17-7220828-G-C

Variant names:

• chr17-7220828-G-C
• rs557260142
• NM_000018.4:c.340G>C

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_000018.4(ACADVL):​c.340G>C​(p.Glu114Gln) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/24 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E114K) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ACADVL NM_000018.4 missense, splice_region
• Scores: Splicing: ADA: 0.00004094
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.16
• 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 3 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 16 uncertain in NM_000018.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.38847822).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000018.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ACADVL	NM_000018.4	MANE Select	c.340G>C	p.Glu114Gln	missense splice_region	Exon 5 of 20	NP_000009.1
	ACADVL	NM_001270447.2		c.409G>C	p.Glu137Gln	missense splice_region	Exon 6 of 21	NP_001257376.1
	ACADVL	NM_001033859.3		c.274G>C	p.Glu92Gln	missense splice_region	Exon 4 of 19	NP_001029031.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ACADVL	ENST00000356839.10	TSL:1 MANE Select	c.340G>C	p.Glu114Gln	missense splice_region	Exon 5 of 20	ENSP00000349297.5
	ACADVL	ENST00000350303.9	TSL:1	c.274G>C	p.Glu92Gln	missense splice_region	Exon 4 of 19	ENSP00000344152.5
	ACADVL	ENST00000543245.6	TSL:2	c.409G>C	p.Glu137Gln	missense splice_region	Exon 6 of 21	ENSP00000438689.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.074
BayesDel_addAF	Uncertain	0.076	D
BayesDel_noAF	Benign	-0.13
CADD	Benign	22
DANN	Benign	0.96
DEOGEN2	Uncertain	0.72	D
Eigen	Benign	-0.28
Eigen_PC	Benign	-0.20
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.87	D
M_CAP	Pathogenic	0.57	D
MetaRNN	Benign	0.39	T
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Benign	1.5	L
PhyloP100		1.2
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-1.6	N
REVEL	Uncertain	0.39
Sift	Benign	0.14	T
Sift4G	Benign	0.15	T
Polyphen		1.0	D
Vest4		0.43
MutPred		0.32		Loss of glycosylation at S110 (P = 0.1048)
MVP		0.96
MPC		0.21
ClinPred		0.19	T
GERP RS		2.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.24
gMVP		0.52

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000041
dbscSNV1_RF	Benign	0.032
SpliceAI score (max)		0.17		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: rs557260142; hg19: chr17-7124147;