rs786205226

chr12-11886025-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PM5 PP3_Moderate

The NM_001987.5(ETV6):c.1252A>G(p.Arg418Gly) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R418M) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ETV6 NM_001987.5 missense, splice_region
• Scores: Splicing: ADA: 0.9999
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 7.33

Genes affected

ETV6 (HGNC:3495): (ETS variant transcription factor 6) This gene encodes an ETS family transcription factor. The product of this gene contains two functional domains: a N-terminal pointed (PNT) domain that is involved in protein-protein interactions with itself and other proteins, and a C-terminal DNA-binding domain. Gene knockout studies in mice suggest that it is required for hematopoiesis and maintenance of the developing vascular network. This gene is known to be involved in a large number of chromosomal rearrangements associated with leukemia and congenital fibrosarcoma. [provided by RefSeq, Sep 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM1: In a DNA_binding_region ETS (size 81) in uniprot entity ETV6_HUMAN there are 9 pathogenic changes around while only 1 benign (90%) in NM_001987.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr12-11890941-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 3064526.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. Scorers claiming Uncertain: max_spliceai. No scorers claiming Benign.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ETV6	NM_001987.5	c.1252A>G	p.Arg418Gly	missense_variant, splice_region_variant	7/8	ENST00000396373.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ETV6	ENST00000396373.9	c.1252A>G	p.Arg418Gly	missense_variant, splice_region_variant	7/8	1	NM_001987.5	P1
ETV6	ENST00000266427.3	c.91A>G	p.Arg31Gly	missense_variant, splice_region_variant	1/2	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 27

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Thrombocytopenia 5 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

May 01, 2015

- -

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 21, 2023

The p.R418G variant (also known as c.1252A>G), located in coding exon 7 of the ETV6 gene, results from an A to G substitution at nucleotide position 1252. The arginine at codon 418 is replaced by glycine, an amino acid with dissimilar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. functional studies have demonstrated that this alteration impacts the ability of ETV6 to bind DNA and repress target gene function (Noetzli L et al. Nat Genet 2015 May;47(5):535-538.). Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Pathogenic	0.14
Cadd	Pathogenic	33
Dann	Benign	0.97
DEOGEN2	Pathogenic	0.93	D
Eigen	Pathogenic	0.82
Eigen_PC	Pathogenic	0.75
FATHMM_MKL	Benign	0.72	D
LIST_S2	Uncertain	0.93	D
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Benign	-0.79	T
MutationAssessor	Pathogenic	3.2	M
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-5.8	D
REVEL	Pathogenic	0.72
Sift	Uncertain	0.0020	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.89
MutPred		0.66		Loss of MoRF binding (P = 0.0055);
MVP		0.87
MPC		3.2
ClinPred		1.0	D
GERP RS		5.0
Varity_R		0.93
gMVP		0.95

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.98
SpliceAI score (max)		0.47		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.47		Position offset: 1

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

Publications

LitVar

Other links and lift over

dbSNP: rs786205226; hg19: chr12-12038959; COSMIC: COSV56766017;