00000256646.2
NOTCH2	ENST00000479412.2	n.1655A>C		non_coding_transcript_exon_variant	Exon 8 of 14	1
NOTCH2	ENST00000640021.1	n.*641A>C		non_coding_transcript_exon_variant	Exon 6 of 12	5		ENSP00000492223.1
NOTCH2	ENST00000640021.1	n.*641A>C		3_prime_UTR_variant	Exon 6 of 12	5		ENSP00000492223.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251288 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.050
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.83	D;D
Eigen	Benign	0.076
Eigen_PC	Benign	0.14
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.94	D;D
M_CAP	Benign	0.068	D
MetaRNN	Uncertain	0.56	D;D
MetaSVM	Uncertain	0.24	D
MutationAssessor	Pathogenic	3.1	M;.
PhyloP100		2.0
PrimateAI	Benign	0.44	T
PROVEAN	Uncertain	-3.4	D;.
REVEL	Uncertain	0.62
Sift	Benign	0.032	D;.
Sift4G	Uncertain	0.036	D;D
Polyphen		0.38	B;B
Vest4		0.43
MutPred		0.80		Loss of disorder (P = 0.1403);.;
MVP		0.94
MPC		0.82
ClinPred		0.65	D
GERP RS		4.4
Varity_R		0.45
gMVP		0.63
Mutation Taster		=75/25	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs73004269; hg19: chr1-120509049;