chrX-19359613-G-T

Variant names:

• chrX-19359613-G-T
• rs137853250
• NM_000284.4:c.1133G>T

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PM5 PP3_Moderate

The NM_000284.4(PDHA1):​c.1133G>T​(p.Arg378Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R378C) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 22)
• Consequence: PDHA1 NM_000284.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 9.60
• Publications: 8 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

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-19359612-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 214936.Status of the report is reviewed_by_expert_panel, 3 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.934

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.1133G>T	p.Arg378Leu	missense	Exon 11 of 11	NP_000275.1	P08559-1
	PDHA1	NM_001173454.2		c.1247G>T	p.Arg416Leu	missense	Exon 12 of 12	NP_001166925.1	P08559-4
	PDHA1	NM_001173455.2		c.1154G>T	p.Arg385Leu	missense	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.1133G>T	p.Arg378Leu	missense	Exon 11 of 11	ENSP00000394382.2	P08559-1
	PDHA1	ENST00000947567.1		c.1331G>T	p.Arg444Leu	missense	Exon 13 of 13	ENSP00000617626.1
	PDHA1	ENST00000947577.1		c.1292G>T	p.Arg431Leu	missense	Exon 12 of 12	ENSP00000617636.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 22

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)
1	-	-	Pyruvate dehydrogenase E1-alpha deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.47
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.75	D
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.68	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Uncertain	0.48	D
MutationAssessor	Pathogenic	3.6	H
PhyloP100		9.6
PrimateAI	Uncertain	0.61	T
PROVEAN	Pathogenic	-5.0	D
REVEL	Pathogenic	0.90
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.85
MutPred		0.73		Loss of MoRF binding (P = 0.0045)
MVP		0.93
MPC		0.17
ClinPred		1.0	D
GERP RS		5.6
Varity_R		0.97
gMVP		0.91
Mutation Taster		=2/98	disease causing

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: rs137853250; hg19: chrX-19377731;