NM_024537.4:c.64G>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_024537.4(CARS2):c.64G>A(p.Gly22Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000544 in 1,406,926 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G22E) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0029 ( 3 hom., cov: 32)

Exomes 𝑓: 0.00025 ( 2 hom. )

Consequence

CARS2
NM_024537.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.177

Publications

1 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 -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0045067966).

BP6

Variant 13-110706030-C-T is Benign according to our data. Variant chr13-110706030-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 475633.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High Homozygotes in GnomAd4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CARS2	NM_024537.4 link	c.64G>A	p.Gly22Arg	missense_variant	Exon 1 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.64G>A	p.Gly22Arg	missense_variant	Exon 1 of 15	1	NM_024537.4	ENSP00000257347.4		Q9HA77

Frequencies

GnomAD3 genomes

AF:

0.00292

AC:

444

AN:

151904

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0103

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000787

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.000245

AC:

AN:

48956

AF XY:

0.000239

show subpopulations

Gnomad AFR exome

AF:

0.0146

Gnomad AMR exome

AF:

0.000373

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000255

AC:

320

AN:

1254914

Hom.:

Cov.:

AF XY:

0.000206

AC XY:

127

AN XY:

616874

show subpopulations

African (AFR)

AF:

0.0114

AC:

285

AN:

24946

American (AMR)

AF:

0.000381

AC:

AN:

18392

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19706

East Asian (EAS)

AF:

0.00

AC:

AN:

27252

South Asian (SAS)

AF:

0.0000165

AC:

AN:

60738

European-Finnish (FIN)

AF:

0.00

AC:

AN:

31536

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4944

European-Non Finnish (NFE)

AF:

0.00000197

AC:

AN:

1015904

Other (OTH)

AF:

0.000485

AC:

AN:

51496

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.523

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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:

0.00293

AC:

445

AN:

152012

Hom.:

Cov.:

AF XY:

0.00293

AC XY:

218

AN XY:

74332

show subpopulations

African (AFR)

AF:

0.0103

AC:

427

AN:

41504

American (AMR)

AF:

0.000786

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5164

South Asian (SAS)

AF:

0.000207

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10532

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67926

Other (OTH)

AF:

0.00237

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

124

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000556

Hom.:

Bravo

AF:

0.00324

ExAC

AF:

0.000246

AC:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Apr 23, 2020

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Combined oxidative phosphorylation defect type 27

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Benign:1

Feb 17, 2023

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

CARS2-related disorder

Benign:1

May 14, 2024

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

0.19

BayesDel_addAF

Benign

-0.50

BayesDel_noAF

Benign

-0.48

CADD

Benign

(source)

DANN

Benign

0.74

DEOGEN2

Benign

0.32

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.026

LIST_S2

Benign

0.44

M_CAP

Benign

0.0059

MetaRNN

Benign

0.0045

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.79

PhyloP100

-0.18

PrimateAI

Pathogenic

0.83

PROVEAN

Benign

-0.59

REVEL

Benign

0.093

Sift

Benign

0.15

Sift4G

Benign

0.14

Polyphen

0.0

Vest4

0.17

MutPred

0.40

Gain of helix (P = 0.0034);

MVP

0.33

MPC

2.2

ClinPred

0.010

GERP RS

-3.7

PromoterAI

-0.052

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.080

gMVP

0.51

Mutation Taster

=96/4

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over