Genetic Variant WARS2:p.Trp13Arg (chr1-119140608-A-T) – ACMG Classification: Likely_pathogenic (7 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 8P and 1B. PS1_ModeratePM2PM5PP5_ModerateBP4

The NM_015836.4(WARS2):c.37T>A(p.Trp13Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000434 in 1,613,840 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. W13G) has been classified as Pathogenic.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

WARS2
NM_015836.4 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: -0.145

Publications

23 publications found

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:

WARS2-AS1 (HGNC:40612): (WARS2 antisense RNA 1)

WARS2-AS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

PS1

Transcript NM_015836.4 (WARS2) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-119140608-A-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 440915.

PP5

Variant 1-119140608-A-T is Pathogenic according to our data. Variant chr1-119140608-A-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3233281.Status of the report is criteria_provided_single_submitter, 1 stars.

BP4

Computational evidence support a benign effect (MetaRNN=0.08689004). . Strength limited to SUPPORTING due to the PP5.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015836.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
WARS2	NM_015836.4	MANE Select	c.37T>A	p.Trp13Arg	missense	Exon 1 of 6	NP_056651.1	Q9UGM6-1
WARS2	NM_001378228.1		c.37T>A	p.Trp13Arg	missense	Exon 1 of 6	NP_001365157.1	B7Z6G7
WARS2	NM_001378229.1		c.37T>A	p.Trp13Arg	missense	Exon 1 of 5	NP_001365158.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
WARS2	ENST00000235521.5	TSL:1 MANE Select	c.37T>A	p.Trp13Arg	missense	Exon 1 of 6	ENSP00000235521.4	Q9UGM6-1
WARS2	ENST00000369426.9	TSL:1	c.37T>A	p.Trp13Arg	missense	Exon 1 of 6	ENSP00000358434.5	Q9UGM6-2
WARS2-AS1	ENST00000425884.7	TSL:1	n.213A>T		non_coding_transcript_exon	Exon 1 of 4

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152276

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

250992

AF XY:

0.00

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000411

AC:

AN:

1461564

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727076

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44696

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26122

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86218

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53380

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111834

Other (OTH)

AF:

0.0000166

AC:

AN:

60386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152276

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74392

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41482

American (AMR)

AF:

0.00

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4836

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10632

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68048

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.625

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00000364

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000165

AC:

ClinVar

ClinVar submissions

Significance:Likely pathogenic

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Neurodevelopmental disorder, mitochondrial, with abnormal movements and lactic acidosis, with or without seizures (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.49

CADD

Benign

(source)

DANN

Benign

0.93

DEOGEN2

Benign

0.082

Eigen

Benign

-0.64

Eigen_PC

Benign

-0.52

FATHMM_MKL

Benign

0.093

LIST_S2

Benign

0.48

M_CAP

Benign

0.0039

MetaRNN

Benign

0.087

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.64

PhyloP100

-0.14

PrimateAI

Benign

0.38

PROVEAN

Benign

0.19

REVEL

Benign

0.049

Sift

Benign

0.32

Sift4G

Benign

0.12

Polyphen

0.0010

Vest4

0.38

MutPred

0.48

Gain of disorder (P = 1e-04)

MVP

0.15

MPC

0.74

ClinPred

0.15

GERP RS

0.72

PromoterAI

-0.0037

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.083

gMVP

0.72

Mutation Taster

=81/19

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over