chr7-107893264-AC-A

Variant names:

• chr7-107893264-AC-A
• rs1554396895
• NM_000108.5:c.105delC

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_000108.5(DLD):​c.105delC​(p.Tyr35fs) 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 (★★). Synonymous variant affecting the same amino acid position (i.e. Y35Y) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: DLD NM_000108.5 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: -0.706
• Publications: 0 publications found

Genes affected

DLD (HGNC:2898): (dihydrolipoamide dehydrogenase) This gene encodes a member of the class-I pyridine nucleotide-disulfide oxidoreductase family. The encoded protein has been identified as a moonlighting protein based on its ability to perform mechanistically distinct functions. In homodimeric form, the encoded protein functions as a dehydrogenase and is found in several multi-enzyme complexes that regulate energy metabolism. However, as a monomer, this protein can function as a protease. Mutations in this gene have been identified in patients with E3-deficient maple syrup urine disease and lipoamide dehydrogenase deficiency. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2014]

DLD Gene-Disease associations (from GenCC):

• Leigh syndrome

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• pyruvate dehydrogenase E3 deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Genomics England PanelApp, Ambry Genetics, Myriad Women's Health, ClinGen, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Pathogenic. The variant received 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 7-107893264-AC-A is Pathogenic according to our data. Variant chr7-107893264-AC-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 553084.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000108.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DLD	NM_000108.5	MANE Select	c.105delC	p.Tyr35fs	frameshift	Exon 2 of 14	NP_000099.2	A0A024R713
	DLD	NM_001289751.1		c.105delC	p.Tyr35fs	frameshift	Exon 2 of 13	NP_001276680.1	P09622
	DLD	NM_001289752.1		c.105delC	p.Tyr35fs	frameshift	Exon 2 of 13	NP_001276681.1	P09622-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DLD	ENST00000205402.10	TSL:1 MANE Select	c.105delC	p.Tyr35fs	frameshift	Exon 2 of 14	ENSP00000205402.3	P09622-1
	DLD	ENST00000451081.5	TSL:1	n.105delC		non_coding_transcript_exon	Exon 2 of 9	ENSP00000388077.1	F2Z2E3
	DLD	ENST00000880448.1		c.105delC	p.Tyr35fs	frameshift	Exon 2 of 14	ENSP00000550507.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
3	-	-	Pyruvate dehydrogenase E3 deficiency (3)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.71
Mutation Taster		=1/199	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs1554396895;

hg19: chr7-107533709;