The family name Heliobacteriaceae is not validly published. The purpose of this note is to provide a description of this family in accordance with the Rules of the Bacteriological Code (1990 Revision).
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Evolution of cytochrome bc complexes: from membrane-anchored dehydrogenases of ancient bacteria to triggers of apoptosis in vertebrates.
Biochim Biophys Acta
December 2013
School of Physics, University of Osnabrueck, D-49069 Osnabrueck, Germany; School of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow 119992, Russia; Institute of Mitoengineering, Lomonosov Moscow State University, Moscow 119992, Russia.
This review traces the evolution of the cytochrome bc complexes from their early spread among prokaryotic lineages and up to the mitochondrial cytochrome bc1 complex (complex III) and its role in apoptosis. The results of phylogenomic analysis suggest that the bacterial cytochrome b6f-type complexes with short cytochromes b were the ancient form that preceded in evolution the cytochrome bc1-type complexes with long cytochromes b. The common ancestor of the b6f-type and the bc1-type complexes probably resembled the b6f-type complexes found in Heliobacteriaceae and in some Planctomycetes.
View Article and Find Full Text PDFThe FX iron-sulfur cluster serves as the terminal bound electron acceptor in heliobacterial reaction centers.
Photosynth Res
March 2012
Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA.
Phototrophs of the family Heliobacteriaceae contain the simplest known Type I reaction center (RC), consisting of a homodimeric (PshA)(2) core devoid of bound cytochromes and antenna proteins. Unlike plant and cyanobacterial Photosystem I in which the F(A)/F(B) protein, PsaC, is tightly bound to P(700)-F(X) cores, the RCs of Heliobacterium modesticaldum contain two F(A)/F(B) proteins, PshBI and PshBII, which are loosely bound to P(800)-F(X) cores. These two 2[4Fe-4S] ferredoxins have been proposed to function as mobile redox proteins, reducing downstream metabolic partners much in the same manner as does [2Fe-2S] ferredoxin or flavodoxin (Fld) in PS I.
View Article and Find Full Text PDFProposal of Heliobacteriaceae fam. nov.
Int J Syst Evol Microbiol
July 2010
Department of Microbiology, Southern Illinois University, Carbondale IL 62901, USA.
The family name Heliobacteriaceae is not validly published. The purpose of this note is to provide a description of this family in accordance with the Rules of the Bacteriological Code (1990 Revision).
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