17-7225058-G-C

Position:

chr17-7225058-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1PM2BP4

The ENST00000356839.10(ACADVL):c.1929G>C(p.Glu643Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,614,008 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E643K) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

ACADVL
ENST00000356839.10 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:2

Conservation

PhyloP100: 2.57

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.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in ENST00000356839.10

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.35708368).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ACADVL	NM_000018.4 linkuse as main transcript	c.1929G>C	p.Glu643Asp	missense_variant	20/20	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.1929G>C	p.Glu643Asp	missense_variant	20/20	1	NM_000018.4	ENSP00000349297	P1	P49748-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461816

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727206

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152192

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74342

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, no assertion criteria provided

provider interpretation

Stanford Center for Inherited Cardiovascular Disease, Stanford University

Jan 24, 2018

p.Glu643Asp (c.1929G>C) in exon 20 of the ACADVL gene (NM_000018.3; ENST00000356839.9) Chromosome position: 17:7128377 G / C Based on the information reviewed below, including the lack of case reports, and the fact that this is a conservative amino acid change which is the default amino acid in multiple mammalian species, we classify it as a Variant of Uncertain Significance, Probably Benign, concluding that there is not sufficient evidence for its pathogenicity to warrant using it for predictive genetic testing. This variant is heterozygous in our patient. The ACADVL gene is associated with autosomal recessive very long chain acyl-CoA dehydrogenase (VLCAD) deficiency, and so any single variant is likely insufficient to cause disease. An affected individual would be expected to have a disease-causing variant in their other ACADVL allele as well. This variant has not previously been reported in a patient with disease, according to the Invitae report. This is a conservative amino acid change, resulting in the replacement of a negatively-charged Glutamic Acid with a negatively-charged Aspartic Acid. There are no Likely Pathogenic or Pathogenic variants listed in ClinVar within 10 amino acids to either side, indicating that this region of the protein might be tolerant of change. According to the Invitae report, the aspartic acid amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. 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". These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant is absent from the gnomAD database, which includes variant calls on ~140,000 individuals of European, African, Latino, South Asian, Ashkenazi, and East Asian descent. (Our patientâ€™s ancestry is African-American and Caucasian.) There is good coverage at this site. The phenotype of those individuals is not publicly available. The dataset is comprised of multiple cohorts, some of which were recruited from the general population, others were enriched for common cardiovascular disease. The curators made an effort to exclude individuals with severe pediatric diseases. -

Very long chain acyl-CoA dehydrogenase deficiency

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 19, 2022

This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glutamic acid, which is acidic and polar, with aspartic acid, which is acidic and polar, at codon 643 of the ACADVL protein (p.Glu643Asp). This variant has not been reported in the literature in individuals affected with ACADVL-related conditions. 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 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: 541715). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Pathogenic

0.22

BayesDel_noAF

Uncertain

0.080

CADD

Benign

DANN

Benign

0.92

DEOGEN2

Benign

0.25

.;T;.

Eigen

Benign

-0.14

Eigen_PC

Benign

-0.020

FATHMM_MKL

Uncertain

0.89

LIST_S2

Benign

0.81

T;T;T

M_CAP

Uncertain

0.24

MetaRNN

Benign

0.36

T;T;T

MetaSVM

Uncertain

0.50

MutationAssessor

Benign

1.5

.;L;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.50

PROVEAN

Benign

-1.7

N;.;N

REVEL

Uncertain

0.56

Sift

Benign

0.14

T;.;T

Sift4G

Benign

0.13

T;T;T

Polyphen

0.0010, 0.0

.;B;B

Vest4

0.30

MutPred

0.30

.;Gain of ubiquitination at K639 (P = 0.1165);.;

MVP

0.96

MPC

0.18

ClinPred

0.46

GERP RS

2.5

Varity_R

0.24

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