NM_000284.4:c.1159_1160delAA

Variant names:

• chrX-19359638-TAA-T
• rs606231186
• NM_000284.4:c.1159_1160delAA

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_000284.4(PDHA1):​c.1159_1160delAA​(p.Lys387ValfsTer44) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars). The gene PDHA1 is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: not found (cov: 22)
• Consequence: PDHA1 NM_000284.4 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 8.95
• Publications: 0 publications found

Genes affected

PDHA1 (HGNC:8806): (pyruvate dehydrogenase E1 subunit alpha 1) The pyruvate dehydrogenase (PDH) complex is a nuclear-encoded mitochondrial multienzyme complex that catalyzes the overall conversion of pyruvate to acetyl-CoA and CO(2), and provides the primary link between glycolysis and the tricarboxylic acid (TCA) cycle. The PDH complex is composed of multiple copies of three enzymatic components: pyruvate dehydrogenase (E1), dihydrolipoamide acetyltransferase (E2) and lipoamide dehydrogenase (E3). The E1 enzyme is a heterotetramer of two alpha and two beta subunits. This gene encodes the E1 alpha 1 subunit containing the E1 active site, and plays a key role in the function of the PDH complex. Mutations in this gene are associated with pyruvate dehydrogenase E1-alpha deficiency and X-linked Leigh syndrome. Alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Mar 2010]

PDHA1 Gene-Disease associations (from GenCC):

• pyruvate dehydrogenase E1-alpha deficiency

  Inheritance: AR, XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, G2P, Orphanet, Labcorp Genetics (formerly Invitae)
• Leigh syndrome

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• Leigh syndrome with leukodystrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Specifications for PDHA1 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 13 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-19359638-TAA-T is Pathogenic according to our data. Variant chrX-19359638-TAA-T is described in ClinVar as Pathogenic. ClinVar VariationId is 10875.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000284.4. 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
	PDHA1	NM_000284.4	MANE Select	c.1159_1160delAA	p.Lys387ValfsTer44	frameshift	Exon 11 of 11	NP_000275.1	P08559-1
	PDHA1	NM_001173454.2		c.1273_1274delAA	p.Lys425ValfsTer44	frameshift	Exon 12 of 12	NP_001166925.1	P08559-4
	PDHA1	NM_001173455.2		c.1180_1181delAA	p.Lys394ValfsTer44	frameshift	Exon 11 of 11	NP_001166926.1	P08559-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PDHA1	ENST00000422285.7	TSL:1 MANE Select	c.1159_1160delAA	p.Lys387ValfsTer44	frameshift	Exon 11 of 11	ENSP00000394382.2	P08559-1
	PDHA1	ENST00000947567.1		c.1357_1358delAA	p.Lys453ValfsTer44	frameshift	Exon 13 of 13	ENSP00000617626.1
	PDHA1	ENST00000947577.1		c.1318_1319delAA	p.Lys440ValfsTer44	frameshift	Exon 12 of 12	ENSP00000617636.1

Frequencies

GnomAD3 genomes Cov.: 22

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 22

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
2	-	-	Pyruvate dehydrogenase E1-alpha deficiency (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		8.9
Mutation Taster		=0/200	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs606231186; hg19: chrX-19377756;