Changes in protein synthesis as a consequence of heme depletion in Escherichia coli.
Two-dimensional gel electrophoresis and N-terminal amino acid sequence determination were used to compare the protein synthesis of exponentially growing Escherichia coli with heme-deficient cells. Mutation of the E. coli hemA gene encoding glutamyl-tRNA reductase resulted in the absence of detectable amounts of heme. As a consequence of heme deficiency, the induction of tryptophanase (trpA), citrate synthase (gltA), and aldehyde dehydrogenase (aldA) and the repression of enolase (eno) and phosphoglycerate kinase (pgk) were observed. All induced genes are under the control of the catabolite repressor protein Crp. The observed changes in gene expression as a consequence of heme depletion are discussed.
Rompf
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Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg i. Br., Germany.
Schmid
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R
Jahn
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D000445:Aldehyde Oxidoreductases / Q000235:genetics; D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000096:biosynthesis* / Q000235:genetics / Q000302:isolation & purification; D015180:Electrophoresis, Gel, Two-Dimensional; D004926:Escherichia coli / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D005798:Genes, Bacterial; D006418:Heme / Q000378:metabolism*; D008969:Molecular Sequence Data; D009154:Mutation; D017386:Sequence Homology, Amino Acid
D001426:Bacterial Proteins; D006418:Heme; D000445:Aldehyde Oxidoreductases; C067282:glutamyl tRNA reductase