rs138834083

Positions:

chr17-7223816-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP5

The NM_000018.4(ACADVL):c.1273G>A(p.Ala425Thr) variant causes a missense change. The variant allele was found at a frequency of 0.000018 in 1,614,022 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

ACADVL
NM_000018.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:5U:4

Conservation

PhyloP100: 6.58

Variant links:

Genes affected

ACADVL (HGNC:92): (acyl-CoA dehydrogenase very long chain) The protein encoded by this gene is targeted to the inner mitochondrial membrane where it catalyzes the first step of the mitochondrial fatty acid beta-oxidation pathway. This acyl-Coenzyme A dehydrogenase is specific to long-chain and very-long-chain fatty acids. A deficiency in this gene product reduces myocardial fatty acid beta-oxidation and is associated with cardiomyopathy. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

ACADVL links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 17-7223816-G-A is Pathogenic according to our data. Variant chr17-7223816-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 92273.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=3, Uncertain_significance=4, Pathogenic=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ACADVL	NM_000018.4 linkuse as main transcript	c.1273G>A	p.Ala425Thr	missense_variant	13/20	ENST00000356839.10	NP_000009.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ACADVL	ENST00000356839.10 linkuse as main transcript	c.1273G>A	p.Ala425Thr	missense_variant	13/20	1	NM_000018.4	ENSP00000349297	P1	P49748-1

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000314

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

251466

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135906

show subpopulations

Gnomad AFR exome

AF:

0.000492

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000109

AC:

AN:

1461854

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727228

show subpopulations

Gnomad4 AFR exome

AF:

0.000388

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152168

Hom.:

Cov.:

AF XY:

0.0000941

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.000314

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:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000850

Hom.:

Bravo

AF:

0.0000945

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:5Uncertain:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Very long chain acyl-CoA dehydrogenase deficiency

Pathogenic:3Uncertain:2

Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 30, 2024	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 25, 2024	This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 425 of the ACADVL protein (p.Ala425Thr). This variant is present in population databases (rs138834083, gnomAD 0.07%). This missense change has been observed in individuals with very long chain acyl-CoA dehydrogenase deficiency (PMID: 23700290, 27209629; Invitae). ClinVar contains an entry for this variant (Variation ID: 92273). 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 expected to disrupt ACADVL protein function with a positive predictive value of 95%. For these reasons, this variant has been classified as Pathogenic. -
Uncertain significance, criteria provided, single submitter	clinical testing	Wong Mito Lab, Molecular and Human Genetics, Baylor College of Medicine	Nov 01, 2019	The NM_000018.3:c.1273G>A (NP_000009.1:p.Ala425Thr) [GRCH38: NC_000017.11:g.7223816G>A] variant in ACADVL gene is interpretated to be Uncertain Significance based on ACMG guidelines (PMID: 25741868). This variant has been reported. This variant meets the following evidence codes reported in the ACMG guidelines: PP3 -
Likely pathogenic, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Feb 01, 2022	The ACADVL c.1273G>A; p.Ala425Thr variant (rs138834083) is reported in the literature in the heterozygous or compound heterozygous state with a second pathogenic variant in multiple individuals affected with very long chain acyl-coA dehydrogenase (VLCAD) deficiency (Chien 2013, Miller 2015, Pena 2016). This variant is reported in ClinVar (Variation ID: 92273), and is found in the African population with an allele frequency of 0.064% (16/24,966 alleles) in the Genome Aggregation Database. The alanine at codon 425 is highly conserved and computational analyses predict that this variant is deleterious (REVEL: 0.722). Based on available information, this variant is considered to be likely pathogenic. References: Chien YH et al. Fatty Acid oxidation disorders in a chinese population in taiwan. JIMD Rep. 2013;11:165-72. PMID: 23700290. Miller MJ et al. Recurrent ACADVL molecular findings in individuals with a positive newborn screen for very long chain acyl-coA dehydrogenase (VLCAD) deficiency in the United States. Mol Genet Metab. 2015 Nov;116(3):139-45. PMID: 26385305. Pena LD et al. Outcomes and genotype-phenotype correlations in 52 individuals with VLCAD deficiency diagnosed by NBS and enrolled in the IBEM-IS database. Mol Genet Metab. 2016 Aug;118(4):272-81. PMID: 27209629. -
Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Jun 19, 2017	- -

not provided

Pathogenic:2Uncertain:1

Likely pathogenic, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Aug 24, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Mar 21, 2024	Identified in multiple individuals with a positive newborn screening result for VLCAD deficiency in whom a second variant in the ACADVL gene was not identified (PMID: 26385305); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 23700290, 26385305, 20480395, 27209629) -
Likely pathogenic, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Dec 07, 2021	PP1, PP4_moderate, PM2, PS4_moderate -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jan 25, 2023

Variant summary: ACADVL c.1273G>A (p.Ala425Thr) results in a non-conservative amino acid change located in the Acyl-CoA dehydrogenase/oxidase C-terminal domain (IPR009075) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 3.2e-05 in 251466 control chromosomes. c.1273G>A has been reported in the literature as a compound heterozygous genotype in at-least two individuals affected with Very Long Chain Acyl-CoA Dehydrogenase Deficiency (example, PMID: 23700290, 31794763, 26385305, 27209629). These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Seven clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. Multiple laboratories reported the variant with conflicting assessments (VUS, n=4; P/LP, n=4). Based on the evidence outlined above, the variant was classified as VUS-possibly pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Uncertain

0.073

BayesDel_noAF

Pathogenic

0.26

CADD

Pathogenic

DANN

Benign

0.94

DEOGEN2

Uncertain

0.72

.;D;.

Eigen

Uncertain

0.54

Eigen_PC

Uncertain

0.56

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.95

D;D;D

M_CAP

Pathogenic

0.57

MetaRNN

Uncertain

0.70

D;D;D

MetaSVM

Pathogenic

0.80

MutationAssessor

Benign

1.3

.;L;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.61

PROVEAN

Benign

-2.3

N;.;N

REVEL

Pathogenic

0.72

Sift

Benign

0.045

D;.;D

Sift4G

Benign

0.080

T;T;T

Polyphen

1.0, 0.92

.;D;P

Vest4

0.83

MVP

0.97

MPC

0.75

ClinPred

0.17

GERP RS

5.8

RBP_binding_hub_radar

1.1

RBP_regulation_power_radar

3.8

Varity_R

0.80

gMVP

0.88

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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