A redox-dependent interaction between two electron-transfer partners involved in photosynthesis.

Autor: Morales, Renaud, Charon, Marie-Hélène, Kachalova, Galina, Serre, Laurence, Medina, Milagros, Gómez-Moreno, Carlos, Frey, Michel
Předmět:
Zdroj: EMBO Reports; Sep2000, Vol. 1 Issue 3, p271-276, 6p
Abstrakt: Ferredoxin:NADP+:reductase (FNR) catalyzes one terminal step of the conversion of light energy into chemical energy during photosynthesis. FNR uses two high energy electrons photoproduced by photosystem I (PSI) and conveyed, one by one, by a ferredoxin (Fd), to reduce NADP+ to NADPH. The reducing power of NADPH is finally involved in carbon assimilation. The interaction between oxidized FNR and Fd was studied by crystallography at 2.4 Å resolution leading to a three-dimensional picture of an Fd-FNR biologically relevant complex. This complex suggests that FNR and Fd specifically interact prior to each electron transfer and disassemble upon a redox-linked conformational change of the Fd. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index