Genetic Variant AARS1:p.Val685Gly (chr16-70258156-A-C) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_001605.3(AARS1):c.2054T>G(p.Val685Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,458,730 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V685M) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

AARS1
NM_001605.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 9.05

Publications

0 publications found

Variant links:

Genes affected

AARS1 (HGNC:20): (alanyl-tRNA synthetase 1) The human alanyl-tRNA synthetase (AARS) belongs to a family of tRNA synthases, of the class II enzymes. Class II tRNA synthases evolved early in evolution and are highly conserved. This is reflected by the fact that 498 of the 968-residue polypeptide human AARS shares 41% identity witht the E.coli protein. tRNA synthases are the enzymes that interpret the RNA code and attach specific aminoacids to the tRNAs that contain the cognate trinucleotide anticodons. They consist of a catalytic domain which interacts with the amino acid acceptor-T psi C helix of the tRNA, and a second domain which interacts with the rest of the tRNA structure. [provided by RefSeq, Jul 2008]

AARS1 Gene-Disease associations (from GenCC):

Charcot-Marie-Tooth disease axonal type 2N
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Orphanet
undetermined early-onset epileptic encephalopathy
Inheritance: AR, AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Illumina, Orphanet
developmental and epileptic encephalopathy, 29
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
trichothiodystrophy 8, nonphotosensitive
Inheritance: AR, Unknown Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

AARS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.845

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AARS1	NM_001605.3 link	c.2054T>G	p.Val685Gly	missense_variant	Exon 15 of 21	ENST00000261772.13	NP_001596.2	P49588-1
AARS1	XM_047433666.1 link	c.1992+824T>G		intron_variant	Intron 14 of 15		XP_047289622.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AARS1	ENST00000261772.13 link	c.2054T>G	p.Val685Gly	missense_variant	Exon 15 of 21	1	NM_001605.3	ENSP00000261772.8		P49588-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.86e-7

AC:

AN:

1458730

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725392

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33380

American (AMR)

AF:

0.00

AC:

AN:

44334

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26032

East Asian (EAS)

AF:

0.00

AC:

AN:

39550

South Asian (SAS)

AF:

0.00

AC:

AN:

85650

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53268

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5752

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1110498

Other (OTH)

AF:

0.00

AC:

AN:

60266

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

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

Pathogenic

0.94

BayesDel_addAF

Pathogenic

0.39

BayesDel_noAF

Pathogenic

0.32

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.75

Eigen

Pathogenic

1.0

Eigen_PC

Pathogenic

0.93

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

M_CAP

Pathogenic

0.33

MetaRNN

Pathogenic

0.85

MetaSVM

Uncertain

0.44

MutationAssessor

Pathogenic

3.4

PhyloP100

9.0

PrimateAI

Uncertain

0.70

PROVEAN

Pathogenic

-5.6

REVEL

Pathogenic

0.77

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

0.99

Vest4

0.62

MutPred

0.69

Loss of stability (P = 0.0027);

MVP

0.96

MPC

0.77

ClinPred

0.99

GERP RS

5.8

Varity_R

0.98

gMVP

0.73

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

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chr16-70258156-A-C

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over