rs875989875

Positions:

• chr1-75728472-A-ATTAGGAT

Variant summary

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

The NM_000016.6(ACADM):​c.107_113dup​(p.Ser38ArgfsTer3) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ACADM NM_000016.6 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 0.0520

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]

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 1-75728472-A-ATTAGGAT is Pathogenic according to our data. Variant chr1-75728472-A-ATTAGGAT is described in ClinVar as [Likely_pathogenic]. Clinvar id is 226104.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	c.107_113dup	p.Ser38ArgfsTer3	frameshift_variant	2/12	ENST00000370841.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACADM	ENST00000370841.9	c.107_113dup	p.Ser38ArgfsTer3	frameshift_variant	2/12	1	NM_000016.6	P4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Medium-chain acyl-coenzyme A dehydrogenase deficiency Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Aug 25, 2020	For these reasons, this variant has been classified as Pathogenic. Loss-of-function variants in ACADM are known to be pathogenic (PMID: 16121256, 20434380). This variant has not been reported in the literature in individuals with ACADM-related conditions. ClinVar contains an entry for this variant (Variation ID: 226104). This variant is not present in population databases (ExAC no frequency). This sequence change creates a premature translational stop signal (p.Ser38Argfs*3) in the ACADM gene. It is expected to result in an absent or disrupted protein product. -
Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Jun 01, 2016	- -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs875989875; hg19: chr1-76194157;