19-51345270-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001985.3(ETFB):c.709G>A(p.Val237Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000222 in 1,614,230 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00022 ( 0 hom. )

Consequence

ETFB
NM_001985.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: 0.111

Variant links:

Genes affected

ETFB (HGNC:3482): (electron transfer flavoprotein subunit beta) This gene encodes electron-transfer-flavoprotein, beta polypeptide, which shuttles electrons between primary flavoprotein dehydrogenases involved in mitochondrial fatty acid and amino acid catabolism and the membrane-bound electron transfer flavoprotein ubiquinone oxidoreductase. The gene deficiencies have been implicated in type II glutaricaciduria. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jul 2008]

ETFB links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.023987472).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
ETFB	NM_001985.3 linkuse as main transcript	c.709G>A	p.Val237Ile	missense_variant	6/6	ENST00000309244.9
ETFB	NM_001014763.1 linkuse as main transcript	c.982G>A	p.Val328Ile	missense_variant	5/5
ETFB	XM_024451418.2 linkuse as main transcript	c.598G>A	p.Val200Ile	missense_variant	6/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ETFB	ENST00000309244.9 linkuse as main transcript	c.709G>A	p.Val237Ile	missense_variant	6/6	1	NM_001985.3	P1	P38117-1
ETFB	ENST00000354232.8 linkuse as main transcript	c.982G>A	p.Val328Ile	missense_variant	5/5	1			P38117-2
	ENST00000600974.1 linkuse as main transcript	n.78+24C>T		intron_variant, non_coding_transcript_variant		3
ETFB	ENST00000596253.1 linkuse as main transcript			downstream_gene_variant		3

Frequencies

GnomAD3 genomes

AF:

0.000256

AC:

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000309

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000199

AC:

AN:

251458

Hom.:

AF XY:

0.000221

AC XY:

AN XY:

135906

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.000173

Gnomad ASJ exome

AF:

0.000198

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000308

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000219

AC:

320

AN:

1461886

Hom.:

Cov.:

AF XY:

0.000235

AC XY:

171

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.000239

Gnomad4 AMR exome

AF:

0.000313

Gnomad4 ASJ exome

AF:

0.000115

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000927

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000246

Gnomad4 OTH exome

AF:

0.000215

GnomAD4 genome

AF:

0.000256

AC:

AN:

152344

Hom.:

Cov.:

AF XY:

0.000295

AC XY:

AN XY:

74506

show subpopulations

Gnomad4 AFR

AF:

0.000144

Gnomad4 AMR

AF:

0.000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.000309

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000268

Hom.:

Bravo

AF:

0.000393

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000198

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000491

EpiControl

AF:

0.000474

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	May 19, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	May 08, 2018	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 30, 2024

The c.709G>A (p.V237I) alteration is located in exon 6 (coding exon 6) of the ETFB gene. This alteration results from a G to A substitution at nucleotide position 709, causing the valine (V) at amino acid position 237 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Multiple acyl-CoA dehydrogenase deficiency

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 25, 2022

This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 237 of the ETFB protein (p.Val237Ile). This variant is present in population databases (rs149129214, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with ETFB-related conditions. ClinVar contains an entry for this variant (Variation ID: 203700). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt ETFB protein function. 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

0.071

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.52

Cadd

Benign

7.1

Dann

Benign

0.94

Eigen

Benign

-0.84

Eigen_PC

Benign

-0.80

FATHMM_MKL

Benign

0.20

LIST_S2

Uncertain

0.90

D;D

M_CAP

Benign

0.041

MetaRNN

Benign

0.024

T;T

MetaSVM

Benign

-0.82

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.37

PROVEAN

Benign

-0.26

N;N

REVEL

Benign

0.17

Sift

Benign

0.41

T;T

Sift4G

Benign

0.42

T;T

Polyphen

0.0

B;B

Vest4

0.13

MVP

0.30

MPC

0.17

ClinPred

0.027

GERP RS

0.80

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.0

Varity_R

0.21

gMVP

0.27

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