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- Title
A ferredoxin Arg-Glu pair important for efficient electron transfer between ferredoxin and ferredoxin-NADP<sup>+</sup> reductase
- Authors
Teshima, Keizo; Fujita, Shinobu; Hirose, Syuuichi; Nishiyama, Daisuke; Kurisu, Genji; Kusunoki, Masami; Kimata-Ariga, Yoko; Hase, Toshiharu
- Abstract
In order to elucidate the importance of a ferredoxin (Fd) Arg-Glu pair involved in dynamic exchange from intra- to intermolecular salt bridges upon complex formation with ferredoxin-NADP+ oxidoreductase (FNR), Equisetum arvense FdI and FdII were investigated as normal and the pair-lacking Fd, respectively. The FdI mutant lacking this pair was unstable and rapidly lost the [2Fe–2S] cluster. The catalytic constant (kcat) of the electron transfer for FdI is 5.5 times that for FdII and the introduction of this pair into FdII resulted in the increase of kcat to a level comparable to that for FdI, demonstrating directly that the Arg-Glu pair is important for efficient electron transfer between Fd and FNR.
- Subjects
MATRIX-assisted laser desorption-ionization; FERREDOXIN-NADP reductase
- Publication
FEBS Letters, 2003, Vol 546, Issue 2/3, p189
- ISSN
0014-5793
- Publication type
Article
- DOI
10.1016/S0014-5793(03)00559-3