Literature DB >> 3191138

pH-dependence of photo-induced electron transfer in zinc-substituted sperm whale myoglobin.

A C Shosheva1, P K Christova, B P Atanasov.   

Abstract

The electron transfer between the excited triplet state of zinc-substituted sperm whale myoglobin and Cu2+ has been studied by following the decay rate of delayed fluorescence. The Cu2+ bound on the surface of the myoglobin molecule are efficient quenchers of the excited electron state of Zn-myoglobin. Two bimolecular rate constants of quenching (KQ) for every pH investigated have been calculated. The pH-dependence of KQ1 indicates that the protonation of one amino acid residue (His-GH1 (119] is important for the process. Our results support the idea of the common nature of the mechanism of quenching by Cu2+ and oxidation of oxymyoglobin by Cu2+.

Entities:  

Mesh：

Substances：

Year:  1988        PMID： 3191138     DOI： 10.1016/0167-4838(88)90273-7

Source DB:  PubMed          Journal:  Biochim Biophys Acta        ISSN： 0006-3002


  3 in total

1.  Stereoselective and driving-force-dependent photoinduced electron-transfer reactions of zinc myoglobin with optically active N,N'-dimethylcinchoninium and N,N'-dimethylcinchonidinium ions.

Authors:  Hiroshi Takashima; Ayako Araki; Keiko Takemoto; Naokazu Yoshikawa; Keiichi Tsukahara
Journal:  J Biol Inorg Chem       Date:  2006-02-21       Impact factor: 3.358

2.  Remarkably stereoselective photoinduced electron-transfer reaction between zinc myoglobin and optically active binaphthyl bisviologen.

Authors:  Hiroshi Takashima; Michiru Tanaka; Yuko Hasegawa; Keiichi Tsukahara
Journal:  J Biol Inorg Chem       Date:  2003-02-15       Impact factor: 3.358

3.  Synthesis and photophysical properties of zinc myoglobin appending an ethidium ion as a DNA intercalator.

Authors:  Hiroshi Takashima; Yukiko Matsushima; Yasuyuki Araki; Osamu Ito; Keiichi Tsukahara
Journal:  J Biol Inorg Chem       Date:  2007-10-18       Impact factor: 3.358
  3 in total

北京卡尤迪生物科技股份有限公司 © 2022-2023.