rs188068027

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_024537.4(CARS2):c.1681A>G(p.Lys561Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00106 in 1,613,884 control chromosomes in the GnomAD database, including 15 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0053 ( 5 hom., cov: 33)

Exomes 𝑓: 0.00062 ( 10 hom. )

Consequence

CARS2
NM_024537.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 0.359

Publications

2 publications found

Variant links:

Genes affected

CARS2 (HGNC:25695): (cysteinyl-tRNA synthetase 2, mitochondrial) This gene encodes a putative member of the class I family of aminoacyl-tRNA synthetases. These enzymes play a critical role in protein biosynthesis by charging tRNAs with their cognate amino acids. This protein is encoded by the nuclear genome but is likely to be imported to the mitochondrion where it is thought to catalyze the ligation of cysteine to tRNA molecules. A splice-site mutation in this gene has been associated with a novel progressive myoclonic epilepsy disease with similar symptoms to MERRF syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jun 2017]

CARS2 Gene-Disease associations (from GenCC):

combined oxidative phosphorylation defect type 27
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Laboratory for Molecular Medicine, G2P
mitochondrial disease
Inheritance: AR Classification: MODERATE Submitted by: ClinGen

CARS2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0037527084).

BP6

Variant 13-110641551-T-C is Benign according to our data. Variant chr13-110641551-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 381419.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00531 (809/152306) while in subpopulation AFR AF = 0.0182 (757/41556). AF 95% confidence interval is 0.0171. There are 5 homozygotes in GnomAd4. There are 378 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 5 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CARS2	NM_024537.4 link	c.1681A>G	p.Lys561Glu	missense_variant	Exon 15 of 15	ENST00000257347.9	NP_078813.1	Q9HA77B7Z7E6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CARS2	ENST00000257347.9 link	c.1681A>G	p.Lys561Glu	missense_variant	Exon 15 of 15	1	NM_024537.4	ENSP00000257347.4		Q9HA77

Frequencies

GnomAD3 genomes

AF:

0.00532

AC:

809

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0183

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00229

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00526

GnomAD2 exomes

AF:

0.00128

AC:

323

AN:

251488

AF XY:

0.000934

show subpopulations

Gnomad AFR exome

AF:

0.0178

Gnomad AMR exome

AF:

0.000636

Gnomad ASJ exome

AF:

0.000198

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000439

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000619

AC:

905

AN:

1461578

Hom.:

Cov.:

AF XY:

0.000501

AC XY:

364

AN XY:

727118

show subpopulations

African (AFR)

AF:

0.0216

AC:

723

AN:

33476

American (AMR)

AF:

0.000805

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.000497

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000580

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53400

Middle Eastern (MID)

AF:

0.000693

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000180

AC:

AN:

1111744

Other (OTH)

AF:

0.00172

AC:

104

AN:

60378

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

Heterozygous variant carriers

134

178

223

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00531

AC:

809

AN:

152306

Hom.:

Cov.:

AF XY:

0.00508

AC XY:

378

AN XY:

74480

show subpopulations

African (AFR)

AF:

0.0182

AC:

757

AN:

41556

American (AMR)

AF:

0.00229

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00115

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68028

Other (OTH)

AF:

0.00520

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

116

155

194

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00195

Hom.:

Bravo

AF:

0.00617

ExAC

AF:

0.00160

AC:

194

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Apr 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

CARS2: BP4, BS1, BS2 -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Mar 13, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Combined oxidative phosphorylation defect type 27

Benign:2

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 19, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

CARS2-related disorder

Benign:1

Apr 10, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.086

BayesDel_addAF

Benign

-0.55

BayesDel_noAF

Benign

-0.55

CADD

Benign

6.7

(source)

DANN

Benign

0.90

DEOGEN2

Benign

0.16

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.43

LIST_S2

Benign

0.39

MetaRNN

Benign

0.0038

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.1

PhyloP100

0.36

PrimateAI

Benign

0.37

PROVEAN

Benign

-1.3

REVEL

Benign

0.033

Sift

Uncertain

0.011

Sift4G

Benign

0.093

Polyphen

0.068

Vest4

0.17

MVP

0.21

MPC

0.24

ClinPred

0.0049

GERP RS

0.23

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.078

gMVP

0.22

Mutation Taster

=96/4

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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rs188068027

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over