rs1396171148

Variant names:

• chr2-222613892-T-G
• rs1396171148
• NM_005687.5:c.1381A>C

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Moderate PP5_Moderate

The NM_005687.5(FARSB):​c.1381A>C​(p.Thr461Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: FARSB NM_005687.5 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 7.53
• Publications: 1 publications found

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

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.906
• PP5: Variant 2-222613892-T-G is Pathogenic according to our data. Variant chr2-222613892-T-G is described in ClinVar as Pathogenic. ClinVar VariationId is 545642.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005687.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FARSB	NM_005687.5	MANE Select	c.1381A>C	p.Thr461Pro	missense	Exon 15 of 17	NP_005678.3
	FARSB	NR_130154.2		n.1596A>C		non_coding_transcript_exon	Exon 16 of 18

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FARSB	ENST00000281828.8	TSL:1 MANE Select	c.1381A>C	p.Thr461Pro	missense	Exon 15 of 17	ENSP00000281828.6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Rajab interstitial lung disease with brain calcifications (1)
1	-	-	Vascular dilatation;C0023890:Cirrhosis of liver;C0206061:Interstitial pneumonitis;C0270685:Cerebral calcification (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.51	D
Eigen	Pathogenic	0.97
Eigen_PC	Pathogenic	0.88
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.091	D
MetaRNN	Pathogenic	0.91	D
MetaSVM	Uncertain	0.58	D
MutationAssessor	Pathogenic	3.9	H
PhyloP100		7.5
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-5.8	D
REVEL	Pathogenic	0.93
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.80
MutPred		0.72		Loss of stability (P = 0.2406)
MVP		0.68
MPC		0.81
ClinPred		1.0	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.97
gMVP		0.92
Mutation Taster		=2/98	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs1396171148; hg19: chr2-223478611;