Exciton Description of Chlorosome to Baseplate Excitation Energy Transfer in Filamentous Anoxygenic Phototrophs and Green Sulfur Bacteria

2013 ◽  
Vol 117 (38) ◽  
pp. 11144-11161 ◽  
Author(s):  
Juha M. Linnanto ◽  
Jouko E. I. Korppi-Tommola
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Green Sulfur Bacteria ◽  
Anoxygenic Phototrophs ◽  
Sulfur Bacteria ◽  
Green Sulfur

scholarly journals Excitation energy transfer kinetics and efficiency in phototrophic green sulfur bacteria

2018 ◽  
Vol 1859 (10) ◽  
pp. 1180-1190 ◽  
Author(s):  
Nikki Cecil M. Magdaong ◽  
Dariusz M. Niedzwiedzki ◽  
Rafael G. Saer ◽  
Carrie Goodson ◽  
Robert E. Blankenship
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Green Sulfur Bacteria ◽  
Sulfur Bacteria ◽  
Green Sulfur

scholarly journals Two Genes Encoding New Carotenoid-Modifying Enzymes in the Green Sulfur Bacterium Chlorobium tepidum

2006 ◽  
Vol 188 (17) ◽  
pp. 6217-6223 ◽  
Author(s):  
Julia A. Maresca ◽  
Donald A. Bryant
Keyword(s):  
Green Sulfur Bacteria ◽  
The Other ◽  
Chlorobium Tepidum ◽  
Green Sulfur Bacterium ◽  
Gene Encoding ◽  
Anoxygenic Phototrophs ◽  
Sulfur Bacteria ◽  
Genes Encoding ◽  
Green Sulfur ◽  
Predicted Function

ABSTRACT The green sulfur bacterium Chlorobium tepidum produces chlorobactene as its primary carotenoid. Small amounts of chlorobactene are hydroxylated by the enzyme CrtC and then glucosylated and acylated to produce chlorobactene glucoside laurate. The genes encoding the enzymes responsible for these modifications of chlorobactene, CT1987, and CT0967, have been identified by comparative genomics, and these genes were insertionally inactivated in C. tepidum to verify their predicted function. The gene encoding chlorobactene glucosyltransferase (CT1987) has been named cruC, and the gene encoding chlorobactene lauroyltransferase (CT0967) has been named cruD. Homologs of these genes are found in the genomes of all sequenced green sulfur bacteria and filamentous anoxygenic phototrophs as well as in the genomes of several nonphotosynthetic bacteria that produce similarly modified carotenoids. The other bacteria in which these genes are found are not closely related to green sulfur bacteria or to one another. This suggests that the ability to synthesize modified carotenoids has been a frequently transferred trait.

Chlorosomes of green sulfur bacteria: Pigment composition and energy transfer

1994 ◽  
Vol 41 (1) ◽  
pp. 193-203 ◽  
Author(s):  
Paula I. van Noort ◽  
Christof Francke ◽  
Nicole Schoumans ◽  
Stephan C. M. Otte ◽  
Thijs J. Aartsma ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Green Sulfur Bacteria ◽  
Pigment Composition ◽  
Sulfur Bacteria ◽  
Green Sulfur

scholarly journals In situabundance and carbon fixation activity of distinct anoxygenic phototrophs in the stratified seawater lake Rogoznica

2019 ◽  
Author(s):  
Petra Pjevac ◽  
Stefan Dyksma ◽  
Tobias Goldhammer ◽  
Izabela Mujakić ◽  
Michal Koblížek ◽  
...  
Keyword(s):  
Inorganic Carbon ◽  
Carbon Fixation ◽  
Green Sulfur Bacteria ◽  
Purple Sulfur Bacteria ◽  
Purple Sulfur Bacterium ◽  
Anoxygenic Phototrophs ◽  
Flow Cytometric ◽  
Sulfur Bacteria ◽  
Chlorobium Phaeobacteroides ◽  
Green Sulfur

AbstractSulfide-driven anoxygenic photosynthesis is an ancient microbial metabolism that contributes significantly to inorganic carbon fixation in stratified, sulfidic water bodies. Methods commonly applied to quantify inorganic carbon fixation by anoxygenic phototrophs, however, cannot resolve the contributions of distinct microbial populations to the overall process. We implemented a straightforward workflow, consisting of radioisotope labeling and flow cytometric cell sorting based on the distinct autofluorescence of bacterial photo pigments, to discriminate and quantify contributions of co-occurring anoxygenic phototrophic populations toin situinorganic carbon fixation in environmental samples. This allowed us to assign 89.3 ±7.6% of daytime inorganic carbon fixation by anoxygenic phototrophs in Lake Rogoznica (Croatia) to an abundant chemocline-dwelling population of green sulfur bacteria (dominated byChlorobium phaeobacteroides), whereas the co-occurring purple sulfur bacteria (Halochromatiumsp.) contributed only 1.8 ±1.4%. Furthermore, we obtained two metagenome assembled genomes of green sulfur bacteria and one of a purple sulfur bacterium which provides the first genomic insights into the genusHalochromatium, confirming its high metabolic flexibility and physiological potential for mixo-and heterotrophic growth.

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