Photosynthesis NADP reductase

Karplus, P., M. Daniels, and J. Herriott. Atomic Structure of Ferredoxin-NADP Reductase Prototype for a Structurally Novel Flavoenzyme Family. Science 251, 60-66 (1991). [The structure of a key enzyme involved in nitrogen and sulfur metabolism, as well as in photosynthesis.]... 

The biological functions of chloroplast ferredoxins are to mediate electron transport in the photosynthetic reaction. These ferredoxins receive electrons from light-excited chlorophyll, and reduce NADP in the presence of ferredoxin-NADPH reductase (23). Another function of chloroplast ferredoxins is the formation oT" ATP in oxygen-evolving noncyclic photophosphorylation (24). With respect to the photoreduction of NADP, it is known that microbial ferredoxins from C. pasteurianum (16) are capable of replacing the spinach ferredoxin, indicating the functional similarities of ferredoxins from completely different sources. The functions of chloroplast ferredoxins in photosynthesis and the properties of these ferredoxin proteins have been reviewed in detail by Orme-Johnson (2), Buchanan and Arnon (3), Bishop (25), and Yocum et al. ( ). 

In plants, [2Fe-2S] ferredoxins are involved in conjunction with ferredoxin-reductase in photosynthesis reactions and the transfer of electrons from photosystem I to NADP . However, evidence for involvement of ferredoxins in electron transfer to plant P450s awaits a more detailed characterization of the multiple P450 systems present in the biotechnologically important plant species. 

Rodriguez, R.E., Lodeyro, A., Poli, H.O., Zurbriggen, M., Peisker, M., Palatnik, J.R, Tognetti, V.B., Tschiersch, H., Hajirezaei, M.R., Valle, E.M., and Carrillo, N. (2007). Transgenic tobacco plants overexpressing chloroplastic ferredoxin-NADP(H) reductase display normal rates of photosynthesis and increased tolerance to oxidative stress. Plant Physiol. 143, 639-649. 

De La Vara LG, Gomez-Lojero C Participation of plastoquinone, cytochrome c 553 and ferrodoxin-NADP+ oxido-reductase in both photosynthesis and respiration in Spiruhna maxima, Photosynth R S 8(1) 65—78, 1986. 

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