Biogenesis of membrane bound respiratory complexes in Escherichia coli.
Escherichia coli is one of the preferred bacteria for studies on the energetics and regulation of respiration. Respiratory chains consist of primary dehydrogenases and terminal reductases or oxidases linked by quinones. In order to assemble this complex arrangement of protein complexes, synthesis of the subunits occurs in the cytoplasm followed by assembly in the cytoplasm and/or membrane, the incorporation of metal or organic cofactors and the anchoring of the complex to the membrane. In the case of exported metalloproteins, synthesis, assembly and incorporation of metal cofactors must be completed before translocation across the cytoplasmic membrane. Coordination data on these processes is, however, scarce. In this review, we discuss the various processes that respiratory proteins must undergo for correct assembly and functional coupling to the electron transport chain in E. coli. Targeting to and translocation across the membrane together with cofactor synthesis and insertion are discussed in a general manner followed by a review of the coordinated biogenesis of individual respiratory enzyme complexes. Lastly, we address the supramolecular organization of respiratory enzymes into supercomplexes and their localization to specialized domains in the membrane.
Department of Molecular Microbiology, University of Groningen, 9751 NN Haren, The Netherlands.
Claire E
CE
Price
Arnold J M
AJ
Driessen
D025181:ATP Synthetase Complexes / Q000378:metabolism; D001120:Arginine / Q000378:metabolism; D002462:Cell Membrane / Q000378:metabolism; D003593:Cytoplasm / Q000378:metabolism; D004579:Electron Transport; D004926:Escherichia coli / Q000378:metabolism*; D029968:Escherichia coli Proteins / Q000378:metabolism; D015964:Gene Expression Regulation, Bacterial; D008565:Membrane Proteins / Q000378:metabolism*; D026901:Membrane Transport Proteins / Q000378:metabolism; D008954:Models, Biological; D008958:Models, Molecular; D008968:Molecular Conformation; D010447:Peptide Hydrolases / Q000378:metabolism; D011487:Protein Conformation; D017510:Protein Folding
D029968:Escherichia coli Proteins; D008565:Membrane Proteins; D026901:Membrane Transport Proteins; C412443:YIDC protein, E coli; D001120:Arginine; D025181:ATP Synthetase Complexes; D010447:Peptide Hydrolases