rs370983000

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_006567.5(FARS2):c.1069C>T(p.Leu357Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000208 in 1,611,726 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00022 ( 0 hom. )

Consequence

FARS2
NM_006567.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 2.30

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.13031596).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FARS2	NM_006567.5 linkuse as main transcript	c.1069C>T	p.Leu357Phe	missense_variant	6/7	ENST00000274680.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
FARS2	ENST00000274680.9 linkuse as main transcript	c.1069C>T	p.Leu357Phe	missense_variant	6/7	1	NM_006567.5	P1
FARS2	ENST00000324331.10 linkuse as main transcript	c.1069C>T	p.Leu357Phe	missense_variant	6/7	1		P1
FARS2	ENST00000648580.1 linkuse as main transcript	c.1069C>T	p.Leu357Phe	missense_variant, NMD_transcript_variant	6/9

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000841

AC:

AN:

249798

Hom.:

AF XY:

0.0000814

AC XY:

AN XY:

135144

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:

0.000176

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000222

AC:

324

AN:

1459552

Hom.:

Cov.:

AF XY:

0.000220

AC XY:

160

AN XY:

726206

show subpopulations

Gnomad4 AFR exome

AF:

0.0000599

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:

0.000281

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.0000723

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000213

Hom.:

Bravo

AF:

0.0000793

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000107

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Combined oxidative phosphorylation defect type 14

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 07, 2022

This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 357 of the FARS2 protein (p.Leu357Phe). This variant is present in population databases (rs370983000, gnomAD 0.02%). 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: 540537). 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. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 14, 2023

The c.1069C>T (p.L357F) alteration is located in exon 6 (coding exon 5) of the FARS2 gene. This alteration results from a C to T substitution at nucleotide position 1069, causing the leucine (L) at amino acid position 357 to be replaced by a phenylalanine (F). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

May 12, 2022

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 27535533) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.35

Cadd

Benign

Dann

Benign

0.71

DEOGEN2

Benign

0.034

T;T

Eigen

Benign

-0.56

Eigen_PC

Benign

-0.31

FATHMM_MKL

Uncertain

0.92

M_CAP

Benign

0.020

MetaRNN

Benign

0.13

T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

-0.72

N;N

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.45

PROVEAN

Benign

-1.2

N;N

REVEL

Benign

0.25

Sift

Benign

0.94

T;T

Sift4G

Benign

0.71

T;T

Polyphen

0.0020

B;B

Vest4

0.27

MVP

0.75

MPC

0.17

ClinPred

0.079

GERP RS

3.7

Varity_R

0.39

gMVP

0.56

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

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