rs746478253

Positions:

chr1-119033196-CG-C

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PVS1_StrongPM2PP5

The NM_015836.4(WARS2):c.797del(p.Pro266ArgfsTer10) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000242 in 1,614,130 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. P266P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

WARS2
NM_015836.4 frameshift

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:5U:2

Conservation

PhyloP100: 9.30

Variant links:

Genes affected

WARS2 (HGNC:12730): (tryptophanyl tRNA synthetase 2, mitochondrial) Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate amino acid. Because of their central role in linking amino acids with nucleotide triplets contained in tRNAs, aminoacyl-tRNA synthetases are thought to be among the first proteins that appeared in evolution. Two forms of tryptophanyl-tRNA synthetase exist, a cytoplasmic form, named WARS, and a mitochondrial form, named WARS2. This gene encodes the mitochondrial tryptophanyl-tRNA synthetase. Two alternative transcripts encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

WARS2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 6 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 1-119033196-CG-C is Pathogenic according to our data. Variant chr1-119033196-CG-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 440918.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=4, Uncertain_significance=2}. Variant chr1-119033196-CG-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
WARS2	NM_015836.4 linkuse as main transcript	c.797del	p.Pro266ArgfsTer10	frameshift_variant	6/6	ENST00000235521.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
WARS2	ENST00000235521.5 linkuse as main transcript	c.797del	p.Pro266ArgfsTer10	frameshift_variant	6/6	1	NM_015836.4	P1	Q9UGM6-1
WARS2	ENST00000369426.9 linkuse as main transcript	c.*163del		3_prime_UTR_variant	6/6	1			Q9UGM6-2

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152258

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000359

AC:

AN:

250918

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135680

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000795

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000246

AC:

AN:

1461872

Hom.:

Cov.:

AF XY:

0.0000289

AC XY:

AN XY:

727238

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000315

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152258

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74398

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:5Uncertain:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Neurodevelopmental disorder, mitochondrial, with abnormal movements and lactic acidosis, with or without seizures

Pathogenic:2Uncertain:1

Likely pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	May 05, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	MGZ Medical Genetics Center	Apr 13, 2022	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Oct 10, 2017	- -

not provided

Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Oct 21, 2022	Frameshift variant predicted to result in protein truncation as the last 95 amino acids are replaced with 9 different amino acids, although loss-of-function variants have not been reported downstream of this position in the protein; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 6447871, 17604309, 24639874, 28236339, 28905505, 28650581, 25385316, 25361775, 25130867, 27389904, 10828066, 15779907, 12557294, 2999114, 7219534, 6997870, 6932013, 31628766, 31617452, 31684799, 31282308, 29783990) -
Likely pathogenic, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Aug 29, 2018	DNA sequence analysis of the WARS2 gene demonstrated a one base pair deletion in exon 6, c.797del. This deletion is predicted to result in a frameshift and creation of a premature stop codon nine amino acids downstream, p.Pro266Argfs*10. The c.797del has been described at a low population frequency of 0.004% in gnomAD. The second sequence change identified, c.938A>T, occurs in exon 6 and results in an amino acid change, p.Lys313Met. The p.Lys313Met change affects a moderately conserved amino acid residue located in a domain of the WARS2 protein that is known to be functional. This sequence change has been described in the gnomAD database with a low population frequency of 0.02% (dbSNP rs145867327). The c.797del and c.938A>T sequence changes have been reported in the trans state (on different chromosomes) in two affected siblings with WARS2-related phenotypes (Wortmann et al., 2017. Hum Mutat 38: 1786-1795). -

Parkinsonism-dystonia 3, childhood-onset

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

May 05, 2022

- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 15, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over