NM_024537.4:c.1054+8G>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.1054+8G>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000772 in 1,609,788 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0039 ( 3 hom., cov: 33)

Exomes 𝑓: 0.00044 ( 7 hom. )

Consequence

CARS2
NM_024537.4 splice_region, intron

Scores

Splicing: ADA: 0.00001251

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: -0.943

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, G2P, Laboratory for Molecular Medicine
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 (BayesDel_noAF=-0.85).

BP6

Variant 13-110651026-C-T is Benign according to our data. Variant chr13-110651026-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 382783.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High Homozygotes in GnomAd4 at 3 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024537.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
CARS2	NM_024537.4	MANE Select	c.1054+8G>A	splice_region intron	N/A	NP_078813.1	Q9HA77
CARS2	NM_001352252.2		c.268+8G>A	splice_region intron	N/A	NP_001339181.1
CARS2	NR_147941.1		n.1025+8G>A	splice_region intron	N/A

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
CARS2	ENST00000257347.9	TSL:1 MANE Select	c.1054+8G>A	splice_region intron	N/A	ENSP00000257347.4	Q9HA77
CARS2	ENST00000939453.1		c.1054+8G>A	splice_region intron	N/A	ENSP00000609512.1
CARS2	ENST00000890914.1		c.1048+8G>A	splice_region intron	N/A	ENSP00000560973.1

Frequencies

GnomAD3 genomes

AF:

0.00391

AC:

595

AN:

152162

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0134

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00223

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.000981

AC:

244

AN:

248602

AF XY:

0.000697

show subpopulations

Gnomad AFR exome

AF:

0.0134

Gnomad AMR exome

AF:

0.000526

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000383

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000178

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.000444

AC:

647

AN:

1457508

Hom.:

Cov.:

AF XY:

0.000360

AC XY:

261

AN XY:

725240

show subpopulations

African (AFR)

AF:

0.0156

AC:

522

AN:

33370

American (AMR)

AF:

0.000674

AC:

AN:

44518

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26094

East Asian (EAS)

AF:

0.000202

AC:

AN:

39672

South Asian (SAS)

AF:

0.0000581

AC:

AN:

86068

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52466

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5760

European-Non Finnish (NFE)

AF:

0.0000117

AC:

AN:

1109270

Other (OTH)

AF:

0.00114

AC:

AN:

60290

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

110

138

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:

0.00391

AC:

596

AN:

152280

Hom.:

Cov.:

AF XY:

0.00381

AC XY:

284

AN XY:

74448

show subpopulations

African (AFR)

AF:

0.0134

AC:

555

AN:

41556

American (AMR)

AF:

0.00222

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000193

AC:

AN:

5174

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68020

Other (OTH)

AF:

0.00237

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.509

Heterozygous variant carriers

104

139

174

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:

0.00171

Hom.:

Bravo

AF:

0.00469

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

CARS2-related disorder (1)

Combined oxidative phosphorylation defect type 27 (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.85

CADD

Benign

2.0

(source)

DANN

Benign

0.48

PhyloP100

-0.94

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000013

dbscSNV1_RF

Benign

0.0

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

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over