rs786204691

chr12-120738335-AAG-A

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_000017.4(ACADS):c.682_683del(p.Glu228ArgfsTer16) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000315 in 1,461,868 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.000031 (0 hom.)
• Consequence: ACADS NM_000017.4 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: 9.61

Genes affected

ACADS (HGNC:90): (acyl-CoA dehydrogenase short chain) This gene encodes a tetrameric mitochondrial flavoprotein, which is a member of the acyl-CoA dehydrogenase family. This enzyme catalyzes the initial step of the mitochondrial fatty acid beta-oxidation pathway. Mutations in this gene have been associated with short-chain acyl-CoA dehydrogenase (SCAD) deficiency. Alternative splicing results in two variants which encode different isoforms. [provided by RefSeq, Oct 2014]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 12-120738335-AAG-A is Pathogenic according to our data. Variant chr12-120738335-AAG-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 189093.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ACADS	NM_000017.4	c.682_683del	p.Glu228ArgfsTer16	frameshift_variant	6/10	ENST00000242592.9
ACADS	NM_001302554.2	c.670_671del	p.Glu224ArgfsTer16	frameshift_variant	6/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACADS	ENST00000242592.9	c.682_683del	p.Glu228ArgfsTer16	frameshift_variant	6/10	1	NM_000017.4	P1
ACADS	ENST00000411593.2	c.670_671del	p.Glu224ArgfsTer16	frameshift_variant	6/10	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.0000315 AC: 46 AN: 1461868 Hom.: 0 AF XY: 0.0000344 AC XY: 25 AN XY: 727236

Gnomad4 AFR exome AF: 0.00

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: 0.0000351

Gnomad4 OTH exome AF: 0.000116

GnomAD4 genome Cov.: 33

Bravo AF: 0.0000113

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Deficiency of butyryl-CoA dehydrogenase Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Nov 07, 2021	- -
Likely pathogenic, criteria provided, single submitter	literature only	Counsyl	Dec 16, 2014	- -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Jan 30, 2023	This sequence change creates a premature translational stop signal (p.Glu228Argfs*16) in the ACADS gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in ACADS are known to be pathogenic (PMID: 12736383, 18523805). ClinVar contains an entry for this variant (Variation ID: 189093). This premature translational stop signal has been observed in individual(s) with clinical features of ACADS-related conditions (PMID: 22241096). This variant is not present in population databases (gnomAD no frequency). For these reasons, this variant has been classified as Pathogenic. -

ACADS-related condition Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 20, 2023

The ACADS c.682_683delGA variant is predicted to result in a frameshift and premature protein termination (p.Glu228Argfs*16). This variant was reported along with another potentially causative variant in an individual with short-chain acyl-CoA-dehydrogenase deficiency (Pena. 2012. PubMed ID: 22241096). This variant has not been reported in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare. Frameshift variants in ACADS are expected to be pathogenic. This variant is interpreted as likely pathogenic. -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Apr 29, 2014

The c.682_683delGA mutation in the ACADS gene has been reported previously in association with short chain acyl-CoA dehydrogenase deficiency (Pena et al., 2012). The deletion causes a frameshift starting with codon Glutamic Acid 228, changes this amino acid to an Arginine residue and creates a premature Stop codon at position 16 of the new reading frame, denoted p.Glu228ArgfsX16. This mutation is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. The surrounding sequence GAAA{delGA}AGAC. The variant is found in ACADS panel(s). -

Computational scores

Source: dbNSFP v4.3

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

Other links and lift over

dbSNP: rs786204691; hg19: chr12-121176138;