11-3012259-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001014437.3(CARS1):c.2004G>T(p.Met668Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CARS1 NM_001014437.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.99

Genes affected

CARS1 (HGNC:1493): (cysteinyl-tRNA synthetase 1) This gene encodes a class 1 aminoacyl-tRNA synthetase, cysteinyl-tRNA synthetase. Each of the twenty aminoacyl-tRNA synthetases catalyzes the aminoacylation of a specific tRNA or tRNA isoaccepting family with the cognate amino acid. This gene is one of several located near the imprinted gene domain on chromosome 11p15.5, an important tumor-suppressor gene region. Alterations in this region have been associated with Beckwith-Wiedemann syndrome, Wilms tumor, rhabdomyosarcoma, adrenocortical carcinoma, and lung, ovarian and breast cancers. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Aug 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CARS1	NM_001014437.3	c.2004G>T	p.Met668Ile	missense_variant	18/23	ENST00000380525.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CARS1	ENST00000380525.9	c.2004G>T	p.Met668Ile	missense_variant	18/23	1	NM_001014437.3	P3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 30, 2023

The c.2004G>T (p.M668I) alteration is located in exon 18 (coding exon 18) of the CARS gene. This alteration results from a G to T substitution at nucleotide position 2004, causing the methionine (M) at amino acid position 668 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Benign	-0.014	T
BayesDel_noAF	Benign	-0.26
Cadd	Uncertain	24
Dann	Uncertain	1.0
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.45
FATHMM_MKL	Uncertain	0.97	D
M_CAP	Benign	0.024	T
MetaRNN	Uncertain	0.44	T;T;T;T
MetaSVM	Benign	-0.65	T
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.60	T
PROVEAN	Uncertain	-2.5	D;D;D;.
REVEL	Benign	0.20
Sift	Uncertain	0.0040	D;D;D;.
Sift4G	Uncertain	0.012	D;D;D;D
Polyphen		0.76, 0.97, 0.25	.;P;D;B
Vest4		0.60
MutPred		0.39		.;Loss of glycosylation at T583 (P = 0.0998);Loss of glycosylation at T583 (P = 0.0998);.;
MVP		0.61
MPC		0.38
ClinPred		0.94	D
GERP RS		4.9
Varity_R		0.61
gMVP		0.62

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr11-3033489;