Genetic Variant NM_005051.3:c.771G>A (chr3-49101638-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is . The variant received 2 ACMG points: 2P and 0B. PM2

The NM_005051.3(QARS1):c.771G>A(p.Leu257Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 33)

Consequence

QARS1
NM_005051.3 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.50

Publications

0 publications found

Variant links:

Genes affected

QARS1 (HGNC:9751): (glutaminyl-tRNA synthetase 1) Aminoacyl-tRNA synthetases catalyze the aminoacylation of tRNA by their cognate amino acid. Because of their central role in linking amino acids with nucleotide triplets contained in tRNAs, aminoacyl-tRNA synthetases are thought to be among the first proteins that appeared in evolution. In metazoans, 9 aminoacyl-tRNA synthetases specific for glutamine (gln), glutamic acid (glu), and 7 other amino acids are associated within a multienzyme complex. Although present in eukaryotes, glutaminyl-tRNA synthetase (QARS) is absent from many prokaryotes, mitochondria, and chloroplasts, in which Gln-tRNA(Gln) is formed by transamidation of the misacylated Glu-tRNA(Gln). Glutaminyl-tRNA synthetase belongs to the class-I aminoacyl-tRNA synthetase family. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2013]

QARS1 Gene-Disease associations (from GenCC):

diffuse cerebral and cerebellar atrophy - intractable seizures - progressive microcephaly syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, PanelApp Australia, ClinGen
microcephaly-short stature-intellectual disability-facial dysmorphism syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

QARS1 links:

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new If you want to explore the variant's impact on the transcript NM_005051.3, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005051.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
QARS1	NM_005051.3	MANE Select	c.771G>A	p.Leu257Leu	synonymous	Exon 9 of 24	NP_005042.1	P47897-1
QARS1	NM_001272073.2		c.738G>A	p.Leu246Leu	synonymous	Exon 9 of 24	NP_001259002.1	P47897-2
QARS1	NR_073590.2		n.746G>A		non_coding_transcript_exon	Exon 9 of 24

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
QARS1	ENST00000306125.12	TSL:1 MANE Select	c.771G>A	p.Leu257Leu	synonymous	Exon 9 of 24	ENSP00000307567.6	P47897-1
QARS1	ENST00000464962.6	TSL:1	c.336G>A	p.Leu112Leu	synonymous	Exon 8 of 23	ENSP00000489011.1	B4DDN1
QARS1	ENST00000965966.1		c.894G>A	p.Leu298Leu	synonymous	Exon 9 of 24	ENSP00000636025.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.31

CADD

Benign

(source)

DANN

Benign

0.68

PhyloP100

1.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.50

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.50

Position offset: -18

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over