By Patrick C. Hallenbeck
ISBN-10: 331951363X
ISBN-13: 9783319513638
ISBN-10: 3319513656
ISBN-13: 9783319513652
This booklet deals authoritative contributions via global specialists actively engaged on various elements of phototrophic prokaryotes. supplying updated info during this speedily advancing box, it covers the variety of subject matters which are at the moment the focal point of analysis with this crew of organisms. As basically single-celled organisms, phototrophic prokaryotes technique many environmental signs and use this knowledge to optimize their metabolism, development cost, DNA replication and mobile division.
Phototrophic prokaryotes are jointly of serious curiosity for a couple of varied basic and utilized views and feature lengthy served as versions for realizing such uncomplicated basic organic approaches as photosynthesis and breathing. On an ecological/environmental point they're very important, being the main plentiful photosynthetic organisms on the earth and accountable for nearly all of the first productiveness within the oceans. additionally they carry nice promise as biotechnological catalysts, having the ability to couple solar power conversion via photosynthesis and carbon fixation to the creation of biofuels, commodity chemical compounds and nutraceuticals.
The ebook is usually recommended to complicated scholars and scientists facing lifestyles sciences, specifically in genetics, microbiology and molecular biology.
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Extra resources for Modern Topics in the Phototrophic Prokaryotes: Metabolism, Bioenergetics, and Omics
Sample text
Left: Heme 1 is coordinated by His53 and Cys96. Right: Heme 2 is coordinated by His His165 and Lys208. Upon reduction, a ligand switch from Lys208 to Met209 occurs. Sulfur atoms are shown in green from Lys to Met axial ligation. This change probably affects the redox potential of Heme 2 and may be an important step during the reaction cycle (Brito et al. 2015). TsdA enzymes of various source organisms exhibit different catalytic bias (Kurth et al. 2015). While the enzyme from the sulfur oxidizer A.
An overview of the currently proposed model of sulfur oxidation in A. vinosum is shown in Fig. 1. The figure is based on a combination of biochemical evidence, genome sequence information, as well as whole genome transcriptomic profiling and comparative quantitative proteomics (Weissgerber et al. 2011, 2013, 2014a). Many enzymes involved in sulfur metabolism can readily be identified in genome sequences by sequence homology with known enzymes. The genome sequences of 15 strains of GSB have already been available for several years, and the occurrence of genes related to sulfur oxidation in these organisms has already been extensively tabulated and discussed (Frigaard and Bryant 2008b; Frigaard and Dahl 2009; Gregersen et al.
2012). In A. vinosum, the protein with the closest relationship to T. intermedia or P. stutzeri TsdB is Alvin_2879. This cytochrome c4 (previously cytochrome c-553(550)) is membrane bound possibly via the hydrophobic protein Alvin_2880 and has a positive redox potential of +330 mV (Cusanovich and Bartsch 1969). Sulfur Metabolism in Phototrophic Bacteria 37 Fig. 3 Model of Sox-mediated thiosulfate oxidation in Paracoccus pantotrophus (left) and (a) A. vinosum (right). Adapted from (Sander and Dahl 2009).
Modern Topics in the Phototrophic Prokaryotes: Metabolism, Bioenergetics, and Omics by Patrick C. Hallenbeck
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