Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
27
pubmed:dateCreated
2004-6-28
pubmed:databankReference
pubmed:abstractText
In yeast and higher plants, separate genes encode the cytosolic and mitochondrial forms of glyoxalase II. In contrast, although glyoxalase II activity has been detected both in the cytosol and mitochondria of mammals, only a single gene encoding glyoxalase II has been identified. Previously it was thought that this gene (the hydroxyacylglutathione hydrolase gene), comprised 8 exons that are transcribed into mRNA and that the resulting mRNA species encoded a single cytosolic form of glyoxalase II. Here we show that this gene gives rise to two distinct mRNA species transcribed from 9 and 10 exons, respectively. The 9-exon-derived transcript encodes two protein species: mitochondrially targeted glyoxylase II, which is initiated from an AUG codon in a previously uncharacterized part of the mRNA sequence, and cytosolic glyoxalase II, which is initiated by internal ribosome entry at a downstream AUG codon. The transcript deriving from 10 exons has an in-frame termination codon between the two initiating AUG codons and hence only encodes the cytosolic form of the protein. Confocal fluorescence microscopy indicates that the mitochondrially targeted form of glyoxalase II is directed to the mitochondrial matrix. Analysis of glyoxalase II mRNA sequences from a number of species indicates that dual initiation from alternative AUG codons is conserved throughout vertebrates.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
2
pubmed:volume
279
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
28653-61
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:15117945-Alternative Splicing, pubmed-meshheading:15117945-Amino Acid Sequence, pubmed-meshheading:15117945-Animals, pubmed-meshheading:15117945-Base Sequence, pubmed-meshheading:15117945-Blotting, Western, pubmed-meshheading:15117945-Cell Line, pubmed-meshheading:15117945-Codon, pubmed-meshheading:15117945-Cytosol, pubmed-meshheading:15117945-DNA, Complementary, pubmed-meshheading:15117945-Exons, pubmed-meshheading:15117945-Genes, Reporter, pubmed-meshheading:15117945-Humans, pubmed-meshheading:15117945-Immunoblotting, pubmed-meshheading:15117945-Luciferases, pubmed-meshheading:15117945-Microscopy, Confocal, pubmed-meshheading:15117945-Microscopy, Fluorescence, pubmed-meshheading:15117945-Mitochondria, pubmed-meshheading:15117945-Molecular Sequence Data, pubmed-meshheading:15117945-Mutagenesis, Site-Directed, pubmed-meshheading:15117945-Mutation, pubmed-meshheading:15117945-Plasmids, pubmed-meshheading:15117945-Promoter Regions, Genetic, pubmed-meshheading:15117945-Protein Structure, Secondary, pubmed-meshheading:15117945-Protein Structure, Tertiary, pubmed-meshheading:15117945-RNA, Messenger, pubmed-meshheading:15117945-Recombinant Fusion Proteins, pubmed-meshheading:15117945-Reverse Transcriptase Polymerase Chain Reaction, pubmed-meshheading:15117945-Ribosomes, pubmed-meshheading:15117945-Thiolester Hydrolases
pubmed:year
2004
pubmed:articleTitle
The Human hydroxyacylglutathione hydrolase (HAGH) gene encodes both cytosolic and mitochondrial forms of glyoxalase II.
pubmed:affiliation
Academic Unit of Molecular Vascular Medicine, Leeds Institute for Genetics Health and Therapeutics, Faculty of Medicine and Health, University of Leeds, Leeds LS1 3EX, United Kingdom.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't