chr7-30594745-T-C

Position:

• chr7-30594745-T-C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_001316772.1(GARS1):​c.-339T>C variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00555 in 603,942 control chromosomes in the GnomAD database, including 21 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0044 (8 hom., cov: 32)
  • Exomes 𝑓: 0.0059 (13 hom.)
• Consequence: GARS1 NM_001316772.1 5_prime_UTR
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6
• Conservation: PhyloP100: -0.177

Genes affected

GARS1 (HGNC:4162): (glycyl-tRNA synthetase 1) This gene encodes glycyl-tRNA synthetase, one of the aminoacyl-tRNA synthetases that charge tRNAs with their cognate amino acids. The encoded enzyme is an (alpha)2 dimer which belongs to the class II family of tRNA synthetases. It has been shown to be a target of autoantibodies in the human autoimmune diseases, polymyositis or dermatomyositis. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2015]

GARS1-DT (HGNC:48951): (GARS1 divergent transcript)

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.76).
• BP6: Variant 7-30594745-T-C is Benign according to our data. Variant chr7-30594745-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 359996.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.0044 (669/152208) while in subpopulation EAS AF= 0.0124 (64/5174). AF 95% confidence interval is 0.00994. There are 8 homozygotes in gnomad4. There are 343 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 669 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GARS1	NM_001316772.1	c.-339T>C		5_prime_UTR_variant	1/17

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GARS1	ENST00000675051.1	c.22-4051T>C		intron_variant
GARS1-DT	ENST00000578994.5	n.65A>G		non_coding_transcript_exon_variant	1/5	4
GARS1-DT	ENST00000579174.5	n.64A>G		non_coding_transcript_exon_variant	1/6	3

Frequencies

GnomAD3 genomes AF: 0.00441 AC: 670 AN: 152090 Hom.: 8 Cov.: 32

Gnomad AFR AF: 0.00106

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00236

Gnomad ASJ AF: 0.00259

Gnomad EAS AF: 0.0125

Gnomad SAS AF: 0.00186

Gnomad FIN AF: 0.0130

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00532

Gnomad OTH AF: 0.00335

GnomAD4 exome AF: 0.00594 AC: 2685 AN: 451734 Hom.: 13 Cov.: 5 AF XY: 0.00568 AC XY: 1355 AN XY: 238612

Gnomad4 AFR exome AF: 0.00101

Gnomad4 AMR exome AF: 0.00155

Gnomad4 ASJ exome AF: 0.00418

Gnomad4 EAS exome AF: 0.0185

Gnomad4 SAS exome AF: 0.00212

Gnomad4 FIN exome AF: 0.0116

Gnomad4 NFE exome AF: 0.00540

Gnomad4 OTH exome AF: 0.00426

GnomAD4 genome AF: 0.00440 AC: 669 AN: 152208 Hom.: 8 Cov.: 32 AF XY: 0.00461 AC XY: 343 AN XY: 74426

Gnomad4 AFR AF: 0.00106

Gnomad4 AMR AF: 0.00235

Gnomad4 ASJ AF: 0.00259

Gnomad4 EAS AF: 0.0124

Gnomad4 SAS AF: 0.00186

Gnomad4 FIN AF: 0.0130

Gnomad4 NFE AF: 0.00532

Gnomad4 OTH AF: 0.00331

Alfa AF: 0.00343 Hom.: 0

Bravo AF: 0.00348

Asia WGS AF: 0.00520 AC: 18 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

Benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Apr 01, 2023	GARS1: BS1, BS2; GARS1-DT: BS1, BS2 -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 31, 2018	- -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Distal spinal muscular atrophy Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Charcot-Marie-Tooth disease type 2D Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Neuronopathy, distal hereditary motor, type 5A Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.76
CADD	Benign	12
DANN	Benign	0.70

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: rs78980639; hg19: chr7-30634361;