rs1057518756

Variant names:

• chrX-19349319-G-C
• rs1057518756
• NM_000284.4:c.65G>C
• PDHA1 p.Arg22Thr

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_000284.4(PDHA1):​c.65G>C​(p.Arg22Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★★). The gene PDHA1 is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: not found (cov: 24)
• Consequence: PDHA1 NM_000284.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 5.10
• Publications: 2 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):

• Leigh syndrome

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• pyruvate dehydrogenase E1-alpha deficiency

  Inheritance: XL, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics, Orphanet, G2P
• 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: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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.65G>C	p.Arg22Thr	missense	Exon 2 of 11	NP_000275.1	P08559-1
	PDHA1	NM_001173454.2		c.179G>C	p.Arg60Thr	missense	Exon 3 of 12	NP_001166925.1	P08559-4
	PDHA1	NM_001173455.2		c.65G>C	p.Arg22Thr	missense	Exon 2 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.65G>C	p.Arg22Thr	missense	Exon 2 of 11	ENSP00000394382.2	P08559-1
	PDHA1	ENST00000947567.1		c.263G>C	p.Arg88Thr	missense	Exon 4 of 13	ENSP00000617626.1
	PDHA1	ENST00000947577.1		c.179G>C	p.Arg60Thr	missense	Exon 3 of 12	ENSP00000617636.1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 25

GnomAD4 genome Cov.: 24

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	2	-	Pyruvate dehydrogenase E1-alpha deficiency (2)
-	1	-	Seizure;C0543888:Epileptic encephalopathy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
CADD	Uncertain	24
DANN	Benign	0.92
DEOGEN2	Benign	0.017	T
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.96	D
M_CAP	Pathogenic	0.82	D
MetaRNN	Uncertain	0.70	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.8	M
PhyloP100		5.1
PrimateAI	Uncertain	0.72	T
PROVEAN	Benign	-0.54	N
REVEL	Uncertain	0.54
Sift	Benign	0.17	T
Sift4G	Benign	0.54	T
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.27
gMVP		0.80
Mutation Taster		=33/67	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1057518756;

hg19: chrX-19367437;

COSMIC: COSV63328116;

COSMIC: COSV63328116;