6-5261307-C-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The ENST00000324331.10(FARS2):c.-73C>T variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0191 in 152,378 control chromosomes in the GnomAD database, including 89 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.019 (89 hom., cov: 34)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: FARS2 ENST00000324331.10 5_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -2.47

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]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BP6: Variant 6-5261307-C-T is Benign according to our data. Variant chr6-5261307-C-T is described in ClinVar as [Benign]. Clinvar id is 1329641.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0636 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FARS2	NM_001318872.2	c.-73C>T		5_prime_UTR_variant	1/7
FARS2	NM_001374878.1	c.-106C>T		5_prime_UTR_variant	1/7
FARS2	XM_047418087.1	c.-73C>T		5_prime_UTR_variant	1/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FARS2	ENST00000324331.10	c.-73C>T		5_prime_UTR_variant	1/7	1		P1
FARS2	ENST00000602691.1			upstream_gene_variant		3

Frequencies

GnomAD3 genomes AF: 0.0191 AC: 2910 AN: 152260 Hom.: 89 Cov.: 34

Gnomad AFR AF: 0.0657

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00837

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.000250

Gnomad OTH AF: 0.0172

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 532 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 420

Gnomad4 AFR 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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0191 AC: 2916 AN: 152378 Hom.: 89 Cov.: 34 AF XY: 0.0183 AC XY: 1365 AN XY: 74516

Gnomad4 AFR AF: 0.0657

Gnomad4 AMR AF: 0.00836

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000250

Gnomad4 OTH AF: 0.0170

Alfa AF: 0.0148 Hom.: 6

Bravo AF: 0.0222

Asia WGS AF: 0.00462 AC: 16 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Dec 21, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
Cadd	Benign	1.9
Dann	Benign	0.87

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

Other links and lift over

dbSNP: rs9784830; hg19: chr6-5261540;