rs754648501

Variant names:

• chr3-49096046-C-T
• rs754648501
• NM_005051.3:c.2311G>A

Variant summary

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

The NM_005051.3(QARS1):​c.2311G>A​(p.Asp771Asn) variant causes a missense change. The variant allele was found at a frequency of 0.0000131 in 152,184 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D771A) has been classified as Uncertain significance.

• Frequency: Genomes: 𝑓 0.000013 (0 hom., cov: 31)
• Consequence: QARS1 NM_005051.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.03
• Publications: 0 publications found

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, ClinGen
• microcephaly-short stature-intellectual disability-facial dysmorphism syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	QARS1	NM_005051.3	MANE Select	c.2311G>A	p.Asp771Asn	missense	Exon 24 of 24	NP_005042.1	P47897-1
	QARS1	NM_001272073.2		c.2278G>A	p.Asp760Asn	missense	Exon 24 of 24	NP_001259002.1	P47897-2
	QARS1	NR_073590.2		n.2286G>A		non_coding_transcript_exon	Exon 24 of 24

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	QARS1	ENST00000306125.12	TSL:1 MANE Select	c.2311G>A	p.Asp771Asn	missense	Exon 24 of 24	ENSP00000307567.6	P47897-1
	QARS1	ENST00000464962.6	TSL:1	c.1876G>A	p.Asp626Asn	missense	Exon 23 of 23	ENSP00000489011.1	B4DDN1
	QARS1	ENST00000965966.1		c.2434G>A	p.Asp812Asn	missense	Exon 24 of 24	ENSP00000636025.1

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152184 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000399 AC: 1 AN: 250894 AF XY: 0.00

Gnomad AFR exome AF: 0.0000617

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152184 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 74346

African (AFR) AF: 0.0000483 AC: 2 AN: 41448

American (AMR) AF: 0.00 AC: 0 AN: 15286

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5200

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10608

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68024

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000189

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Diffuse cerebral and cerebellar atrophy - intractable seizures - progressive microcephaly syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.69
BayesDel_addAF	Benign	-0.29	T
BayesDel_noAF	Benign	-0.48
CADD	Pathogenic	29
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.37	T
Eigen	Pathogenic	0.82
Eigen_PC	Pathogenic	0.83
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Benign	0.39	T
M_CAP	Benign	0.013	T
MetaRNN	Uncertain	0.52	D
MetaSVM	Benign	-0.99	T
MutationAssessor	Uncertain	2.3	M
PhyloP100		7.0
PrimateAI	Uncertain	0.67	T
PROVEAN	Uncertain	-4.1	D
REVEL	Benign	0.27
Sift	Benign	0.085	T
Sift4G	Uncertain	0.015	D
Polyphen		1.0	D
Vest4		0.72
MVP		0.62
MPC		1.0
ClinPred		0.98	D
GERP RS		6.1
Varity_R		0.36
gMVP		0.52
Mutation Taster		=48/52	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs754648501; hg19: chr3-49133479;