rs140921822

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_006859.4(LIAS):c.57A>C(p.Arg19Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000609 in 1,574,312 control chromosomes in the GnomAD database, including 9 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R19T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0033 ( 2 hom., cov: 33)

Exomes 𝑓: 0.00032 ( 7 hom. )

Consequence

LIAS
NM_006859.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 0.590

Variant links:

Genes affected

LIAS (HGNC:16429): (lipoic acid synthetase) The protein encoded by this gene belongs to the biotin and lipoic acid synthetases family. Localized in the mitochondrion, this iron-sulfur enzyme catalyzes the final step in the de novo pathway for the biosynthesis of lipoic acid, a potent antioxidant. The deficient expression of this enzyme has been linked to conditions such as diabetes, atherosclerosis and neonatal-onset epilepsy. Alternative splicing occurs at this locus, and several transcript variants encoding distinct isoforms have been identified. [provided by RefSeq, Aug 2020]

LIAS links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0059530437).

BP6

Variant 4-39460801-A-C is Benign according to our data. Variant chr4-39460801-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 378084.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00334 (508/152256) while in subpopulation AFR AF= 0.0117 (487/41544). AF 95% confidence interval is 0.0109. There are 2 homozygotes in gnomad4. There are 247 alleles in male gnomad4 subpopulation. This position pass quality control queck.

BS2

High Homozygotes in GnomAd at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LIAS	NM_006859.4 linkuse as main transcript	c.57A>C	p.Arg19Ser	missense_variant	2/11	ENST00000640888.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LIAS	ENST00000640888.2 linkuse as main transcript	c.57A>C	p.Arg19Ser	missense_variant	2/11	1	NM_006859.4	P1	O43766-1

Frequencies

GnomAD3 genomes

AF:

0.00334

AC:

508

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0118

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000982

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:

0.0000294

Gnomad OTH

AF:

0.00192

GnomAD3 exomes

AF:

0.000808

AC:

179

AN:

221586

Hom.:

AF XY:

0.000532

AC XY:

AN XY:

120280

show subpopulations

Gnomad AFR exome

AF:

0.0108

Gnomad AMR exome

AF:

0.000119

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:

0.0000568

Gnomad OTH exome

AF:

0.000191

GnomAD4 exome

AF:

0.000317

AC:

451

AN:

1422056

Hom.:

Cov.:

AF XY:

0.000296

AC XY:

209

AN XY:

706012

show subpopulations

Gnomad4 AFR exome

AF:

0.0120

Gnomad4 AMR exome

AF:

0.000229

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000127

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000638

Gnomad4 OTH exome

AF:

0.000974

GnomAD4 genome

AF:

0.00334

AC:

508

AN:

152256

Hom.:

Cov.:

AF XY:

0.00332

AC XY:

247

AN XY:

74438

show subpopulations

Gnomad4 AFR

AF:

0.0117

Gnomad4 AMR

AF:

0.000980

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00190

Alfa

AF:

0.000500

Hom.:

Bravo

AF:

0.00374

ESP6500AA

AF:

0.0111

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000939

AC:

114

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Oct 24, 2017

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 14, 2023

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Lipoic acid synthetase deficiency

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 30, 2024

- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Athena Diagnostics

Sep 07, 2017

- -

LIAS-related disorder

Benign:1

Benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 28, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.52

BayesDel_noAF

Benign

-0.51

Cadd

Benign

9.5

Dann

Benign

0.88

DEOGEN2

Benign

0.26

T;T;T;.;T;.;.;.;.

Eigen

Benign

-0.71

Eigen_PC

Benign

-0.61

FATHMM_MKL

Benign

0.57

LIST_S2

Benign

0.84

T;T;T;T;T;T;T;T;T

MetaRNN

Benign

0.0060

T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.40

N;.;.;N;.;.;N;.;.

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.42

Polyphen

0.0

B;B;B;.;B;.;.;.;.

Vest4

0.32, 0.18, 0.33, 0.33

MutPred

0.44

Loss of MoRF binding (P = 0.0147);Loss of MoRF binding (P = 0.0147);Loss of MoRF binding (P = 0.0147);Loss of MoRF binding (P = 0.0147);Loss of MoRF binding (P = 0.0147);Loss of MoRF binding (P = 0.0147);Loss of MoRF binding (P = 0.0147);Loss of MoRF binding (P = 0.0147);Loss of MoRF binding (P = 0.0147);

MVP

0.68

MPC

0.43

ClinPred

0.0079

GERP RS

0.86

Varity_R

0.074

gMVP

0.58

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