rs1554107200

Positions:

• chr5-140679127-C-A

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PP3_Moderate PP5_Moderate

The NM_002109.6(HARS1):​c.397G>T​(p.Val133Phe) variant causes a missense, splice region 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. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: HARS1 NM_002109.6 missense, splice_region
• Scores: Splicing: ADA: 0.9999
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.57

Genes affected

HARS1 (HGNC:4816): (histidyl-tRNA synthetase 1) Aminoacyl-tRNA synthetases are a class of enzymes that charge tRNAs with their cognate amino acids. The protein encoded by this gene is a cytoplasmic enzyme which belongs to the class II family of aminoacyl-tRNA synthetases. The enzyme is responsible for the synthesis of histidyl-transfer RNA, which is essential for the incorporation of histidine into proteins. The gene is located in a head-to-head orientation with HARSL on chromosome five, where the homologous genes share a bidirectional promoter. The gene product is a frequent target of autoantibodies in the human autoimmune disease polymyositis/dermatomyositis. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]

HARS1 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM1: In a helix (size 9) in uniprot entity HARS1_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_002109.6
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.845
• PP5: Variant 5-140679127-C-A is Pathogenic according to our data. Variant chr5-140679127-C-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 548118.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HARS1	NM_002109.6	c.397G>T	p.Val133Phe	missense_variant, splice_region_variant	5/13	ENST00000504156.7	NP_002100.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HARS1	ENST00000504156.7	c.397G>T	p.Val133Phe	missense_variant, splice_region_variant	5/13	1	NM_002109.6	ENSP00000425634.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Autosomal dominant Charcot-Marie-Tooth disease type 2W Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Division of Genetic Medicine, Lausanne University Hospital

Jul 03, 2018

The c.397G>T (p.Val133Phe) variant in HARS has never been described in any public databases. It is predicted to be deleterious by various in-silico software as CADD, VEST3, MutationTaster, SIFT. It affects the 1st base of exon 5 and is predicted to lead to an incorrect exon splicing. This variant is surrounded by known pathogenic variants causing AD CMT (Safka Brozkova, 2015). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.21
CADD	Pathogenic	34
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.74	.;D;D;D;.;.
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	1.0	D;.;D;D;D;D
M_CAP	Uncertain	0.15	D
MetaRNN	Pathogenic	0.85	D;D;D;D;D;D
MetaSVM	Uncertain	0.32	D
MutationAssessor	Pathogenic	4.7	H;H;H;.;.;.
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-4.8	D;.;D;D;D;D
REVEL	Uncertain	0.62
Sift	Pathogenic	0.0	D;.;D;D;D;D
Sift4G	Pathogenic	0.0	D;.;D;D;D;D
Polyphen		1.0	.;D;D;.;.;.
Vest4		0.88
MutPred		0.70		Gain of sheet (P = 0.1208);Gain of sheet (P = 0.1208);Gain of sheet (P = 0.1208);.;.;.;
MVP		0.88
MPC		1.5
ClinPred		1.0	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.99
gMVP		0.97

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	1.0
SpliceAI score (max)		0.63		Details are displayed if max score is > 0.2
DS_AL_spliceai		0.63		Position offset: 0

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1554107200; hg19: chr5-140058712;