rs119103240

Positions:

• chr11-112061088-C-A

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_001931.5(DLAT):​c.1728C>A​(p.Phe576Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000411 in 1,461,172 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: DLAT NM_001931.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2 U:1
• Conservation: PhyloP100: 1.94

Genes affected

DLAT (HGNC:2896): (dihydrolipoamide S-acetyltransferase) This gene encodes component E2 of the multi-enzyme pyruvate dehydrogenase complex (PDC). PDC resides in the inner mitochondrial membrane and catalyzes the conversion of pyruvate to acetyl coenzyme A. The protein product of this gene, dihydrolipoamide acetyltransferase, accepts acetyl groups formed by the oxidative decarboxylation of pyruvate and transfers them to coenzyme A. Dihydrolipoamide acetyltransferase is the antigen for antimitochondrial antibodies. These autoantibodies are present in nearly 95% of patients with the autoimmune liver disease primary biliary cirrhosis (PBC). In PBC, activated T lymphocytes attack and destroy epithelial cells in the bile duct where this protein is abnormally distributed and overexpressed. PBC enventually leads to cirrhosis and liver failure. Mutations in this gene are also a cause of pyruvate dehydrogenase E2 deficiency which causes primary lactic acidosis in infancy and early childhood.[provided by RefSeq, Oct 2009]

PIH1D2 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.969
• PP5: Variant 11-112061088-C-A is Pathogenic according to our data. Variant chr11-112061088-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 2110.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=1, Likely_pathogenic=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DLAT	NM_001931.5	c.1728C>A	p.Phe576Leu	missense_variant	13/14	ENST00000280346.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DLAT	ENST00000280346.11	c.1728C>A	p.Phe576Leu	missense_variant	13/14	1	NM_001931.5	P3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000120 AC: 3 AN: 250540 Hom.: 0 AF XY: 0.0000222 AC XY: 3 AN XY: 135430

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: 0.0000656

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000883

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000411 AC: 6 AN: 1461172 Hom.: 0 Cov.: 30 AF XY: 0.00000550 AC XY: 4 AN XY: 726876

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: 0.0000232

Gnomad4 FIN exome AF: 0.0000187

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2 Uncertain:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Pyruvate dehydrogenase E2 deficiency Pathogenic:2 Uncertain:1

Pathogenic, no assertion criteria provided	literature only	OMIM	Aug 01, 2005	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Victorian Clinical Genetics Services, Murdoch Childrens Research Institute	Dec 21, 2023	Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as VUS-3B. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with pyruvate dehydrogenase E2 deficiency (MIM#245348). (I) 0106 - This gene is associated with autosomal recessive disease. (I) 0200 - Variant is predicted to result in a missense amino acid change from phenylalanine to leucine. (I) 0251 - This variant is heterozygous. (I) 0304 - Variant is present in gnomAD <0.01 for a recessive condition (3 heterozygotes, 0 homozygotes). (SP) 0502 - Missense variant with conflicting in silico predictions and uninformative conservation. (I) 0600 - Variant is located in the annotated 2-oxoacid dehydrogenases acyltransferase catalytic domain (DECIPHER). (I) 0705 - No comparable missense variants have previous evidence for pathogenicity. (I) 0803 - This variant has limited previous evidence of pathogenicity in two unrelated individuals. This variant has been submitted to ClinVar once as pathogenic. This variant was also identified in a homozygous individual with pyruvate dehydrogenase deficiency (PMID: 16049940). (SP) 0905 - No published segregation evidence has been identified for this variant. (I) 1001 - This variant has strong functional evidence supporting abnormal protein function. Patient fibroblasts from a homozygous individual showed reduced PHD activity, which increased to normal levels after treatment with transfected WT DLAT gene (PMID: 16049940). (SP) 1206 - This variant has been shown to be paternally inherited (by trio analysis). (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -
Likely pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jul 12, 2022	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Pathogenic	0.15
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.47	T;T;T
Eigen	Uncertain	0.38
Eigen_PC	Uncertain	0.24
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	0.99	D;D;D
M_CAP	Uncertain	0.10	D
MetaRNN	Pathogenic	0.97	D;D;D
MetaSVM	Uncertain	-0.061	T
MutationAssessor	Pathogenic	4.0	H;.;.
MutationTaster	Benign	1.0	A;A;A
PrimateAI	Pathogenic	0.86	D
PROVEAN	Pathogenic	-5.9	D;D;D
REVEL	Uncertain	0.59
Sift	Uncertain	0.0030	D;D;D
Sift4G	Uncertain	0.0050	D;D;D
Polyphen		0.99	D;D;.
Vest4		0.93
MutPred		0.98		Gain of ubiquitination at K574 (P = 0.1679);.;.;
MVP		0.57
MPC		1.0
ClinPred		0.99	D
GERP RS		0.84
Varity_R		0.90
gMVP		0.87

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

Other links and lift over

dbSNP: rs119103240; hg19: chr11-111931812;