The LH2 Complexes (B800-850 and B800-830) Are Assembled in the Cells of the Sulfur Bacterium Thiorhodospira sibirica Strain Kir-3 without Carotenoids

  title={The LH2 Complexes (B800-850 and B800-830) Are Assembled in the Cells of the Sulfur Bacterium Thiorhodospira sibirica Strain Kir-3 without Carotenoids},
  author={Maksim Bolshakov and Aleksandr A Ashikhmin and Zoya K Makhneva and Andrey A Moskalenko},
  journal={Doklady Biochemistry and Biophysics},
  pages={287 - 291}
The results of assembling the light-harvesting complexes in the cells of the purple sulfur bacterium Thiorhodospira (T.) sibirica strain Kir-3 while suppressing the biosynthesis of carotenoids with diphenylamine (DPA) were studied. LH2 complexes (B800-850 and B800-830) with different carotenoid composition were isolated from the cells obtained. Maximum inhibition of carotenoid biosynthesis (~90% of the control) was reached at an inhibitor concentration of 53.25 μM (9 mg/L). It was established… 


The LH2 complexes are assembled in the cells of purple sulfur bacterium Ectothiorhodospira haloalkaliphila with inhibition of carotenoid biosynthesis
DPA almost entirely inhibits the biosynthesis of the colored Cars in Ect.haloalkaliphila cells, suggesting that the principles for assembling this LH2 complex in vivo in the absence of colored Cars remain the same.
Peripheral light-harvesting LH2 complex can be assembled in cells of nonsulfur purple bacterium Rhodoblastus acidophilus without carotenoids
The data suggest that a certain part of the LH2 complexes is assembled without carotenoids in cells of the nonsulfur bacterium Rbl.
Spirilloxanthin incorporation into the LH2 and LH1-RC pigment-protein complexes from a purple sulfur bacterium Allochromatium minutissimum
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The origin of the split B800 absorption peak in the LH2 complexes from Allochromatium vinosum
The best agreement between simulation and experiment is found for a ring-like oligomer of 12 repeat units, where the mutual arrangement of the B800 and B850 rings resembles those from Rsp.
Heterogeneity of carotenoid content and composition in LH2 of the purple sulphur bacterium Allochromatium minutissimum grown under carotenoid-biosynthesis inhibition
It is shown that the LH2 can be assembled without any Cars, although the presence of Cars, however, is important for structural stability of LH2 complexes.
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Effect of Light with Different Spectral Composition on Cell Growth and Pigment Composition of the Membranes of Purple Sulfur Bacteria Allochromatium minutissimum and Allochromatium vinosum
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