5-140674279-C-A

Position:

• chr5-140674279-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_002109.6(HARS1):​c.1508G>T​(p.Gly503Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: HARS1 NM_002109.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.199

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.106894225).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HARS1	NM_002109.6	c.1508G>T	p.Gly503Val	missense_variant	13/13	ENST00000504156.7	NP_002100.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HARS1	ENST00000504156.7	c.1508G>T	p.Gly503Val	missense_variant	13/13	1	NM_002109.6	ENSP00000425634	P3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Usher syndrome type 3B Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 14, 2021

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with HARS-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces glycine with valine at codon 503 of the HARS protein (p.Gly503Val). The glycine residue is weakly conserved and there is a moderate physicochemical difference between glycine and valine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	17
DANN	Benign	0.92
DEOGEN2	Benign	0.022	.;T;T;T;T;.;.;T
Eigen	Benign	-0.59
Eigen_PC	Benign	-0.53
FATHMM_MKL	Benign	0.71	D
LIST_S2	Uncertain	0.86	D;D;.;D;D;D;D;D
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.11	T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.2	.;.;L;L;.;.;.;.
MutationTaster	Benign	1.0	N;N;N;N;N;N;N;N
PrimateAI	Benign	0.25	T
PROVEAN	Benign	-1.3	N;N;.;N;N;N;N;N
REVEL	Benign	0.033
Sift	Benign	0.19	T;T;.;T;T;T;T;T
Sift4G	Benign	0.36	T;T;.;T;T;T;T;T
Polyphen		0.72, 0.079, 0.65	.;P;B;B;.;.;.;P
Vest4		0.13
MutPred		0.20		.;.;Loss of ubiquitination at K499 (P = 0.0447);Loss of ubiquitination at K499 (P = 0.0447);.;.;.;.;
MVP		0.49
MPC		0.54
ClinPred		0.46	T
GERP RS		0.50
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.4
Varity_R		0.057
gMVP		0.55

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr5-140053864;