dbSNP rs754325237: ACADVL:p.Ile356del (chr17-7222849-GCAT-G) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PM4_SupportingPP5

The NM_000018.4(ACADVL):c.1065_1067delCAT(p.Ile356del) variant causes a disruptive inframe deletion change. The variant allele was found at a frequency of 0.0000167 in 1,612,320 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 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

ACADVL
NM_000018.4 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:3U:5

Conservation

PhyloP100: 4.10

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 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM4

Nonframeshift variant in NON repetitive region in NM_000018.4. Strenght limited to Supporting due to length of the change: 1aa.

PP5

Variant 17-7222849-GCAT-G is Pathogenic according to our data. Variant chr17-7222849-GCAT-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 555781.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=2, Uncertain_significance=5, Pathogenic=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ACADVL	NM_000018.4 link	c.1065_1067delCAT	p.Ile356del	disruptive_inframe_deletion	Exon 10 of 20	ENST00000356839.10	NP_000009.1	P49748-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ACADVL	ENST00000356839.10 link	c.1065_1067delCAT	p.Ile356del	disruptive_inframe_deletion	Exon 10 of 20	1	NM_000018.4	ENSP00000349297.5		P49748-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152112

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000576

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:

0.0000439

AC:

AN:

250762

Hom.:

AF XY:

0.0000443

AC XY:

AN XY:

135554

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000893

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000171

AC:

AN:

1460208

Hom.:

AF XY:

0.0000151

AC XY:

AN XY:

726438

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000880

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152112

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74324

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.000576

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:

0.0000227

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:3Uncertain:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Very long chain acyl-CoA dehydrogenase deficiency

Pathogenic:3Uncertain:3

Apr 02, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 11, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant, c.1065_1067del, results in the deletion of 1 amino acid(s) of the ACADVL protein (p.Ile356del), but otherwise preserves the integrity of the reading frame. This variant is present in population databases (rs754325237, gnomAD 0.09%). This variant has been observed in individual(s) with very long-chain acyl-CoA dehydrogenase deficiency (PMID: 28871440; internal data). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 555781). For these reasons, this variant has been classified as Pathogenic. -

Nov 01, 2019

Wong Mito Lab, Molecular and Human Genetics, Baylor College of Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The NM_000018.3:c.1065_1067delCAT (NP_000009.1:p.Ile356del) [GRCH38: NC_000017.11:g.7222853_7222855del] variant in ACADVL gene is interpretated to be Uncertain Significance based on ACMG guidelines (PMID: 25741868). This variant has been reported. This variant dose not meet any evidence codes reported in the ACMG guidelines. -

Dec 28, 2017

Counsyl

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 25, 2021

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The ACADVL c.1065_1067delCAT; p.Ile356del variant (rs754325237) is reported in the literature in multiple individuals affected with VLCAD deficiency (Gillingham 2017). This variant is reported in ClinVar (Variation ID: 555781) and is found in the Ashkenazi Jewish population with an allele frequency of 0.1% (10/10366 alleles) in the Genome Aggregation Database. This variant deletes a single isoleucine residue leaving the rest of the protein in-frame. However, given the lack of clinical and functional data, the significance of the p.Ile356del variant is uncertain at this time. References: Gillingham MB et al. Triheptanoin versus trioctanoin for long-chain fatty acid oxidation disorders: a double blinded, randomized controlled trial. J Inherit Metab Dis. 2017 Nov;40(6):831-843.PMID: 28871440. -

Feb 29, 2024

Baylor Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Uncertain:1

Oct 19, 2021

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

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: ACADVL c.1065_1067delCAT (p.Ile356del) results in an in-frame deletion that is predicted to remove isoleucine amino acid from the encoded protein. The variant allele was found at a frequency of 4.4e-05 in 250762 control chromosomes (gnomAD). This frequency is not higher than expected for a pathogenic variant in ACADVL causing Very Long Chain Acyl-CoA Dehydrogenase Deficiency (4.4e-05 vs 0.0029), allowing no conclusion about variant significance. c.1065_1067delCAT has been reported in the literature in compound heterozygous individuals affected with Very Long Chain Acyl-CoA Dehydrogenase Deficiency (Gillingham_2017, Elizondo_2020). 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. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 and classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as VUS-possibly pathogenic. -

not provided

Uncertain:1

Jun 19, 2019

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In-frame deletion of one amino acids in a non-repeat region; In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 28871440) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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