Sökning: "oxidases"

Visar resultat 1 - 5 av 34 avhandlingar innehållade ordet oxidases.

  1. 1. Structural studies on the integral membrane protein, ubiquinol oxidase from Escherichia coli

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Jeff Abramson; Uppsala universitet.; [2001]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biochemistry; crystal structure; ubiquinol oxidase; membrane protein; oxidases; Biokemi; NATURAL SCIENCES Chemistry Biochemistry; NATURVETENSKAP Kemi Biokemi; biokemi; Biochemistry;

    Sammanfattning : Heme-copper oxidases are redox-driven proton pumps that couple the reduction of molecular oxygen to water with the vectorial translocation of protons across the membrane. The proton gradient generated by heme-copper oxidases and the other members of the aerobic respiratory chain is ultimately used to drive the synthesis of ATP. LÄS MER

  2. 2. Amine oxidases in dental pulp a study with special regard to a semicarbazide-sensitive amine oxidase with catalytic potency towards serotonin

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Astrid Norqvist-Sjöberg; Lars Oreland; []

    Sammanfattning : The amine oxidizing capacity of piglet dental pulp tissue has been investigated. At least six separate enzyme activities could be distinguished:- a soluble semicarbazide-sensitive (SSAO) activity towards benzylamine, most likely to be derived from the content of blood plasma within the pulp tissue;- a soluble pulp tissue SSAO activity with most properties in common with the plasma enzyme, however with great efficiency not only regarding benzylamine but also tryptamine;- a tissue bound SSAO activity with activity towards benzylamine, tryptamine, tyramine and ß-phenylethylamine;- a tissue bound semicarbazide-sensitive activity towards serotonin (SSA0-5HT) (a combination of properties never reported before);- a mitochondrially bound and clorgyline-sensitive monoamine oxidase-A (MAO-A) activity with activity towards serotonin;- a mitochondrially bound and deprenyl-sensitive MAO-B activity with activity towards e. LÄS MER

  3. 3. Proton transfer in nitric oxide reducing heme-copper oxidases

    Detta är en avhandling från Stockholm : Department of Biochemistry and Biophysics, Stockholm University

    Författare :Joachim Reimann; Pia Ädelroth; Peter Brzezinski; Michael Wilson; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; heme-copper oxidases; nitric oxide; proton transfer; electron transfer; proton-transfer pathway; biokemi; Biochemistry;

    Sammanfattning : Heme-copper oxidases (HCuOs) are best known as terminal oxidases in the aerobic respiratory chain, in which they catalyze the reduction of oxygen to water. By receiving protons and electrons from opposite sides of the membrane as well as pumping protons, HCuOs contribute to the electrochemical proton gradient over the membrane that can be used for ATP synthesis. LÄS MER

  4. 4. Experimental studies of proton translocation reactions in biological systems Electrogenic events in heme-copper oxidases

    Detta är en avhandling från Stockholm : Institutionen för biokemi och biofysik

    Författare :Håkan Lepp; Peter Brzezinski; Thomas Nilsson; ; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; heme-copper oxidase; cytochrome c oxidase; nitric oxide reductase; cbb3-type oxidase; proton pumping; uncoupling; charge-transfer; electrogenic event; flow-flash; TECHNOLOGY Engineering physics Biophysics; TEKNIKVETENSKAP Teknisk fysik Biofysik; Biophysics; biofysik;

    Sammanfattning : Terminal heme-copper oxidases (HCuOs) are transmembrane proteins that catalyze the final step in the respiratory chain - the reduction of O2 to H2O, coupled to energy conservation by generation of an electrochemical proton gradient. The most extensively investigated of the HCuOs are the aa3-type oxidases, to which cytochrome c oxidase (CytcO) belongs, which uses energy released in the O2-reduction for proton pumping. LÄS MER

  5. 5. Bacterial Terminal Oxidases. Studies in Bacillus subtilis

    Detta är en avhandling från Lena Winstedt, Department of cell and organism biology, Sölvegatan 12, S-223 62 Lund, Sweden

    Författare :Lena Winstedt; [2002]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mycology; virology; mykologi; bakteriologi; Mikrobiologi; bacteriology; Microbiology; di-copper center; cytochrome oxidase; Enterococcus faecalis; cytochrome bd; Bacillus subtilis; terminal oxidase; virologi;

    Sammanfattning : The final step in aerobic respiratory pathways is catalyzed by terminal oxidases. Bacteria generally have two or more terminal oxidases. Aerobically grown Bacillus subtilis synthesize three terminal oxidases: one cytochrome c oxidase, cytochrome caa3 and two quinol oxidases, cytochrome aa3 and cytochrome bd. LÄS MER