X-24494784-G-A

Position:

chrX-24494784-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP3_Moderate

The NM_005391.5(PDK3):c.149G>A(p.Arg50Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000502 in 1,195,905 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 24)

Exomes 𝑓: 0.0000046 ( 0 hom. 1 hem. )

Consequence

PDK3
NM_005391.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.97

Variant links:

Genes affected

PDK3 (HGNC:8811): (pyruvate dehydrogenase kinase 3) 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). It provides the primary link between glycolysis and the tricarboxylic acid (TCA) cycle, and thus is one of the major enzymes responsible for the regulation of glucose metabolism. The enzymatic activity of PDH is regulated by a phosphorylation/dephosphorylation cycle, and phosphorylation results in inactivation of PDH. The protein encoded by this gene is one of the three pyruvate dehydrogenase kinases that inhibits the PDH complex by phosphorylation of the E1 alpha subunit. This gene is predominantly expressed in the heart and skeletal muscles. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2010]

PDK3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.858

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PDK3	NM_005391.5 linkuse as main transcript	c.149G>A	p.Arg50Gln	missense_variant	2/11	ENST00000379162.9
PDK3	NM_001142386.3 linkuse as main transcript	c.149G>A	p.Arg50Gln	missense_variant	2/12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PDK3	ENST00000379162.9 linkuse as main transcript	c.149G>A	p.Arg50Gln	missense_variant	2/11	1	NM_005391.5	P1	Q15120-1
PDK3	ENST00000568479.2 linkuse as main transcript	c.149G>A	p.Arg50Gln	missense_variant	2/12				Q15120-2
PDK3	ENST00000493226.2 linkuse as main transcript	n.361G>A		non_coding_transcript_exon_variant	2/3	5
PDK3	ENST00000648777.1 linkuse as main transcript	c.149G>A	p.Arg50Gln	missense_variant, NMD_transcript_variant	2/12				Q15120-1

Frequencies

GnomAD3 genomes

AF:

0.00000890

AC:

AN:

112330

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34504

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000562

AC:

AN:

177918

Hom.:

AF XY:

0.0000160

AC XY:

AN XY:

62664

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000124

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000461

AC:

AN:

1083575

Hom.:

Cov.:

AF XY:

0.00000286

AC XY:

AN XY:

349753

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000188

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000361

Gnomad4 OTH exome

AF:

0.0000219

GnomAD4 genome

AF:

0.00000890

AC:

AN:

112330

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34504

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000188

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000120

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Charcot-Marie-Tooth disease X-linked dominant 6

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 25, 2024

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 50 of the PDK3 protein (p.Arg50Gln). This variant is present in population databases (rs757407648, gnomAD 0.002%), including at least one homozygous and/or hemizygous individual. This variant has not been reported in the literature in individuals affected with PDK3-related conditions. ClinVar contains an entry for this variant (Variation ID: 937678). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt PDK3 protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Uncertain

0.12

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.19

T;.

FATHMM_MKL

Uncertain

0.91

LIST_S2

Pathogenic

0.98

.;D

M_CAP

Uncertain

0.18

MetaRNN

Pathogenic

0.86

D;D

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.4

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Pathogenic

0.85

PROVEAN

Uncertain

-3.3

D;D

REVEL

Uncertain

0.45

Sift

Benign

0.068

T;T

Sift4G

Benign

0.17

T;T

Polyphen

1.0

D;.

Vest4

0.71

MutPred

0.70

Loss of sheet (P = 0.0457);Loss of sheet (P = 0.0457);

MVP

0.88

MPC

1.2

ClinPred

0.84

GERP RS

6.2

Varity_R

0.86

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over