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FEBS Lett ; 367(3): 291-6, 1995 Jul 03.
Article in English | MEDLINE | ID: mdl-7607326

ABSTRACT

Expression of the liver-type isopeptides of cytochrome c oxidase is regulated post-transcriptionally. An RNA-binding activity has been found in only those cells where the liver-type subunits are detected. This binding protein, termed COLBP, recognises sequences or structures within the 3'-untranslated regions of transcripts encoding these liver-type isopeptides and has been implicated in the modulation of mRNA expression. We now show by subcellular fractionation, immunocompetition, UV-crosslinking and shift-Western studies that the metabolic enzyme glutamate dehydrogenase, previously reported as being able to bind RNA, is the cytochrome c oxidase transcript-binding protein, COLBP.


Subject(s)
Electron Transport Complex IV/genetics , Glutamate Dehydrogenase/metabolism , Liver/enzymology , RNA, Messenger/metabolism , RNA-Binding Proteins/chemistry , RNA-Binding Proteins/metabolism , Animals , Cattle , Gene Expression Regulation , In Vitro Techniques , Mitochondria, Liver/chemistry , RNA, Messenger/genetics , Rats
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