chr19-12924794-G-A

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM2PP3_StrongPP5_Moderate

The NM_004461.3(FARSA):c.1040C>T(p.Pro347Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000128 in 1,606,256 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

FARSA
NM_004461.3 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 9.62

Variant links:

Genes affected

FARSA (HGNC:3592): (phenylalanyl-tRNA synthetase subunit alpha) Aminoacyl-tRNA synthetases are a class of enzymes that charge tRNAs with their cognate amino acids. This gene encodes a product which is similar to the catalytic subunit of prokaryotic and Saccharomyces cerevisiae phenylalanyl-tRNA synthetases (PheRS). This gene product has been shown to be expressed in a tumor-selective and cell cycle stage- and differentiation-dependent manner, the first member of the tRNA synthetase gene family shown to exhibit this type of regulated expression [provided by RefSeq, Jul 2008]

FARSA links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.946

PP5

Variant 19-12924794-G-A is Pathogenic according to our data. Variant chr19-12924794-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 3068592.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FARSA	NM_004461.3 link	c.1040C>T	p.Pro347Leu	missense_variant	Exon 10 of 13	ENST00000314606.9	NP_004452.1	Q9Y285-1Q6IBR2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FARSA	ENST00000314606.9 link	c.1040C>T	p.Pro347Leu	missense_variant	Exon 10 of 13	1	NM_004461.3	ENSP00000320309.3		Q9Y285-1

Frequencies

GnomAD3 genomes

AF:

0.000145

AC:

AN:

152246

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000265

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000810

AC:

AN:

246852

Hom.:

AF XY:

0.0000749

AC XY:

AN XY:

133508

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000164

Gnomad SAS exome

AF:

0.0000333

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000143

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000127

AC:

184

AN:

1453892

Hom.:

Cov.:

AF XY:

0.000120

AC XY:

AN XY:

722092

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000506

Gnomad4 SAS exome

AF:

0.0000233

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000160

Gnomad4 OTH exome

AF:

0.0000333

GnomAD4 genome

AF:

0.000144

AC:

AN:

152364

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74504

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.000265

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000154

Hom.:

Bravo

AF:

0.000125

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000577

AC:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Rajab interstitial lung disease with brain calcifications 2

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Molecular Genetics, Royal Melbourne Hospital

Dec 23, 2022

This sequence change in FARSA is predicted to replace proline with leucine at codon 347, p.(Pro347Leu). The proline residue is highly conserved (100 vertebrates, UCSC), and is a residue located at the heterodimer interface in the AA tRNA Ligase II domain (PMID: 35918773). There is a moderate physicochemical difference between proline and leucine. The highest population minor allele frequency in gnomAD v2.1 is 0.02% (21/126,978 alleles) in the European (non-Finnish) population, which is consistent with recessive disease. This variant has been detected in at least two probands compound heterozygous with a variant of uncertain significance (confirmed in trans) with a systemic disorder that included failure to thrive, hepatic dysfunction and progressive interstitial lung disease, and segregated in two affected family members from a single family (PMID: 35918773, https://n.neurology.org/content/98/18_Supplement/1171). An in vitro assay of heterotetramerisation showed the variant failed to form a heteromer with FARSB indicating that this variant impacts protein function (PMID: 35918773). Multiple lines of computational evidence predict a deleterious effect for the missense substitution (5/6 algorithms). Based on the classification scheme RMH Modified ACMG Guidelines v1.5.1, this variant is classified as LIKELY PATHOGENIC. Following criteria are met: PS3_Supporting, PM1_Supporting, PM2_Supporting, PM3_Supporting, PP1, PP3. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.64

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Pathogenic

0.21

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.25

T;.;D

Eigen

Pathogenic

0.75

Eigen_PC

Uncertain

0.58

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

0.99

D;D;D

M_CAP

Uncertain

0.24

MetaRNN

Pathogenic

0.95

D;D;D

MetaSVM

Pathogenic

0.87

MutationAssessor

Pathogenic

5.3

.;.;H

PrimateAI

Uncertain

0.72

PROVEAN

Pathogenic

-9.4

.;D;D

REVEL

Pathogenic

0.74

Sift

Pathogenic

0.0

.;D;D

Sift4G

Pathogenic

0.0010

D;D;D

Polyphen

1.0

.;.;D

Vest4

0.93

MVP

0.94

MPC

1.2

ClinPred

1.0

GERP RS

4.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.87

gMVP

0.83

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.090

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