NM_001114753.3:c.662T>G

Variant names:

• chr9-127825722-A-C
• rs1554810378
• NM_001114753.3:c.662T>G

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM2 PM5 PP3_Moderate PP5_Moderate

The NM_001114753.3(ENG):​c.662T>G​(p.Leu221Arg) 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 pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L221P) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ENG NM_001114753.3 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 1.99
• 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
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr9-127825722-A-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 435060.Status of the report is reviewed_by_expert_panel, 3 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.892
• PP5: Variant 9-127825722-A-C is Pathogenic according to our data. Variant chr9-127825722-A-C is described in ClinVar as Pathogenic. ClinVar VariationId is 1404505.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001114753.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ENG	NM_001114753.3	MANE Select	c.662T>G	p.Leu221Arg	missense	Exon 5 of 15	NP_001108225.1
	ENG	NM_000118.4		c.662T>G	p.Leu221Arg	missense	Exon 5 of 14	NP_000109.1
	ENG	NM_001278138.2		c.116T>G	p.Leu39Arg	missense	Exon 5 of 15	NP_001265067.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ENG	ENST00000373203.9	TSL:1 MANE Select	c.662T>G	p.Leu221Arg	missense	Exon 5 of 15	ENSP00000362299.4
	ENG	ENST00000344849.5	TSL:1	c.662T>G	p.Leu221Arg	missense	Exon 5 of 14	ENSP00000341917.3
	ENG	ENST00000714047.1		c.662T>G	p.Leu221Arg	missense	Exon 5 of 15	ENSP00000519338.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Hereditary hemorrhagic telangiectasia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.86
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.82	D
Eigen	Uncertain	0.45
Eigen_PC	Uncertain	0.39
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.74	T
M_CAP	Benign	0.061	D
MetaRNN	Pathogenic	0.89	D
MetaSVM	Benign	-0.88	T
MutationAssessor	Uncertain	2.0	M
PhyloP100		2.0
PrimateAI	Uncertain	0.52	T
PROVEAN	Uncertain	-4.2	D
REVEL	Uncertain	0.38
Sift	Benign	0.036	D
Sift4G	Uncertain	0.0040	D
Polyphen		0.98	D
Vest4		0.90
MutPred		0.74		Gain of disorder (P = 0.0209)
MVP		0.94
MPC		0.93
ClinPred		0.95	D
GERP RS		4.4
Varity_R		0.79
gMVP		0.91
Mutation Taster		=14/86	disease causing

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: rs1554810378; hg19: chr9-130588001;