Genetic Variant AARS2:p.Met950Ile (chr6-44300655-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_020745.4(AARS2):c.2850G>C(p.Met950Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,480 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

AARS2
NM_020745.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.53

Publications

0 publications found

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:

TMEM151B (HGNC:21315): (transmembrane protein 151B) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

TMEM151B links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.19625872).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AARS2	NM_020745.4 link	c.2850G>C	p.Met950Ile	missense_variant	Exon 22 of 22	ENST00000244571.5	NP_065796.2
AARS2	XM_005249245.4 link	c.2559G>C	p.Met853Ile	missense_variant	Exon 20 of 20		XP_005249302.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
AARS2	ENST00000244571.5 link	c.2850G>C	p.Met950Ile	missense_variant	Exon 22 of 22	1	NM_020745.4	ENSP00000244571.4
ENSG00000272442	ENST00000505802.1 link	n.313-6288C>G		intron_variant	Intron 1 of 9	2		ENSP00000424257.1
AARS2	ENST00000491573.1 link	n.652G>C		non_coding_transcript_exon_variant	Exon 2 of 2	2
TMEM151B	ENST00000438774.2 link	c.577-6288C>G		intron_variant	Intron 2 of 2	3		ENSP00000409337.2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461480

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727056

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53030

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111994

Other (OTH)

AF:

0.00

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.52

BayesDel_addAF

Benign

-0.082

BayesDel_noAF

Benign

-0.36

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.010

Eigen

Benign

-0.058

Eigen_PC

Benign

0.057

FATHMM_MKL

Uncertain

0.85

LIST_S2

Benign

0.74

M_CAP

Benign

0.030

MetaRNN

Benign

0.20

MetaSVM

Benign

-1.0

MutationAssessor

Benign

2.0

PhyloP100

1.5

PrimateAI

Uncertain

0.61

PROVEAN

Benign

-1.5

REVEL

Benign

0.14

Sift

Benign

0.38

Sift4G

Benign

0.49

Polyphen

0.69

Vest4

0.28

MutPred

0.37

Gain of glycosylation at S948 (P = 0.0955);

MVP

0.63

MPC

0.32

ClinPred

0.57

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.26

gMVP

0.43

Mutation Taster

=90/10

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over