title: Biogenesis of cbb(3)-type cytochrome c oxidase in Rhodobacter capsulatus.
abstract: The cbb(3)-type cytochrome c oxidases (cbb(3)-Cox) constitute the second most abundant cytochrome c oxidase (Cox) group after the mitochondrial-like aa(3)-type Cox. They are present in bacteria only, and are considered to represent a primordial innovation in the domain of Eubacteria due to their phylogenetic distribution and their similarity to nitric oxide (NO) reductases. They are crucial for the onset of many anaerobic biological processes, such as anoxygenic photosynthesis or nitrogen fixation. In addition, they are prevalent in many pathogenic bacteria, and important for colonizing low oxygen tissues. Studies related to cbb(3)-Cox provide a fascinating paradigm for the biogenesis of sophisticated oligomeric membrane proteins. Complex subunit maturation and assembly machineries, producing the c-type cytochromes and the binuclear heme b(3)-Cu(B) center, have to be coordinated precisely both temporally and spatially to yield a functional cbb(3)-Cox enzyme. In this review we summarize our current knowledge on the structure, regulation and assembly of cbb(3)-Cox, and provide a highly tentative model for cbb(3)-Cox assembly and formation of its heme b(3)-Cu(B) binuclear center. This article is part of a Special Issue entitled: Biogenesis/Assembly of Respiratory Enzyme Complexes.
authors.affiliation: University of Pennsylvania, Department of Biology, Philadelphia, PA 19104, USA.
authors.forename: Seda
authors.initials: S
authors.lastname: Ekici
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Pawlik
authors.forename: Eva
authors.initials: E
authors.lastname: Lohmeyer
authors.forename: Hans-Georg
authors.initials: HG
authors.lastname: Koch
authors.forename: Fevzi
authors.initials: F
authors.lastname: Daldal
mesh_terms: D000818:Animals; D001426:Bacterial Proteins / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics; D003576:Electron Transport Complex IV / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics; D015964:Gene Expression Regulation, Bacterial; D006418:Heme / Q000378:metabolism; D006801:Humans; D008563:Membrane Lipids / Q000378:metabolism / Q000502:physiology; D055503:Protein Multimerization; D020836:Protein Structure, Quaternary; D021122:Protein Subunits / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics; D016354:Rhodobacter capsulatus / Q000201:enzymology* / Q000235:genetics
chemical_list: D001426:Bacterial Proteins; D008563:Membrane Lipids; D021122:Protein Subunits; D006418:Heme; D003576:Electron Transport Complex IV
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