chr6-31779215-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2PP2BP4_Strong

The NM_006295.3(VARS1):c.3478G>A(p.Ala1160Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000687 in 1,454,806 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000069 ( 0 hom. )

Consequence

VARS1
NM_006295.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.118

Variant links:

Genes affected

VARS1 (HGNC:12651): (valyl-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. The protein encoded by this gene belongs to class-I aminoacyl-tRNA synthetase family and is located in the class III region of the major histocompatibility complex. [provided by RefSeq, Jul 2008]

VARS1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the VARS1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 14 curated pathogenic missense variants (we use a threshold of 10). The gene has 12 curated benign missense variants. Gene score misZ: 2.6849 (below the threshold of 3.09). Trascript score misZ: 3.4812 (above the threshold of 3.09). GenCC associations: The gene is linked to combined oxidative phosphorylation defect type 20, neurodevelopmental disorder with microcephaly, seizures, and cortical atrophy.

BP4

Computational evidence support a benign effect (MetaRNN=0.055498183).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
VARS1	NM_006295.3 link	c.3478G>A	p.Ala1160Thr	missense_variant	Exon 29 of 30	ENST00000375663.8	NP_006286.1	P26640-1A0A024RCN6
VARS1	XM_005249362.3 link	c.3481G>A	p.Ala1161Thr	missense_variant	Exon 29 of 30		XP_005249419.1
VARS1	XM_047419296.1 link	c.3481G>A	p.Ala1161Thr	missense_variant	Exon 28 of 29		XP_047275252.1
VARS1	XM_047419297.1 link	c.3478G>A	p.Ala1160Thr	missense_variant	Exon 28 of 29		XP_047275253.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
VARS1	ENST00000375663.8 link	c.3478G>A	p.Ala1160Thr	missense_variant	Exon 29 of 30	1	NM_006295.3	ENSP00000364815.3		P26640-1
VARS1	ENST00000463184.1 link	n.*15G>A		downstream_gene_variant		2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000878

AC:

AN:

227668

Hom.:

AF XY:

0.00000794

AC XY:

AN XY:

125950

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000594

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000687

AC:

AN:

1454806

Hom.:

Cov.:

AF XY:

0.00000553

AC XY:

AN XY:

723816

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000451

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:

0.00000630

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jan 15, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.3478G>A (p.A1160T) alteration is located in exon 29 (coding exon 28) of the VARS gene. This alteration results from a G to A substitution at nucleotide position 3478, causing the alanine (A) at amino acid position 1160 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.76

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Benign

0.0035

Eigen

Benign

-0.61

Eigen_PC

Benign

-0.49

FATHMM_MKL

Benign

0.76

M_CAP

Benign

0.016

MetaRNN

Benign

0.055

MetaSVM

Benign

-0.98

MutationAssessor

Benign

0.34

PrimateAI

Uncertain

0.70

PROVEAN

Benign

-0.59

REVEL

Benign

0.071

Sift

Benign

0.27

Sift4G

Benign

0.66

Polyphen

0.0020

Vest4

0.072

MutPred

0.43

Gain of sheet (P = 0.0344);

MVP

0.16

MPC

0.44

ClinPred

0.049

GERP RS

2.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.033

gMVP

0.28

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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