Sökning: "proton-pumping mechanism"

Visar resultat 6 - 10 av 16 avhandlingar innehållade orden proton-pumping mechanism.

1. 6. Studies on the mechanism of ATP synthesis in energy transducing systems

   Författare :Jeff Boork; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The aim of this investigation was to study the mechanism by which ATP is phosphorylated to ATP in chromatophores, mitochondria and chloroplasts. All these particles seem to have a similar way of transducing energy liberated in the electron transport chain into the energy-rich compound ATP. LÄS MER

3. 7. On the antiporter-like subunits of respiratory chain Complex I - implications for the evolution and coupling mechanism of the NADH:quinone oxidoreductase enzyme complex

   Författare :Cecilie Mathiesen; Biokemi och Strukturbiologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Metabolism; Biokemi; metabolism; Biochemistry; mrp; electron transport; respiration; membrane protein;

   Sammanfattning : Complex I or NADH:quinone oxidoreductase is the largest enzyme complex, but the least understood energy coupling site in the respiratory chain of mitochondria and bacteria. No high-resolution structural information exists for this enzyme and the molecular mechanism that couples electron transfer and proton pumping is not understood. LÄS MER

4. 8. Proton pathways in energy conversion : K-pathway analogs in O2- and NO-reductases

   Författare :Nathalie Gonska; Pia Ädelroth; Alessandro Giuffré; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; heme-copper oxidase; cytochrome c oxidase; membrane protein; respiration; electron transfer; proton transfer; redox reaction; metalloprotein; non-heme iron; cytochrome ba3; flow-flash; carbon monoxide; liposome; respiratory control ratio; Biochemistry; biokemi;

   Sammanfattning : Oxygen and nitric oxide reductases are enzymes found in aerobic and anaerobic respiration, respectively. Both enzyme groups belong to the superfamily of Heme-Copper Oxidases, which is further divided into several subgroups: oxygen-reducing enzymes into A-, B- and C-type and nitric oxide reductases into qNORs and cNORs. LÄS MER

5. 9. Kinetics of proton and electron transfer in heme-copper oxidases

   Författare :Peter Lachmann; Pia Ädelroth; Örjan Hansson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Heme-copper oxidase; electron transfer; proton transfer; nitric oxide reductase; ba3 oxidase; flow-flash; laser-flash photolysis; Biochemistry; biokemi;

   Sammanfattning : Heme-copper oxidases are transmembrane proteins that are found in aerobic and anaerobic respiratory chains. During aerobic respiration, these enzymes reduce dioxygen to water. The energy released in the reaction is used to transport protons across a biological membrane. LÄS MER

7. 10. Control Mechanisms of Electron and Proton Transfer in Cytochrome c Oxidase

   Författare :Martin Karpefors; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Cytochrome c oxidase is a remarkable molecular machine that is bound in the inner mitochondrial membrane or in the cell membrane of bacteria. Using the free energy that is released when electrons from foodstuff are transferred to molecular oxygen, protons are translocated from the inner to the outer side of the membrane. LÄS MER