Genetic Variant FARSB:c.-186T>A (chr2-222656259-A-T) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS1

The ENST00000938936.1(FARSB):c.-186T>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00061 in 578,376 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00051 ( 0 hom., cov: 36)

Exomes 𝑓: 0.00065 ( 0 hom. )

Consequence

FARSB
ENST00000938936.1 5_prime_UTR

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -2.77

Publications

5 publications found

Variant links:

Genes affected

FARSB (HGNC:17800): (phenylalanyl-tRNA synthetase subunit beta) This gene encodes a highly conserved enzyme that belongs to the aminoacyl-tRNA synthetase class IIc subfamily. This enzyme comprises the regulatory beta subunits that form a tetramer with two catalytic alpha subunits. In the presence of ATP, this tetramer is responsible for attaching L-phenylalanine to the terminal adenosine of the appropriate tRNA. A pseudogene located on chromosome 10 has been identified. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2015]

FARSB Gene-Disease associations (from GenCC):

Rajab interstitial lung disease with brain calcifications 1
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia

FARSB links:

ENSG00000303347 (HGNC:):

ENSG00000303347 links:

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ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000506 (77/152214) while in subpopulation NFE AF = 0.000882 (60/68028). AF 95% confidence interval is 0.000703. There are 0 homozygotes in GnomAd4. There are 27 alleles in the male GnomAd4 subpopulation. Median coverage is 36. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000938936.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FARSB	NM_005687.5	MANE Select	c.-186T>A		upstream_gene	N/A	NP_005678.3
	FARSB	NR_130154.2		n.-167T>A		upstream_gene	N/A

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
FARSB	ENST00000938936.1		c.-186T>A	5_prime_UTR	Exon 1 of 17	ENSP00000608995.1
FARSB	ENST00000281828.8	TSL:1 MANE Select	c.-186T>A	upstream_gene	N/A	ENSP00000281828.6
FARSB	ENST00000875114.1		c.-186T>A	upstream_gene	N/A	ENSP00000545173.1

Frequencies

GnomAD3 genomes

AF:

0.000506

AC:

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000289

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000882

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.000648

AC:

276

AN:

426162

Hom.:

Cov.:

AF XY:

0.000658

AC XY:

148

AN XY:

224814

show subpopulations

African (AFR)

AF:

0.000204

AC:

AN:

9808

American (AMR)

AF:

0.000435

AC:

AN:

13794

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

13610

East Asian (EAS)

AF:

0.000377

AC:

AN:

26520

South Asian (SAS)

AF:

0.0000471

AC:

AN:

42434

European-Finnish (FIN)

AF:

0.00

AC:

AN:

33566

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3304

European-Non Finnish (NFE)

AF:

0.000883

AC:

228

AN:

258234

Other (OTH)

AF:

0.00112

AC:

AN:

24892

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000506

AC:

AN:

152214

Hom.:

Cov.:

AF XY:

0.000363

AC XY:

AN XY:

74370

show subpopulations

African (AFR)

AF:

0.000289

AC:

AN:

41470

American (AMR)

AF:

0.000262

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000193

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000882

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000977

Hom.:

3538

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

0.0020

(source)

DANN

Benign

0.50

PhyloP100

-2.8

PromoterAI

0.075

Neutral

(source)

Mutation Taster

=300/0

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over