Genetic Variant PDHA1:p.Gly14Gly (chrX-19344079-C-T) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2BP4_StrongBP6_ModerateBP7

The NM_000284.4(PDHA1):c.42C>T(p.Gly14Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000415 in 1,205,247 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., 1 hem., cov: 25)

Exomes 𝑓: 0.0000018 ( 0 hom. 0 hem. )

Consequence

PDHA1
NM_000284.4 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.238

Publications

0 publications found

Variant links:

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

PDHA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.64).

BP6

Variant X-19344079-C-T is Benign according to our data. Variant chrX-19344079-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1610869.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=0.238 with no splicing effect.

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

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PDHA1	NM_000284.4	MANE Select	c.42C>T	p.Gly14Gly	synonymous	Exon 1 of 11	NP_000275.1	P08559-1
PDHA1	NM_001173454.2		c.42C>T	p.Gly14Gly	synonymous	Exon 1 of 12	NP_001166925.1	P08559-4
PDHA1	NM_001173455.2		c.42C>T	p.Gly14Gly	synonymous	Exon 1 of 11	NP_001166926.1	P08559-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PDHA1	ENST00000422285.7	TSL:1 MANE Select	c.42C>T	p.Gly14Gly	synonymous	Exon 1 of 11	ENSP00000394382.2	P08559-1
PDHA1	ENST00000947567.1		c.42C>T	p.Gly14Gly	synonymous	Exon 1 of 13	ENSP00000617626.1
PDHA1	ENST00000947577.1		c.42C>T	p.Gly14Gly	synonymous	Exon 1 of 12	ENSP00000617636.1

Frequencies

GnomAD3 genomes

AF:

0.0000266

AC:

AN:

112749

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000584

AC:

AN:

171208

AF XY:

0.0000164

show subpopulations

Gnomad AFR exome

AF:

0.0000833

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000183

AC:

AN:

1092498

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

359792

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0000380

AC:

AN:

26298

American (AMR)

AF:

0.00

AC:

AN:

35060

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19292

East Asian (EAS)

AF:

0.00

AC:

AN:

30139

South Asian (SAS)

AF:

0.00

AC:

AN:

53604

European-Finnish (FIN)

AF:

0.00

AC:

AN:

39306

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2965

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

840004

Other (OTH)

AF:

0.0000218

AC:

AN:

45830

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.00000000770867), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.400

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000266

AC:

AN:

112749

Hom.:

Cov.:

AF XY:

0.0000286

AC XY:

AN XY:

34907

show subpopulations

African (AFR)

AF:

0.0000965

AC:

AN:

31096

American (AMR)

AF:

0.00

AC:

AN:

10797

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2654

East Asian (EAS)

AF:

0.00

AC:

AN:

3558

South Asian (SAS)

AF:

0.00

AC:

AN:

2789

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6233

Middle Eastern (MID)

AF:

0.00

AC:

AN:

237

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

53189

Other (OTH)

AF:

0.00

AC:

AN:

1514

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000540

Hom.:

Bravo

AF:

0.0000227

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Pyruvate dehydrogenase E1-alpha deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.64

CADD

Benign

7.8

(source)

DANN

Benign

0.93

PhyloP100

0.24

PromoterAI

0.031

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Mutation Taster

=100/0

polymorphism

(source)

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over