scholarly journals Ectothiorhodospira halochloris sp. nov., a new extremely halophilic phototrophic bacterium containing bacteriochlorophyll b

1977 ◽  
Vol 114 (2) ◽  
pp. 115-121 ◽  
Author(s):  
Johannes F. Imhoff ◽  
Hans G. Tr�per
Keyword(s):  
Phototrophic Bacterium ◽  
Ectothiorhodospira Halochloris ◽  
Bacteriochlorophyll B

⊿2,10-Phytadienol as Esterifying Alcohol of Bacteriochlorophyll b from Ectothiorhodospira halochloris

1981 ◽  
Vol 36 (5-6) ◽  
pp. 417-420 ◽  
Author(s):  
R. Steiner ◽  
W. Schäfer ◽  
I. Bios ◽  
H. Wieschhoff ◽  
H. Scheer
Keyword(s):  
Mass Spectroscopy ◽  
Hplc Analysis ◽  
Photosynthetic Bacterium ◽  
Vis Spectroscopy ◽  
Ectothiorhodospira Halochloris ◽  
Bacteriochlorophyll B ◽  
The One

Abstract Bacteriochlorophyll b (bchl b) has been isolated from the halophilic photosynthetic bacterium, Ectothiorhodospira halochloris. The pigment and a series of derivatives thereof are different from Bchl b from Rhodopseudomonas viriais by HPLC analysis, but similar by uv-vis spectroscopy. The chromatographic difference originates in different esterifying alcohols in the two pigments. The one from Rp. viridis (Bchl bp) is esterified with ⊿2-phytaenol (phytol), that from E. halochloris (Bchl b⊿2,10) with ⊿2,10-phytadienol. The structure of the latter has been established by isolation of the alcohol from the purified pigment, followed by (i) gaschromatography-mass spectroscopy and (ii) ozonolysis and dinitrophenylhydrazon-formation of the cleavage products, which were identified by gaschromatography-mass spectroscopy as 6-methyl-heptan-2-one, and 4-methyl-nona-1,8-dione.

Structural analysis of the photosynthetic membrane from Ectothiorhodospira halochloris

1983 ◽  
Vol 41 ◽  
pp. 740-741
Author(s):  
H. Engelhardt ◽  
R. Guckenberger ◽  
W. Baumeister
Keyword(s):  
Lattice Structure ◽  
Bacterial Species ◽  
Hexagonal Lattice ◽  
Reaction Centre ◽  
Photosynthetic Membrane ◽  
Rhodopseudomonas Viridis ◽  
Photosynthetic Membranes ◽  
Ectothiorhodospira Halochloris ◽  
Main Components

Bacterial photosynthetic membranes contain, apart from lipids and electron transport components, reaction centre (RC) and light harvesting (LH) polypeptides as the main components. The RC-LH complexes in Rhodopseudomonas viridis membranes are known since quite seme time to form a hexagonal lattice structure in vivo; hence this membrane attracted the particular attention of electron microscopists. Contrary to previous claims in the literature we found, however, that 2-D periodically organized photosynthetic membranes are not a unique feature of Rhodopseudomonas viridis. At least five bacterial species, all bacteriophyll b - containing, possess membranes with the RC-LH complexes regularly arrayed. All these membranes appear to have a similar lattice structure and fine-morphology. The lattice spacings of the Ectothiorhodospira haloohloris, Ectothiorhodospira abdelmalekii and Rhodopseudomonas viridis membranes are close to 13 nm, those of Thiocapsa pfennigii and Rhodopseudomonas sulfoviridis are slightly smaller (∼12.5 nm).

scholarly journals The radical cation of bacteriochlorophyll b. A liquid-phase endor and triple resonance study

1986 ◽  
Vol 126 (3-4) ◽  
pp. 290-296 ◽  
Author(s):  
F. Lendzian ◽  
W. Lubitz ◽  
R. Steiner ◽  
E. Tränkle ◽  
M. Plato ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Radical Cation ◽  
Triple Resonance ◽  
Bacteriochlorophyll B

Ectothiorhodospira vacuolata sp. nov., a new phototrophic bacterium from soda lakes

1981 ◽  
Vol 130 (3) ◽  
pp. 238-242 ◽  
Author(s):  
Johannes F. Imhoff ◽  
Brian J. Tindall ◽  
William D. Grant ◽  
Hans G. Tr�per
Keyword(s):  
Soda Lakes ◽  
Phototrophic Bacterium

scholarly journals Afifella aestuarii sp. nov., a phototrophic bacterium

2020 ◽  
Vol 70 (1) ◽  
pp. 327-333 ◽  
Author(s):  
Sailaja Buddhi ◽  
Suresh G. ◽  
Deepshikha Gupta ◽  
Sasikala Ch. ◽  
Ramana Ch. V.
Keyword(s):  
Phototrophic Bacterium
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