11-3015812-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BS1_Supporting

The NM_001014437.3(CARS1):c.1955T>A(p.Phe652Tyr) variant causes a missense change. The variant allele was found at a frequency of 0.000197 in 1,614,168 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.00020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00020 (1 hom.)
• Consequence: CARS1 NM_001014437.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 6.33

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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BS1: Variant frequency is greater than expected in population mid. gnomad4_exome allele frequency = 0.000197 (288/1461864) while in subpopulation MID AF= 0.00971 (56/5768). AF 95% confidence interval is 0.00768. There are 1 homozygotes in gnomad4_exome. There are 150 alleles in male gnomad4_exome subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CARS1	NM_001014437.3	c.1955T>A	p.Phe652Tyr	missense_variant	17/23	ENST00000380525.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CARS1	ENST00000380525.9	c.1955T>A	p.Phe652Tyr	missense_variant	17/23	1	NM_001014437.3	P3

Frequencies

GnomAD3 genomes AF: 0.000197 AC: 30 AN: 152186 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000724

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00949

Gnomad NFE AF: 0.000250

Gnomad OTH AF: 0.000957

GnomAD3 exomes AF: 0.000119 AC: 30 AN: 251420 Hom.: 0 AF XY: 0.000110 AC XY: 15 AN XY: 135906

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000173

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000163

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000150

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.000197 AC: 288 AN: 1461864 Hom.: 1 Cov.: 32 AF XY: 0.000206 AC XY: 150 AN XY: 727238

Gnomad4 AFR exome AF: 0.000209

Gnomad4 AMR exome AF: 0.000246

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000139

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000162

Gnomad4 OTH exome AF: 0.000364

GnomAD4 genome AF: 0.000197 AC: 30 AN: 152304 Hom.: 0 Cov.: 32 AF XY: 0.000282 AC XY: 21 AN XY: 74482

Gnomad4 AFR AF: 0.0000722

Gnomad4 AMR AF: 0.000261

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000250

Gnomad4 OTH AF: 0.000947

Alfa AF: 0.000338 Hom.: 0

Bravo AF: 0.000204

ExAC AF: 0.000148 AC: 18

Asia WGS AF: 0.000577 AC: 2 AN: 3478

EpiCase AF: 0.000273

EpiControl AF: 0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 19, 2022

The c.1955T>A (p.F652Y) alteration is located in exon 17 (coding exon 17) of the CARS gene. This alteration results from a T to A substitution at nucleotide position 1955, causing the phenylalanine (F) at amino acid position 652 to be replaced by a tyrosine (Y). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Microcephaly, developmental delay, and brittle hair syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Department Of Genetics, Sultan Qaboos University Hospital, Sultan Qaboos University

Jun 30, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.40
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.24
Cadd	Benign	23
Dann	Uncertain	0.99
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Benign	0.071	D
MetaRNN	Uncertain	0.48	T;T;T;T
MetaSVM	Benign	-0.43	T
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.63	T
PROVEAN	Uncertain	-2.6	D;D;D;.
REVEL	Uncertain	0.31
Sift	Uncertain	0.012	D;D;D;.
Sift4G	Uncertain	0.035	D;D;D;D
Polyphen		1.0, 0.96	.;D;D;D
Vest4		0.58
MVP		0.57
MPC		0.94
ClinPred		0.90	D
GERP RS		3.7
RBP_binding_hub_radar		0.97
RBP_regulation_power_radar		2.7
Varity_R		0.38
gMVP		0.60

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

LitVar

Other links and lift over

dbSNP: rs781761299; hg19: chr11-3037042; COSMIC: COSV53458266; COSMIC: COSV53458266;