rs746514660

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_020745.4(AARS2):c.647dupG(p.Cys218LeufsTer6) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000917 in 1,613,962 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000096 ( 0 hom. )

Consequence

AARS2
NM_020745.4 frameshift

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:8

Conservation

PhyloP100: 7.91

Variant links:

Genes affected

AARS2 (HGNC:21022): (alanyl-tRNA synthetase 2, mitochondrial) The protein encoded by this gene belongs to the class-II aminoacyl-tRNA synthetase family. Aminoacyl-tRNA synthetases play critical roles in mRNA translation by charging tRNAs with their cognate amino acids. The encoded protein is a mitochondrial enzyme that specifically aminoacylates alanyl-tRNA. Mutations in this gene are a cause of combined oxidative phosphorylation deficiency 8. [provided by RefSeq, Dec 2011]

AARS2 links:

ENSG00000272442 (HGNC:):

ENSG00000272442 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 6-44311095-G-GC is Pathogenic according to our data. Variant chr6-44311095-G-GC is described in ClinVar as [Pathogenic]. Clinvar id is 143044.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AARS2	NM_020745.4 link	c.647dupG	p.Cys218LeufsTer6	frameshift_variant	Exon 4 of 22	ENST00000244571.5	NP_065796.2	Q5JTZ9
AARS2	XM_005249245.4 link	c.647dupG	p.Cys218LeufsTer6	frameshift_variant	Exon 4 of 20		XP_005249302.1
AARS2	XR_007059282.1 link	n.671dupG		non_coding_transcript_exon_variant	Exon 4 of 14
LOC124901322	XR_007059594.1 link	n.301-3054dupC		intron_variant	Intron 2 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AARS2	ENST00000244571.5 link	c.647dupG	p.Cys218LeufsTer6	frameshift_variant	Exon 4 of 22	1	NM_020745.4	ENSP00000244571.4		Q5JTZ9
ENSG00000272442	ENST00000505802.1 link	n.*449+3455dupC		intron_variant	Intron 3 of 9	2		ENSP00000424257.1		H0Y9J4

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.000118

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000717

AC:

AN:

251070

Hom.:

AF XY:

0.0000442

AC XY:

AN XY:

135826

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000141

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000958

AC:

140

AN:

1461788

Hom.:

Cov.:

AF XY:

0.0000935

AC XY:

AN XY:

727180

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000122

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74330

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000174

Hom.:

Bravo

AF:

0.0000604

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Combined oxidative phosphorylation defect type 8

Pathogenic:4

Dec 16, 2022

Institute of Human Genetics, Heidelberg University

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 06, 2021

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as pathogenic. Following criteria are met: 0102 - Loss of function is a likely mechanism of disease in this gene and is associated with combined oxidative phosphorylation deficiency 8 (MIM#614096) and leukoencephalopathy, progressive, with ovarian failure (MIM#615889) (PMIDs: 28633377, 30285085, 24808023). (I) 0106 - This gene is associated with autosomal recessive disease. (I) 0201 - Variant is predicted to cause nonsense-mediated decay (NMD) and loss of protein (premature termination codon is located at least 54 nucleotides upstream of the final exon-exon junction). (SP) 0251 - This variant is heterozygous. (I) 0304 - Variant is present in gnomAD (v2) <0.01 for a recessive condition (20 heterozygotes, 0 homozygotes). (SP) 0701 - Other NMD-predicted variants comparable to the one identified in this case have very strong previous evidence for pathogenicity. At least nine NMD-predicted variants along AARS2 have been reported in affected individuals (ClinVar, Decipher, PMID: 31106991). (SP) 0802 - This variant has moderate previous evidence of pathogenicity in unrelated individuals. This variant has been reported in individuals diagnosed with severe infantile cardiomyopathy, progressive leukoencephalopathy with ovarian failure and primary pulmonary hypoplasia (ClinVar; PMIDs: 25058219, 29971983, 30819764). (SP) 1007 - No published functional evidence has been identified for this variant. (I) 1201 - Heterozygous variant detected in trans with a second pathogenic heterozygous variant (NM_020745.4:c.1774C>T; p.(Arg592Trp)) in a recessive disease. (SP) 1205 - This variant has been shown to be maternally inherited. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

Jul 02, 2014

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Aug 17, 2020

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was determined to be pathogenic according to ACMG Guidelines, 2015 [PMID:25741868]. -

not provided

Pathogenic:3

Feb 08, 2016

Eurofins Ntd Llc (ga)

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 12, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Cys218Leufs*6) in the AARS2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in AARS2 are known to be pathogenic (PMID: 24808023, 30285085, 30819764). This variant is present in population databases (rs746514660, gnomAD 0.01%). This premature translational stop signal has been observed in individual(s) with multiple respiratory chain complex defects (PMID: 25058219). This variant is also known as c.647_648insG. ClinVar contains an entry for this variant (Variation ID: 143044). For these reasons, this variant has been classified as Pathogenic. -

Dec 10, 2024

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 30819764, 34784527, 29971983, 34484863, 25058219) -

Pulmonary hypoplasia

Pathogenic:1

Feb 05, 2019

Pediatric Genomics Discovery Program, Yale University

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over