rs371390356

Positions:

chr6-5404683-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_006567.5(FARS2):c.754G>A(p.Ala252Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000102 in 1,597,432 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

FARS2
NM_006567.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.776

Variant links:

Genes affected

FARS2 (HGNC:21062): (phenylalanyl-tRNA synthetase 2, mitochondrial) This gene encodes a protein that transfers phenylalanine to its cognate tRNA. This protein localizes to the mitochondrion and plays a role in mitochondrial protein translation. Mutations in this gene can cause combined oxidative phosphorylation deficiency 14 (Alpers encephalopathy). Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

FARS2 links:

FARS2 (HGNC:):

FARS2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03278613).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FARS2	NM_006567.5 linkuse as main transcript	c.754G>A	p.Ala252Thr	missense_variant	3/7	ENST00000274680.9	NP_006558.1	O95363

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
FARS2	ENST00000274680.9 linkuse as main transcript	c.754G>A	p.Ala252Thr	missense_variant	3/7	1	NM_006567.5	ENSP00000274680.4	O95363
FARS2	ENST00000324331.10 linkuse as main transcript	c.754G>A	p.Ala252Thr	missense_variant	3/7	1		ENSP00000316335.5	O95363
FARS2	ENST00000445533.1 linkuse as main transcript	c.142G>A	p.Ala48Thr	missense_variant	1/3	3		ENSP00000392525.1	Q5JRF7
FARS2	ENST00000648580.1 linkuse as main transcript	n.754G>A		non_coding_transcript_exon_variant	3/9			ENSP00000497889.1	A0A3B3ITR6

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

151982

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:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000163

AC:

AN:

245304

Hom.:

AF XY:

0.0000151

AC XY:

AN XY:

132584

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.0000356

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000109

AC:

157

AN:

1445450

Hom.:

Cov.:

AF XY:

0.000109

AC XY:

AN XY:

718380

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.000133

Gnomad4 OTH exome

AF:

0.000168

GnomAD4 genome

AF:

0.0000395

AC:

AN:

151982

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74228

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:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000141

Hom.:

Bravo

AF:

0.0000378

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Combined oxidative phosphorylation defect type 14

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 11, 2022

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 252 of the FARS2 protein (p.Ala252Thr). This variant is present in population databases (rs371390356, gnomAD 0.004%). This variant has not been reported in the literature in individuals affected with FARS2-related conditions. ClinVar contains an entry for this variant (Variation ID: 473316). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt FARS2 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.059

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.74

CADD

Benign

0.13

DANN

Benign

0.64

DEOGEN2

Benign

0.047

T;T;T

Eigen

Benign

-1.8

Eigen_PC

Benign

-1.7

FATHMM_MKL

Benign

0.0092

LIST_S2

Benign

0.43

.;T;T

M_CAP

Benign

0.0031

MetaRNN

Benign

0.033

T;T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

-0.26

N;N;.

PrimateAI

Benign

0.31

PROVEAN

Benign

0.030

N;N;N

REVEL

Benign

0.032

Sift

Benign

0.55

T;T;T

Sift4G

Benign

0.68

T;T;T

Polyphen

0.0

B;B;.

Vest4

0.12

MVP

0.35

MPC

0.15

ClinPred

0.012

GERP RS

0.18

Varity_R

0.041

gMVP

0.36

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