5H59

Ferredoxin-NADP+ reductase from maize root

5H59 の概要

• エントリーDOI: 10.2210/pdb5h59/pdb
• 関連するPDBエントリー: 5H57 5H5J
• 分子名称: Ferredoxin--NADP reductase, FLAVIN-ADENINE DINUCLEOTIDE (3 entities in total)
• 機能のキーワード: flavoenzyme, oxidoreductase
• 由来する生物種: Zea mays (Maize)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 35662.06

構造登録者

Kurisu, G.,Hase, T. (登録日: 2016-11-04, 公開日: 2017-02-01, 最終更新日: 2023-11-08)

主引用文献

Shinohara, F.,Kurisu, G.,Hanke, G.,Bowsher, C.,Hase, T.,Kimata-Ariga, Y.
Structural basis for the isotype-specific interactions of ferredoxin and ferredoxin: NADP(+) oxidoreductase: an evolutionary switch between photosynthetic and heterotrophic assimilation
Photosyn. Res., 134:281-289, 2017

PubMed Abstract: In higher plants, ferredoxin (Fd) and ferredoxin-NADP reductase (FNR) are each present as distinct isoproteins of photosynthetic type (leaf type) and non-photosynthetic type (root type). Root-type Fd and FNR are considered to facilitate the electron transfer from NADPH to Fd in the direction opposite to that occurring in the photosynthetic processes. We previously reported the crystal structure of the electron transfer complex between maize leaf FNR and Fd (leaf FNR:Fd complex), providing insights into the molecular interactions of the two proteins. Here we show the 2.49 Å crystal structure of the maize root FNR:Fd complex, which reveals that the orientation of FNR and Fd remarkably varies from that of the leaf FNR:Fd complex, giving a structural basis for reversing the redox path. Root FNR was previously shown to interact preferentially with root Fd over leaf Fd, while leaf FNR retains similar affinity for these two types of Fds. The structural basis for such differential interaction was investigated using site-directed mutagenesis of the isotype-specific amino acid residues on the interface of Fd and FNR, based on the crystal structures of the FNR:Fd complexes from maize leaves and roots. Kinetic and physical binding analyses of the resulting mutants lead to the conclusion that the rearrangement of the charged amino acid residues on the Fd-binding surface of FNR confers isotype-specific interaction with Fd, which brings about the evolutional switch between photosynthetic and heterotrophic redox cascades.

PubMed: 28093652
DOI: 10.1007/s11120-016-0331-1

実験手法

X-RAY DIFFRACTION (1.65 Å)