Time-resolved resonance Raman elucidation of the pathway for dioxygen reduction by cytochrome c oxidase

1993 ◽  
Vol 115 (19) ◽  
pp. 8527-8536 ◽  
Author(s):  
Takashi Ogura ◽  
Satoshi Takahashi ◽  
Shun Hirota ◽  
Kyoko Shinzawa-Itoh ◽  
Shinya Yoshikawa ◽  
...  
Author(s):  
Teizo Kitagawa ◽  
Takashi Ogura ◽  
Shun Hirota ◽  
Denis A. Proshlyakov ◽  
Jorg Matysik ◽  
...  

Author(s):  
Takashi Ogura ◽  
Denis A. Proshlyakov ◽  
Jörg Matysik ◽  
Evan H. Appelman ◽  
Kyoko Shinzawa-Itoh ◽  
...  

2012 ◽  
Vol 41 (2) ◽  
pp. 178-180 ◽  
Author(s):  
Izumi Ishigami ◽  
Takeshi Nishigaki ◽  
Kyoko Shinzawa-Itoh ◽  
Shinya Yoshikawa ◽  
Satoru Nakashima ◽  
...  

Biochemistry ◽  
1993 ◽  
Vol 32 (27) ◽  
pp. 6923-6927 ◽  
Author(s):  
Stephen R. Lynch ◽  
Richard H. Carter ◽  
Robert A. Copeland

2005 ◽  
Vol 45 (supplement) ◽  
pp. S229
Author(s):  
M. Yamada ◽  
S. Yamaguchi ◽  
T. Ogura ◽  
S. Yoshikawa

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3393
Author(s):  
Elena Gorbikova ◽  
Sergey A. Samsonov ◽  
Ruslan Kalendar

Crystal structure analyses at atomic resolution and FTIR spectroscopic studies of cytochrome c oxidase have yet not revealed protonation or deprotonation of key sites of proton transfer in a time-resolved mode. Here, a sensitive technique to detect protolytic transitions is employed. In this work, probing a proton-loading site of cytochrome c oxidase from Paracoccus denitrificans with time-resolved Fourier transform infrared spectroscopy is presented for the first time. For this purpose, variants with single-site mutations of N131V, D124N, and E278Q, the key residues in the D-channel, were studied. The reaction of mutated CcO enzymes with oxygen was monitored and analyzed. Seven infrared bands in the “fast” kinetic spectra were found based on the following three requirements: (1) they are present in the “fast” phases of N131V and D124N mutants, (2) they have reciprocal counterparts in the “slow” kinetic spectra in these mutants, and (3) they are absent in “fast” kinetic spectra of the E278Q mutant. Moreover, the double-difference spectra between the first two mutants and E278Q revealed more IR bands that may belong to the proton-loading site protolytic transitions. From these results, it is assumed that several polar residues and/or water molecule cluster(s) share a proton as a proton-loading site. This site can be propionate itself (holding only a fraction of H+), His403, and/or water cluster(s).


2009 ◽  
Vol 49 (supplement) ◽  
pp. S118
Author(s):  
Miyuki Sakaguchi ◽  
Kyoko Shinzawa-Itoh ◽  
Shinya Yoshikawa ◽  
Hiroshi Fujii ◽  
Takashi Ogura

2009 ◽  
Vol 113 (8) ◽  
pp. 2492-2497 ◽  
Author(s):  
Marc Grosserueschkamp ◽  
Marcel G. Friedrich ◽  
Markus Plum ◽  
Wolfgang Knoll ◽  
Renate L. C. Naumann

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