Photooxidation and photoreduction of exogenous cytochrome c by photosystem II preparations after various modifications of the water-oxidizing complex

Title:

Photooxidation and photoreduction of exogenous cytochrome c by photosystem II preparations after various modifications of the water-oxidizing complex

Creator:

Khorobrykh, A. A., Yanykin, D. V., and Klimov, V. V.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:6e5c54d1-f7a6-49e9-8229-c124b8d9f50f
uuid:6e5c54d1-f7a6-49e9-8229-c124b8d9f50f
issn:0300-3604
doi:10.1007/s11099-017-0762-8

Subject:

cytochromy, cytochromes, cytochrome c, photooxidation, photoreduction, photosystem II, superoxide anion radical, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

The redox interaction of exogenous cytochrome c550 (Cyt) with PSII isolated from spinach was studied. Illumination of PSII particles in the presence of Cyt led to: (1) Cyt photooxidation by PSII reaction center (demonstrated at the first time), (2) Cyt photoreduction via O2- photoproduced on the acceptor side of PSII, and (3) Cyt photoreduction by reduced electron carriers of PSII. A step-by-step removal of components of water-oxidizing complex was accompanied by the appearance of Cyt photooxidation, an increase in the superoxide dismutase (SOD)-dependent Cyt photoreduction (related to O2- formation), and a decrease in the SOD-independent Cyt photoreduction. Re-addition of PsbO protein diminished the Cyt-induced restoration of electron transfer in PSII. Addition of diuron led to inhibition of these photoprocesses, while exogenous Mn2+ inhibited only the Cyt c photooxidation. The results can be important for correct measurements of O2- photoproduction in PSII and for elucidation of the role of cytochrome c550 in cyanobacterial PSII., A. A. Khorobrykh, D. V. Yanykin, V. V. Klimov., and Obsahuje bibliografické odkazy

Language:

Multiple languages

Rights:

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

Coverage:

244-253

Source:

Photosynthetica | 2018 Volume:56 | Number:1

Harvested from:

CDK

Metadata only:

false