rs1329127701

Variant names:

• chr9-127824304-C-G
• rs1329127701
• NM_001114753.3:c.1134G>C

Your query was ambiguous. Multiple possible variants found:

• chr9-127824304-C-G
• chr9-127824304-C-T

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM2 PP3_Strong PP5_Moderate

The NM_001114753.3(ENG):​c.1134G>C​(p.Ala378Ala) variant causes a splice region, synonymous 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. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. A378A) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 30)
• Consequence: ENG NM_001114753.3 splice_region, synonymous
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 1.96
• Publications: 0 publications found

Genes affected

ENG (HGNC:3349): (endoglin) This gene encodes a homodimeric transmembrane protein which is a major glycoprotein of the vascular endothelium. This protein is a component of the transforming growth factor beta receptor complex and it binds to the beta1 and beta3 peptides with high affinity. Mutations in this gene cause hereditary hemorrhagic telangiectasia, also known as Osler-Rendu-Weber syndrome 1, an autosomal dominant multisystemic vascular dysplasia. This gene may also be involved in preeclampsia and several types of cancer. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2013]

ENG Gene-Disease associations (from GenCC):

• telangiectasia, hereditary hemorrhagic, type 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp, ClinGen
• hereditary hemorrhagic telangiectasia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• juvenile polyposis syndrome

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 9-127824304-C-G is Pathogenic according to our data. Variant chr9-127824304-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 1074391.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ENG	NM_001114753.3	c.1134G>C	p.Ala378Ala	splice_region_variant, synonymous_variant	Exon 8 of 15	ENST00000373203.9	NP_001108225.1
ENG	NM_000118.4	c.1134G>C	p.Ala378Ala	splice_region_variant, synonymous_variant	Exon 8 of 14		NP_000109.1
ENG	NM_001278138.2	c.588G>C	p.Ala196Ala	splice_region_variant, synonymous_variant	Exon 8 of 15		NP_001265067.1
ENG	NM_001406715.1	c.1134G>C	p.Ala378Ala	synonymous_variant	Exon 8 of 8		NP_001393644.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ENG	ENST00000373203.9	c.1134G>C	p.Ala378Ala	splice_region_variant, synonymous_variant	Exon 8 of 15	1	NM_001114753.3	ENSP00000362299.4

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 30

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary hemorrhagic telangiectasia Pathogenic:1

Aug 21, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change affects codon 378 of the ENG mRNA. It is a 'silent' change, meaning that it does not change the encoded amino acid sequence of the ENG protein. This variant also falls at the last nucleotide of exon 8, which is part of the consensus splice site for this exon. This variant is not present in population databases (gnomAD no frequency). This variant has been observed in individuals with hereditary hemorrhagic telangiectasia (PMID: 15517393, 20414677, 21158752; internal data). ClinVar contains an entry for this variant (Variation ID: 1074391). 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 may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.47
CADD	Uncertain	24
DANN	Benign	0.83
PhyloP100		2.0

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.99
SpliceAI score (max)		0.68		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.40		Position offset: 24
DS_DL_spliceai		0.68		Position offset: 0

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

Other links and lift over

dbSNP: rs1329127701; hg19: chr9-130586583;