Genetic Variant PDK4:p.Leu178Ile (chr7-95592595-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_002612.4(PDK4):c.532C>A(p.Leu178Ile) variant causes a missense, splice region change. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

PDK4
NM_002612.4 missense, splice_region

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.29

Variant links:

Genes affected

PDK4 (HGNC:8812): (pyruvate dehydrogenase kinase 4) This gene is a member of the PDK/BCKDK protein kinase family and encodes a mitochondrial protein with a histidine kinase domain. This protein is located in the matrix of the mitrochondria and inhibits the pyruvate dehydrogenase complex by phosphorylating one of its subunits, thereby contributing to the regulation of glucose metabolism. Expression of this gene is regulated by glucocorticoids, retinoic acid and insulin. [provided by RefSeq, Jul 2008]

PDK4 links:

PDK4-AS1 (HGNC:55767): (PDK4 antisense RNA 1)

PDK4-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PDK4	NM_002612.4 link	c.532C>A	p.Leu178Ile	missense_variant, splice_region_variant	Exon 5 of 11	ENST00000005178.6	NP_002603.1	Q16654A4D1H4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PDK4	ENST00000005178.6 link	c.532C>A	p.Leu178Ile	missense_variant, splice_region_variant	Exon 5 of 11	1	NM_002612.4	ENSP00000005178.5		Q16654

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251058

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135706

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1442758

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

719106

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 22, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.532C>A (p.L178I) alteration is located in exon 5 (coding exon 5) of the PDK4 gene. This alteration results from a C to A substitution at nucleotide position 532, causing the leucine (L) at amino acid position 178 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.31

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Benign

0.19

Eigen

Uncertain

0.25

Eigen_PC

Uncertain

0.38

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.93

M_CAP

Benign

0.015

MetaRNN

Uncertain

0.59

MetaSVM

Benign

-0.94

MutationAssessor

Uncertain

2.3

PrimateAI

Uncertain

0.71

PROVEAN

Benign

-1.4

REVEL

Benign

0.23

Sift

Benign

0.14

Sift4G

Benign

0.20

Polyphen

0.023

Vest4

0.62

MutPred

0.68

Loss of catalytic residue at L178 (P = 0.0076);

MVP

0.56

MPC

0.51

ClinPred

0.64

GERP RS

5.8

Varity_R

0.70

gMVP

0.56

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

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