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721 results on '"Komori H"'

54. Comprehensive data on ionising radiation from Fukushima Daiichi nuclear power plant in the town of Miharu, Fukushima prefecture: The Misho Project

Author

Koike, T, primary, Suzuki, Y, additional, Genyu, S, additional, Kobayashi, I, additional, Komori, H, additional, Otsu, H, additional, Sakuma, H, additional, Sakuma, K, additional, Sarausad, E M, additional, Shimada, K, additional, Shinozuka, T, additional, Tamura, H, additional, Tsukada, K, additional, Ukai, M, additional, and Yamamoto, T O, additional

Published
2014
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60. Strategic roles of axial histidines in structure formation and redox regulation of tetraheme cytochrome c3

Author

Takayama, Y, Werbeck, N D, Komori, H, Morita, K, Ozawa, Kiyoshi, Higuchi, Y, Akutsu, H, Takayama, Y, Werbeck, N D, Komori, H, Morita, K, Ozawa, Kiyoshi, Higuchi, Y, and Akutsu, H

Abstract

Tetraheme cytochrome c3 (cyt c3) exhibits extremely low reduction potentials and unique properties. Since axial ligands should be the most important factors for this protein, every axial histidine of Desulfovibrio vulgaris Miyazaki F cyt c3 was replaced with methionine, one by one. On mutation at the fifth ligand, the relevant heme could not be linked to the polypeptide, revealing the essential role of the fifth histidine in heme linking. The fifth histidine is the key residue in the structure formation and redox regulation of a c-type cytochrome. A crystal structure has been obtained for only H25M cyt c3. The overall structure was not affected by the mutation except for the sixth methionine coordination at heme 3. NMR spectra revealed that each mutated methionine is coordinated to the sixth site of the relevant heme in the reduced state, while ligand conversion takes place at hemes 1 and 4 during oxidation at pH 7. The replacement of the sixth ligand with methionine caused an increase in the reduction potential of the mutated heme of 222-244 mV. The midpoint potential of a triheme H52M cyt c3 is higher than that of the wild type by ∼50 mV, suggesting a contribution of the tetraheme architecture to the lowering of the reduction potentials. The hydrogen bonding of Thr24 with an axial ligand induces a decrease in reduction potential of ∼50 mV. In conclusion, the bis-histidine coordination is strategically essential for the structure formation and the extremely low reduction potential of cyt c 3. © 2008 American Chemical Society.

Published
2008

75. Application of microdroplet PCR for large-scale targeted bisulfite sequencing

Author

Komori, H. Kiyomi, primary, LaMere, Sarah A., additional, Torkamani, Ali, additional, Hart, G. Traver, additional, Kotsopoulos, Steve, additional, Warner, Jason, additional, Samuels, Michael L., additional, Olson, Jeff, additional, Head, Steven R., additional, Ordoukhanian, Phillip, additional, Lee, Pauline L., additional, Link, Darren R., additional, and Salomon, Daniel R., additional

Published
2011
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84. Structural study of H2O2reductase, rubperoxin

Author

Nishikawa, K., primary, Shomura, Y., additional, Kawasaki, S., additional, Sakai, Y., additional, Niimura, Y., additional, Terawaki, S., additional, Komori, H., additional, Shibata, N., additional, and Higuchi, Y., additional

Published
2008
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