scholarly journals Electron Transfer Pathways in a Multiheme Cytochrome MtrF

2017 ◽  
Vol 57 (3) ◽  
pp. 151-152
Author(s):  
Hiroshi WATANABE ◽  
Yuki YAMASHITA ◽  
Hiroshi ISHIKITA
Keyword(s):  
Electron Transfer ◽  
Electron Transfer Pathways ◽  
Multiheme Cytochrome

scholarly journals Electron transfer pathways in a multiheme cytochrome MtrF

2017 ◽  
Vol 114 (11) ◽  
pp. 2916-2921 ◽  
Author(s):  
Hiroshi C. Watanabe ◽  
Yuki Yamashita ◽  
Hiroshi Ishikita
Keyword(s):  
Electron Transfer ◽  
Binding Sites ◽  
Heme Binding ◽  
Binding Domains ◽  
Poisson Boltzmann ◽  
Electron Transfer Pathways ◽  
Poisson Boltzmann Equation ◽  
Dynamics Simulations ◽  
Flavin Binding ◽  
Multiheme Cytochrome

In MtrF, an outer-membrane multiheme cytochrome, the 10 heme groups are arranged in heme binding domains II and IV along the pseudo-C2 axis, forming the electron transfer (ET) pathways. Previous reports based on molecular dynamics simulations showed that the redox potential (Em) values for the heme pairs located in symmetrical positions in domains II and IV were similar, forming bidirectional ET pathways [Breuer M, Zarzycki P, Blumberger J, Rosso KM (2012) J Am Chem Soc 134(24):9868–9871]. Here, we present the Em values of the 10 hemes in MtrF, solving the linear Poisson–Boltzmann equation and considering the protonation states of all titratable residues and heme propionic groups. In contrast to previous studies, the Em values indicated that the ET is more likely to be downhill from domain IV to II because of localization of acidic residues in domain IV. Reduction of hemes in MtrF lowered the Em values, resulting in switching to alternative downhill ET pathways that extended to the flavin binding sites. These findings present an explanation of how MtrF serves as an electron donor to extracellular substrates.

scholarly journals Electron transfer pathways in photoexcited lanthanide(III) complexes of picolinate ligands

2021 ◽  
Author(s):  
Daniel Kovacs ◽  
Daniel Kocsi ◽  
Jordann A. L. Wells ◽  
Salauat R. Kiraev ◽  
Eszter Borbas
Keyword(s):  
Electron Transfer ◽  
Metal Binding ◽  
Binding Sites ◽  
Secondary Amide ◽  
Metal Binding Sites ◽  
Electron Transfer Pathways

A series of luminescent lanthanide(III) complexes consisting of 1,4,7-triazacyclononane frameworks and three secondary amide-linked carbostyril antennae were synthesised. The metal binding sites were augmented with two pyridylcarboxylate donors yielding octadentate...

Control of Electron Transfer Pathways in a Dye-Sensitized Solar Cell

2006 ◽  
Vol 97 (20) ◽  
Author(s):  
Ben Brüggemann ◽  
Juan Angel Organero ◽  
Torbjörn Pascher ◽  
Tõnu Pullerits ◽  
Arkady Yartsev
Keyword(s):  
Electron Transfer ◽  
Solar Cell ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Electron Transfer Pathways

One and two electron transfer pathways in the photoreduction of flavin

1982 ◽  
Vol 54 (9) ◽  
pp. 1651-1665 ◽  
Author(s):  
R. Traber ◽  
H. E. A. Kramer ◽  
Peter Hemmerich
Keyword(s):  
Electron Transfer ◽  
Electron Transfer Pathways

Dual electron transfer pathways from the excited C60 radical anion: enhanced reactivities due to the photoexcitation of reaction intermediates

2015 ◽  
Vol 17 (46) ◽  
pp. 31030-31038 ◽  
Author(s):  
Mamoru Fujitsuka ◽  
Tatsuya Ohsaka ◽  
Tetsuro Majima
Keyword(s):  
Electron Transfer ◽  
Radical Anion ◽  
Reaction Intermediates ◽  
Electron Transfer Pathways

The excited C60 radical anion showed enhanced electron transfer.

scholarly journals Cellular Metabolites Enhance the Light Sensitivity ofArabidopsisCryptochrome through Alternate Electron Transfer Pathways

2014 ◽  
Vol 26 (11) ◽  
pp. 4519-4531 ◽  
Author(s):  
Christopher Engelhard ◽  
Xuecong Wang ◽  
David Robles ◽  
Julia Moldt ◽  
Lars-Oliver Essen ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Light Sensitivity ◽  
Electron Transfer Pathways

Proton–electron transfer pathways in the reactions of peroxyl and dpph˙ radicals with hydrogen-bonded phenols

2012 ◽  
Vol 48 (97) ◽  
pp. 11904 ◽  
Author(s):  
Riccardo Amorati ◽  
Stefano Menichetti ◽  
Caterina Viglianisi ◽  
Mario C. Foti
Keyword(s):  
Electron Transfer ◽  
Electron Transfer Pathways ◽  
Hydrogen Bonded
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