rs387906297

Positions:

chr1-75761275-CAGTT-C

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_000016.6(ACADM):c.1102_1105del(p.Ala369LeufsTer18) variant causes a frameshift change. The variant allele was found at a frequency of 0.0000161 in 1,613,938 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. Q367Q) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000015 ( 0 hom. )

Consequence

ACADM
NM_000016.6 frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:11

Conservation

PhyloP100: 6.82

Variant links:

Genes affected

ACADM (HGNC:89): (acyl-CoA dehydrogenase medium chain) This gene encodes the medium-chain specific (C4 to C12 straight chain) acyl-Coenzyme A dehydrogenase. The homotetramer enzyme catalyzes the initial step of the mitochondrial fatty acid beta-oxidation pathway. Defects in this gene cause medium-chain acyl-CoA dehydrogenase deficiency, a disease characterized by hepatic dysfunction, fasting hypoglycemia, and encephalopathy, which can result in infantile death. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACADM links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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 1-75761275-CAGTT-C is Pathogenic according to our data. Variant chr1-75761275-CAGTT-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 3592.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ACADM	NM_000016.6 linkuse as main transcript	c.1102_1105del	p.Ala369LeufsTer18	frameshift_variant	11/12	ENST00000370841.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACADM	ENST00000370841.9 linkuse as main transcript	c.1102_1105del	p.Ala369LeufsTer18	frameshift_variant	11/12	1	NM_000016.6	P4	P11310-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251270

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135792

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000151

AC:

AN:

1461788

Hom.:

AF XY:

0.0000165

AC XY:

AN XY:

727200

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:

0.0000189

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152150

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74330

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.0000302

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:11

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Medium-chain acyl-coenzyme A dehydrogenase deficiency

Pathogenic:8

Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Nov 24, 2023	- -
Pathogenic, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Feb 20, 2015	- -
Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jun 04, 2021	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Mar 30, 2022	- -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Jan 12, 2024	This sequence change creates a premature translational stop signal (p.Ala369Leufs*18) in the ACADM gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 53 amino acid(s) of the ACADM protein. This variant is present in population databases (rs387906297, gnomAD 0.005%). This premature translational stop signal has been observed in individual(s) with medium-chain acyl-coenzyme A dehydrogenase deficiency (PMID: 1356169, 1729890, 20434380). It has also been observed to segregate with disease in related individuals. This variant is also known as c.1100_1103del. ClinVar contains an entry for this variant (Variation ID: 3592). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	May 02, 2017	- -
Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jan 27, 2021	Variant summary: ACADM c.1102_1105delTTAG (p.Ala369LeufsX18) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. Truncations downstream of this position have been classified as pathogenic by our laboratory. The variant allele was found at a frequency of 1.2e-05 in 251270 control chromosomes. c.1102_1105delTTAG has been reported in the literature in multiple individuals affected with Medium Chain Acyl-CoA Dehydrogenase Deficiency and characteristic biochemical profiles of elevated C8 (octanoylcarnitine) and HG (hexanoylglycine) levels in plasma and urine respectively (example, Ding_1992, Kelly_1992, Smith_2010). These data indicate that the variant is very likely to be associated with disease. Three clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. All laboratories classified the variant as pathogenic with some citing overlapping evidence utilized in the context of this evaluation. Based on the evidence outlined above, the variant was classified as pathogenic. -
Pathogenic, no assertion criteria provided	literature only	OMIM	Jan 01, 1992	- -

not provided

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Sep 24, 2020	Frameshift variant in the C-terminus predicted to result in protein truncation, as the last 53 amino acids are lost and replaced with 17 incorrect amino acids (Stenson et al., 2014); Not observed at a significant frequency in large population cohorts (Lek et al., 2016); This variant is associated with the following publications: (PMID: 20639189, 20434380, 1356169, 1729890) -
Pathogenic, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Nov 08, 2012	- -

ACADM-related disorder

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Nov 15, 2023

The ACADM c.1102_1105delTTAG variant is predicted to result in a frameshift and premature protein termination (p.Ala369Leufs*18). This variant, which has also been described as c.1100_1103del, has been reported with a second causative ACADM variant in individuals clinical and/or biochemical features consistent with medium chain acyl CoA dehydrogenase deficiency (MCADD) (Kelly et al. 1992. PubMed ID: 1356169; Smith et al. 2010. PubMed ID: 20434380). It has been reported to segregate with disease in at least one family (Ding et al. 1992. PubMed ID: 1729890). This variant is reported in 0.0047% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/1-76226960-CAGTT-C). Other nonsense and frameshift variants both up- and downstream in ACADM have been reported to be causative for MCADD (Human Gene Mutation Database, http://www.hgmd.cf.ac.uk/ac/index.php). In summary, this variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

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