rs1032857886

Variant names:

• chr17-7221020-C-T
• rs1032857886
• NM_000018.4:c.439C>T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2_Supporting PM3_Supporting PP3 PP4

This summary comes from the ClinGen Evidence Repository: The c.439C>T (p.Pro147Ser) variant in ACADVL is a missense in exon 6. This variant has been reported once in the literature in a proband with very-long chain acyl-CoA dehydrogenase deficiency, and elevated C14:1 in NBS (PP4, PMID27209629). This variant is absent from population databases gnomAD v2.1.1 (PM2_supporting). The computational predictor REVEL gives a score of 0.88, which is above the threshold of 0.75, evidence that correlates with impact to ACADVL function (PP3). However, there is insufficient experimental or case data identified in the literature for this variant and is therefore classified as a VUS. (ACADVL-specific ACMG/AMP criteria applied: PP4; PM2_supporting; PP3). LINK:https://erepo.genome.network/evrepo/ui/classification/CA287435425/MONDO:0008723/021

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ACADVL NM_000018.4 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:5
• Conservation: PhyloP100: 5.22
• Publications: 3 publications found

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 Gene-Disease associations (from GenCC):

• very long chain acyl-CoA dehydrogenase deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, ClinGen, PanelApp Australia, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PM3: For more information check the summary or visit ClinGen Evidence Repository.
• PP3: For more information check the summary or visit ClinGen Evidence Repository.
• PP4: For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ACADVL	NM_000018.4	c.439C>T	p.Pro147Ser	missense_variant	Exon 6 of 20	ENST00000356839.10	NP_000009.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ACADVL	ENST00000356839.10	c.439C>T	p.Pro147Ser	missense_variant	Exon 6 of 20	1	NM_000018.4	ENSP00000349297.5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461738 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 727166

African (AFR) AF: 0.0000597 AC: 2 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53324

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5732

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111996

Other (OTH) AF: 0.00 AC: 0 AN: 60390

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: reviewed by expert panel

Submissions by phenotype

Very long chain acyl-CoA dehydrogenase deficiency Uncertain:4

Apr 04, 2018

Counsyl

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Sep 01, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces proline with serine at codon 147 of the ACADVL protein (p.Pro147Ser). The proline residue is highly conserved and there is a moderate physicochemical difference between proline and serine. This variant is not present in population databases (ExAC no frequency). This missense change has been observed in individual(s) with clinical features of very long chain acyl-CoA dehydrogenase deficiency (PMID: 27209629). ClinVar contains an entry for this variant (Variation ID: 557575). 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. 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. -

Sep 22, 2022

ClinGen ACADVL Variant Curation Expert Panel, ClinGen

Significance: Uncertain significance

Review Status: reviewed by expert panel

Collection Method: curation

The c.439C>T (p.Pro147Ser) variant in ACADVL is a missense in exon 6. This variant has been reported once in the literature in a proband with very-long chain acyl-CoA dehydrogenase deficiency, and elevated C14:1 in NBS (PP4, PMID27209629). This variant is absent from population databases gnomAD v2.1.1 (PM2_supporting). The computational predictor REVEL gives a score of 0.88, which is above the threshold of 0.75, evidence that correlates with impact to ACADVL function (PP3). However, there is insufficient experimental or case data identified in the literature for this variant and is therefore classified as a VUS. (ACADVL-specific ACMG/AMP criteria applied: PP4; PM2_supporting; PP3). -

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.439C>T (NP_000009.1:p.Pro147Ser) [GRCH38: NC_000017.11:g.7221020C>T] 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: PM1, PP3 -

not specified Uncertain:1

Mar 06, 2024

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.439C>T (p.Pro147Ser) results in a non-conservative amino acid change located in the Acyl-CoA dehydrogenase/oxidase, N-terminal domain (IPR013786) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 251368 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.439C>T has been reported in the literature in at-least one individual affected with Very Long Chain Acyl-CoA Dehydrogenase Deficiency (example: Pena_2016). These data do not allow any conclusion about variant significance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 27209629). ClinVar contains an entry for this variant (Variation ID: 557575). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.33
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.96	.;D;.;.;D
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.94	D;D;D;D;D
M_CAP	Pathogenic	0.90	D
MetaRNN	Pathogenic	0.97	D;D;D;D;D
MetaSVM	Pathogenic	0.94	D
MutationAssessor	Pathogenic	3.1	.;M;.;.;.
PhyloP100		5.2
PrimateAI	Uncertain	0.72	T
PROVEAN	Pathogenic	-8.0	D;.;.;D;.
REVEL	Pathogenic	0.88
Sift	Uncertain	0.0020	D;.;.;D;.
Sift4G	Uncertain	0.0050	D;D;D;D;D
Polyphen		1.0, 1.0	.;D;.;D;.
Vest4		0.86
MutPred		0.81		.;Gain of sheet (P = 0.0827);Gain of sheet (P = 0.0827);.;.;
MVP		0.98
MPC		0.77
ClinPred		1.0	D
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.85
gMVP		0.90
Mutation Taster		=0/100	disease causing

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

Other links and lift over

dbSNP: rs1032857886; hg19: chr17-7124339;