Alternative cyanide-sensitive oxidase interacting with photosynthesis in synechocystis PCC6803. Ancestor of the terminal oxidase of chlororespiration?

Title:

Alternative cyanide-sensitive oxidase interacting with photosynthesis in synechocystis PCC6803. Ancestor of the terminal oxidase of chlororespiration?

Creator:

Büchel, C., Zsíros, O., and Garab, G.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:7b5f3301-db89-4340-ab48-422eb0e586f9
uuid:7b5f3301-db89-4340-ab48-422eb0e586f9
issn:0300-3604
doi:10.1023/A:1006958706540

Subject:

absorbance, azide, cyanobacteria, cytochromes, flash radiation, KCN, NaN3, phylogeny, respiration, and salicyl hydroxamic acid

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Influence of respiration on photosynthesis in Synechocystis PCC6803 was studied by measuring the redox transients of cytochrome f (cyt f) upon excitation of the cells with repetitive single turnover flashes. Upon the addition of KCN the flash-induced oxidation of cyt f was increased and the rereduction of cyt f+ was accelerated. Dependence of these effects on the concentration of KCN clearly demonstrated the existence of two cyanide-sensitive oxidases interacting with photosynthesis: cyt aa3, which was sensitive to low concentrations of cyanide, and an alternative oxidase, which could be suppressed by using ≥1 mM KCN. The interaction between the photosynthetic and the respiratory electron transport chains was regulated mainly by the activity of the alternative cyanide-sensitive oxidase. The oxidative pathway involving the alternative cyanide-sensitive oxidase was insensitive to salicyl hydroxamic acid and azide. The close resemblance of the inhibition pattern reported here and that described for chlororespiration in algae and higher plants strongly suggest that an oxidase of the same type as the alternative cyanide-sensitive oxidase of cyanobacteria functions as a terminal oxidase in chloroplasts. and C. Büchel, O. Zsíros, G. Garab.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

223-231

Source:

Photosynthetica | 1998 Volume:35 | Number:2

Harvested from:

CDK

Metadata only:

false