A HupSL és Hox1 NiFe hidrogenáz enzimek összehangolt szabályozásának vizsgálata Thiocapsa roseopersicina baktériumban

2016 ◽  
Author(s):  
Ildikó Katalin Nagy
Keyword(s):  
Thiocapsa Roseopersicina

Реконструкция HYDSL гидрогеназы Thiocapsa roseopersicina BBS после ингибирования цианидом

2021 ◽  
Vol 57 (3) ◽  
pp. 245-250
Author(s):  
Н. А. Зорин ◽  
А. Н. Хуснутдинова ◽  
А. С. Стародубов ◽  
И. И. Проскуряков ◽  
А. А. Цыганков
Keyword(s):  
Thiocapsa Roseopersicina

scholarly journals Homology modeling of the spatial structure of HydSL hydrogenase from purple sulphur bacterium Thiocapsa roseopersicina BBS

2013 ◽  
Vol 5 (4) ◽  
pp. 737-747 ◽  
Author(s):  
Azat Vadimovich Abdullatypov ◽  
Anatoly Anatolyevich Tsygankov
Keyword(s):  
Spatial Structure ◽  
Homology Modeling ◽  
Thiocapsa Roseopersicina ◽  
Purple Sulphur Bacterium

scholarly journals The role of Hox hydrogenase in the H2 metabolism of Thiocapsa roseopersicina

2007 ◽  
Vol 1767 (6) ◽  
pp. 671-676 ◽  
Author(s):  
Gábor Rákhely ◽  
Tatyana V. Laurinavichene ◽  
Anatoly A. Tsygankov ◽  
Kornél L. Kovács
Keyword(s):  
Thiocapsa Roseopersicina ◽  
H2 Metabolism

Growth and metabolism of the purple sulfur bacterium Thiocapsa roseopersicina under combined light/dark and oxic/anoxic regimens

1990 ◽  
Vol 154 (5) ◽  
pp. 459-464 ◽  
Author(s):  
Rutger de Wit ◽  
Hans van Gemerden
Keyword(s):  
Purple Sulfur Bacterium ◽  
Thiocapsa Roseopersicina

Ammonia Assimilation by Thiocapsa roseopersicina Grown on Various Nitrogen and Carbon/Electron Sources

1980 ◽  
Vol 35 (5-6) ◽  
pp. 439-444 ◽  
Author(s):  
Eckhard Bast
Keyword(s):  
Amino Acids ◽  
Glutamate Synthase ◽  
Nitrogen Sources ◽  
Ammonia Assimilation ◽  
Synthetic Activity ◽  
Transferase Activity ◽  
Organic Substrates ◽  
Batch Cultures ◽  
Electron Sources ◽  
Thiocapsa Roseopersicina

Abstract Batch cultures of the phototrophic bacterium, Thiocapsa roseopersicina, were grown anaero­ bically in the light either on sulfide with various ammonia concentrations, N 2 or amino acids as nitrogen sources, or on several simple organic substrates in the absence of reduced sulfur com­ pounds using 6 mM NH4Cl as source of nitrogen. At high ammonia concentrations high activities of (NADPH-linked) glutamate dehydrogenase (GDH), but rather low transferase and no bio­ synthetic activity of glutamine synthetase (GS) were obtained, while under conditions of ammonia deficiency (growth with N 2 or glutamate) GDH activity was very low and both GS activities were strongly increased. Glutamate synthase (GOGAT) activity (NADH-dependent) showed little variation. These data indicate that at high NH+ concentrations ammonia is assimilated via GDH, under NHJ limitation, however, via the GS/GOGAT system. Glutamine as nitrogen source may be utilized via GOGAT as well as via an active glutaminase plus GDH. Ammonia, but not glutamine, seems to cause repression and inactivation of GS. Alanine and asparagine inactivate the enzyme inhibiting the biosynthetic, but not the transferase activity. These amino acids in part also influence the activities of GDH, GOGAT, malate dehydrogenase (MDH) and isocitrate dehydrogenase (ICDH). Cultures grown on acetate or pyruvate instead of sulfide showed increased GDH activities and high GS transferase activities possibly reflecting an increase of intracellular a-ketoglutarate concentration. On malate or fructose also increased GS transferase activities, but rather low GDH activities were observed. High biosynthetic GS activities and elevated GOGAT activities were found only in fructose-grown cells. On the organic substrates the ICDH activities always were somewhat higher than after lithoautotrophic growth. With the exception of acetate, the MDH activities were considerably elevated, especially on pyruvate. The different pathways of ar-keto-glutarate formation and their influence on the enzymes of ammonia assimilation are discussed.

Effect of Hg2+ on HydSL Hydrogenase of the Purple Sulfur Bacteria Thiocapsa roseopersicina BBS

2020 ◽  
Vol 56 (2) ◽  
pp. 149-153
Author(s):  
N. A. Zorin ◽  
A. S. Starodubov ◽  
A. A. Tsygankov
Keyword(s):  
Purple Sulfur Bacteria ◽  
Thiocapsa Roseopersicina ◽  
Sulfur Bacteria

Hydrogen Enhances Nickel Tolerance in the Purple Sulfur Bacterium Thiocapsa roseopersicina

2010 ◽  
Vol 44 (2) ◽  
pp. 834-840 ◽  
Author(s):  
Oleg A. Zadvornyy ◽  
Mark Allen ◽  
Susan K. Brumfield ◽  
Zack Varpness ◽  
Eric S. Boyd ◽  
...  
Keyword(s):  
Purple Sulfur Bacterium ◽  
Nickel Tolerance ◽  
Thiocapsa Roseopersicina
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