rs200574045

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_005548.3(KARS1):c.1350G>C(p.Glu450Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000155 in 1,607,840 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

KARS1
NM_005548.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: -0.0860

Variant links:

Genes affected

KARS1 (HGNC:6215): (lysyl-tRNA synthetase 1) Aminoacyl-tRNA synthetases are a class of enzymes that charge tRNAs with their cognate amino acids. Lysyl-tRNA synthetase is a homodimer localized to the cytoplasm which belongs to the class II family of tRNA synthetases. It has been shown to be a target of autoantibodies in the human autoimmune diseases, polymyositis or dermatomyositis. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

KARS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.16163331).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
KARS1	NM_005548.3 linkuse as main transcript	c.1350G>C	p.Glu450Asp	missense_variant	11/14	ENST00000302445.8	NP_005539.1
KARS1	NM_001130089.2 linkuse as main transcript	c.1434G>C	p.Glu478Asp	missense_variant	12/15		NP_001123561.1
KARS1	NM_001378148.1 linkuse as main transcript	c.882G>C	p.Glu294Asp	missense_variant	11/14		NP_001365077.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KARS1	ENST00000302445.8 linkuse as main transcript	c.1350G>C	p.Glu450Asp	missense_variant	11/14	1	NM_005548.3	ENSP00000303043	A1	Q15046-1
KARS1	ENST00000319410.9 linkuse as main transcript	c.1434G>C	p.Glu478Asp	missense_variant	12/15	1		ENSP00000325448	P4	Q15046-2
KARS1	ENST00000568378.5 linkuse as main transcript	c.147-2508G>C		intron_variant		5		ENSP00000454512
KARS1	ENST00000564578.5 linkuse as main transcript	c.*893G>C		3_prime_UTR_variant, NMD_transcript_variant	11/14	5		ENSP00000455818

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152162

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

250912

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135674

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000137

AC:

AN:

1455678

Hom.:

Cov.:

AF XY:

0.00000690

AC XY:

AN XY:

724698

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR 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:

0.0000181

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152162

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000901

Hom.:

Bravo

AF:

0.0000264

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Sep 01, 2016

Variant classified as Uncertain Significance - Favor Benign. The p.Glu478Asp var iant in KARS has not been previously reported in individuals with hearing loss, but has been identified in 1/66554 European chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs200574045). Although this variant has been seen in the general population, its frequency is not high enough to rule out a pathogenic role. The glutamic acid (Glu) at position 478 is not conserved through species, with 2 mammals and >10 fish having an aspartic a cid (Asp) at this position, suggesting that this change may be tolerated. Addit ional computational prediction tools suggest that the p.Glu478Asp variant may no t impact the protein. In summary, while the clinical significance of the p.Glu47 8Asp variant is uncertain, the lack of conservation suggests that it is more lik ely to be benign. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 22, 2021

Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The aspartic acid amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. ClinVar contains an entry for this variant (Variation ID: 320632). This variant has not been reported in the literature in individuals affected with KARS-related conditions. This variant is present in population databases (rs200574045, gnomAD 0.004%). This sequence change replaces glutamic acid, which is acidic and polar, with aspartic acid, which is acidic and polar, at codon 478 of the KARS protein (p.Glu478Asp). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Benign

-0.31

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.55

.;D

Eigen

Benign

-0.45

Eigen_PC

Benign

-0.32

FATHMM_MKL

Uncertain

0.84

LIST_S2

Benign

0.86

D;D

M_CAP

Benign

0.019

MetaRNN

Benign

0.16

T;T

MetaSVM

Benign

-0.66

MutationAssessor

Benign

1.6

.;L

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.75

PROVEAN

Benign

-1.5

N;N

REVEL

Benign

0.26

Sift

Benign

0.11

T;T

Sift4G

Benign

0.15

T;T

Polyphen

0.0

B;B

Vest4

0.18

MutPred

0.51

.;Loss of ubiquitination at K446 (P = 0.141);

MVP

0.78

MPC

0.084

ClinPred

0.25

GERP RS

2.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.22

gMVP

0.57

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over