Osobennosti funktsionirovaniia dvukh molekuliarnykh form ferredoksina gorokha v tsepi élektronnogo transporta khloroplastov.

Translated title of the contribution: Two molecular forms of pea ferredoxin in the electron transport chain of chloroplasts

V. K. Gins, A. N. Tikhonov, E. N. Mukhin, E. K. Ruuge

Research output: Contribution to journalArticle

Abstract

The effects of two molecular forms of water-soluble ferredoxin (Fd I and Fd II) on the kinetics of electron transport in bean chloroplasts (class B) were studied. The light-induced redox transitions of the photosystem I reaction center P700 were measured by the intensity of the EPR signal I produced by P700+. Both forms of ferredoxin, Fd I and Fd II, when added to the chloroplasts in catalytic amounts, stimulate the light-induced electron transfer from P700 to NADP+. Nevertheless, Fd I is a better mediator of the back reactions from NADPH to P700+. This electron transfer pathway is sensitive to the cyclic electron transport inhibitor, antimycin A, and to DCMU inhibitor of electron transport between photosystem II and plastoquinone. It may be concluded that the two molecular forms of ferredoxin, Fd I and Fd II, differ in their ability to catalyze cyclic electron transport in photosystem I. The role of Fd I and Fd II in regulation of electron transport at the acceptor site of photosystem I is discussed.

Original languageRussian
Pages (from-to)1859-1866
Number of pages8
JournalBiokhimiya
Volume47
Issue number11
Publication statusPublished - Nov 1982
Externally publishedYes

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Ferredoxins
Photosystem I Protein Complex
NADP
Plastoquinone
Diuron
Antimycin A
Photosystem II Protein Complex
Electrons
Paramagnetic resonance
Electron Transport
Kinetics
Water

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Osobennosti funktsionirovaniia dvukh molekuliarnykh form ferredoksina gorokha v tsepi élektronnogo transporta khloroplastov. / Gins, V. K.; Tikhonov, A. N.; Mukhin, E. N.; Ruuge, E. K.

In: Biokhimiya, Vol. 47, No. 11, 11.1982, p. 1859-1866.

Research output: Contribution to journalArticle

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