Detection of a homozygous four base pair deletion in the protein X gene in a case of pyruvate dehydrogenase complex deficiency.

Abstract:

:While the presence of a lipoyl-containing protein (protein X) separate from lipoyl transacetylase in the pyruvate dehydrogenase complex (PDC) has been known for some time, until recently only the cDNA for the yeast enzyme has been cloned. We have cloned, sequenced and characterized the cDNA encoding the human protein X and localized the protein X gene to chromosome 11p13. We also report here a new case of protein X deficiency identified immunologically, with decreased activity of PDC and without mutations in the E1alpha subunit or E1beta subunit. We report that the cDNA and gene of this patient for protein X has a homozygous 4 bp deletion, specifically in the putative mitochondrial targeting signal sequence which results in a premature stop codon. This is the first documented case of a molecular defect in pyruvate dehydrogenase protein X.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Ling M,McEachern G,Seyda A,MacKay N,Scherer SW,Bratinova S,Beatty B,Giovannucci-Uzielli ML,Robinson BH

doi

10.1093/hmg/7.3.501

subject

Has Abstract

pub_date

1998-03-01 00:00:00

pages

501-5

issue

3

eissn

0964-6906

issn

1460-2083

pii

ddb045

journal_volume

7

pub_type

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