Catalytic reduction of dioxygen with modified Thermus thermophilus cytochrome c552

Cytochrome bc1 Complex: Potential Breach to Improve the Activity of Phenazines on Xanthomonas

“…The deletion mutant of XC_1968 exhibited decreased H 2 O 2 tolerance on NA plates, which was consistent with the deleted mutant of the CCM system, TAT pathway, and cytochrome bc1 complex (Figures and ). , Although H 2 O 2 is one member of the ROS substance, our previous studies have demonstrated that tolerance mechanisms of the CCM system and TAT pathway to PCA in Xcc were discrete with the ROS scavenging ability. , The results in this study are consistent with our previous conclusion and verify that the regulatory mechanisms of the cytochrome bc1 complex in tolerating PCA and H 2 O 2 were different. The decreased H 2 O 2 tolerance of the cytochrome bc1 mutant results from the crack of the electron transport process to cytochrome c552, which was also reported to catalyze the oxidation process of H 2 O 2 to H 2 O and O 2 in Thermus thermophilus …”

“…The basic function of the respiratory chain in organisms is generating the proton motive force, which is required in producing ATP . Besides generating ATP, the electron channeled by the cytochrome bc1 complex and different cytochrome c proteins to various terminal oxidases may result in a diversified effect, including degrading H 2 O 2 , inducing apoptosis, and some unknown influence. − …”

“…The decreased H 2 O 2 tolerance of the cytochrome bc1 mutant results from the crack of the electron transport process to cytochrome c552, which was also reported to catalyze the oxidation process of H 2 O 2 to H 2 O and O 2 in Thermus thermophilus. 45 Consequent to the great impact of the cytochrome bc1 complex on the tolerance of Xanthomonas to phenazines, the thought of whether the combined utilization of PCA and the cytochrome bc1 inhibitor can improve their effect on pathogens was hatched. However, known inhibitors of the cytochrome bc1 complex of eukaryotes, such as antimycin A and strobilurins, were all ineffective to Xanthomonas spp., even at a 100 mg/L concentration (data not shown).…”

Electrocatalytic Performance of Carbon Supported WO3-Containing Pd–W Nanoalloys for Oxygen Reduction Reaction in Alkaline Media

“…As the energy efficiency and battery voltage of electrochemical cells are limited by the slow kinetics of the ORR [1,2], there is a great need for highly efficient catalysts for ORR. Various electrocatalysts for ORR have been developed, including but not limited to Pt-based catalysts [3][4][5], Pd-based catalysts [6,7], catalysts based on non-precious metals [8,9], catalysts based on carbon nanostructure/nanocomposites [10][11][12][13], catalysts based on metal oxides [14,15], catalysts based on metal-organic frameworks [16,17], catalysts based on complexes [18,19], enzyme-based catalysts [20][21][22][23][24], metal carbides [25][26][27][28], and so on. Among the catalysts for ORR, Pt-based catalysts are regarded as the most active catalysts [29].…”