9-136507952-C-T

Variant names:

• chr9-136507952-C-T
• rs372739350
• NM_017617.5:c.3510+3G>A

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_Moderate BP6 BS1 BS2

The NM_017617.5(NOTCH1):​c.3510+3G>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00019 in 1,612,284 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000085 (0 hom., cov: 34)
  • Exomes 𝑓: 0.00020 (0 hom.)
• Consequence: NOTCH1 NM_017617.5 splice_region, intron
• Scores: Splicing: ADA: 0.1540
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4 B:4
• Conservation: PhyloP100: 1.03
• Publications: 0 publications found

Genes affected

NOTCH1 (HGNC:7881): (notch receptor 1) This gene encodes a member of the NOTCH family of proteins. Members of this Type I 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 signaling is an evolutionarily conserved intercellular signaling pathway that regulates interactions between physically adjacent cells through binding of Notch family receptors to their cognate ligands. The encoded preproprotein is proteolytically processed in the trans-Golgi network to generate two polypeptide chains that heterodimerize to form the mature cell-surface receptor. This receptor plays a role in the development of numerous cell and tissue types. Mutations in this gene are associated with aortic valve disease, Adams-Oliver syndrome, T-cell acute lymphoblastic leukemia, chronic lymphocytic leukemia, and head and neck squamous cell carcinoma. [provided by RefSeq, Jan 2016]

NOTCH1 Gene-Disease associations (from GenCC):

• Adams-Oliver syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Illumina, Orphanet
• Adams-Oliver syndrome 5

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine
• aortic valve disease 1

  Inheritance: AD Classification: STRONG Submitted by: G2P, PanelApp Australia
• connective tissue disorder

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• leukodystrophy

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• familial bicuspid aortic valve

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial thoracic aortic aneurysm and aortic dissection

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Benign. The variant received -11 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.28).
• BP6: Variant 9-136507952-C-T is Benign according to our data. Variant chr9-136507952-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 477915.
• BS1: Variant frequency is greater than expected in population nfe. GnomAdExome4 allele frequency = 0.000201 (293/1460122) while in subpopulation NFE AF = 0.000263 (292/1111922). AF 95% confidence interval is 0.000238. There are 0 homozygotes in GnomAdExome4. There are 137 alleles in the male GnomAdExome4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High AC in GnomAd4 at 13 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NOTCH1	NM_017617.5	c.3510+3G>A		splice_region_variant, intron_variant	Intron 21 of 33	ENST00000651671.1	NP_060087.3
NOTCH1	XM_011518717.3	c.2787+3G>A		splice_region_variant, intron_variant	Intron 18 of 30		XP_011517019.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NOTCH1	ENST00000651671.1	c.3510+3G>A		splice_region_variant, intron_variant	Intron 21 of 33		NM_017617.5	ENSP00000498587.1

Frequencies

GnomAD3 genomes AF: 0.0000854 AC: 13 AN: 152162 Hom.: 0 Cov.: 34

Gnomad AFR AF: 0.0000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000162

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000809 AC: 20 AN: 247092 AF XY: 0.0000891

Gnomad AFR exome AF: 0.0000652

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: 0.000170

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000201 AC: 293 AN: 1460122 Hom.: 0 Cov.: 32 AF XY: 0.000189 AC XY: 137 AN XY: 726410

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51780

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.000263 AC: 292 AN: 1111922

Other (OTH) AF: 0.0000166 AC: 1 AN: 60376

GnomAD4 genome AF: 0.0000854 AC: 13 AN: 152162 Hom.: 0 Cov.: 34 AF XY: 0.0000807 AC XY: 6 AN XY: 74328

African (AFR) AF: 0.0000483 AC: 2 AN: 41434

American (AMR) AF: 0.00 AC: 0 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5174

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10630

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.000162 AC: 11 AN: 68024

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.000115 Hom.: 0

Bravo AF: 0.0000982

EpiCase AF: 0.000109

EpiControl AF: 0.000237

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4 Benign:4

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:1 Benign:4

Oct 27, 2020

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

Jan 01, 2018

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

Sep 15, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Familial thoracic aortic aneurysm and aortic dissection Uncertain:1

Aug 14, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.3510+3G>A intronic variant results from a G to A substitution 3 nucleotides after coding exon 21 in the NOTCH1 gene. This nucleotide position is not well conserved in available vertebrate species. In silico splice site analysis predicts that this alteration will not have any significant effect on splicing. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

Aortic valve disease 1;C4014970:Adams-Oliver syndrome 5 Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Adams-Oliver syndrome 5 Uncertain:1

Aug 04, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change falls in intron 21 of the NOTCH1 gene. It does not directly change the encoded amino acid sequence of the NOTCH1 protein. It affects a nucleotide within the consensus splice site. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with NOTCH1-related conditions. ClinVar contains an entry for this variant (Variation ID: 477915). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant is not likely to affect RNA splicing. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.28
CADD	Benign	19
DANN	Benign	0.95
PhyloP100		1.0
Mutation Taster		=18/82	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.15
dbscSNV1_RF	Benign	0.34
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: rs372739350; hg19: chr9-139402404; COSMIC: COSV104540441;