Sökning: "violaxanthin de-epoxidase VDE"

Hittade 5 avhandlingar innehållade orden violaxanthin de-epoxidase VDE.

  1. 1. Violaxanthin de-epoxidase and its closest relative: identification and characterization

    Författare :Kuo Guo; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Photosynthesis; Carotenoid conversions; violaxanthin de-epoxidase VDE ; Violaxanthin de-epoxidase related protein;

    Sammanfattning : Light is essential for plants and algae to process photosynthesis. However, excess of light will cause damage to the organism. A process called non-photochemical quenching (NPQ) is an important way for these organisms to protect themselves from photo oxidative damage. LÄS MER

  3. 2. Light Protection in Plants: Characterisation of Violaxanthin de-epoxidase

    Författare :Erik Hallin; Biokemi och Strukturbiologi; []
    Nyckelord :violaxanthin de-epoxidase; cysteine; disulphide bond; function; pH activation; oligomerisation; circular dichroism; crosslinking; small angle x-ray scattering;

    Sammanfattning : Plants and algae need light to drive the photosynthetic machinery. An excess of light will, however, result in damage to the photosynthetic machinery and to the rest of the organism. The surplus of energy, when exposed to light stress is converted into less harmful heat energy through a process called non-photochemical quenching. LÄS MER

  4. 3. Violaxanthin De-epoxidase and the Xanthophyll Cycle

    Författare :Anna Gisselsson; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plant biochemistry; zeaxanthin.; xanthophyll cycle; violaxanthin de-epoxidse; thylakoid; regulation; quenching; protonation; pH-dependence; light stress; histidine; Conformational change; domains; Växtbiokemi;

    Sammanfattning : The xanthophyll cycle is a mechanism for short term adaptation of plants to varying light intensities. It involves a reversible conversion of violaxanthin to zeaxanthin, via the intermediate antheraxanthin, upon high light intensities. LÄS MER

  5. 4. Xanthophyll Cycle in the Light of Thylakoid Membrane Lipids - Membrane Packing, Curvature Elastic Stress and Enzyme Binding

    Författare :Anna Szilagyi; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; steroider; Lipids; steroids; membranes; Lipider; enzymologi; HPLC; laurdan; fluorescence spectroscopy; Proteins; enzymology; Proteiner; curvature elastic stress; enzyme binding; thylakoid membrane; membrane fluidity; lipid packing; histidine; VDE; zeaxanthin; xanthophyll cycle; mebran;

    Sammanfattning : The xanthophyll cycle involves the light-dependent and reversible conversion of violaxanthin to zeaxanthin. The enzyme, violaxanthin de-epoxidase (VDE) catalyses the conversion of violaxanthin to zeaxanthin, via the intermediate antheraxanthin. VDE is a membrane-hosted enzyme during its activity. LÄS MER

  7. 5. The significance of feedback de-excitation

    Författare :Carsten Külheim; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arabidopsis thaliana; photosynthesis; feedback de-excitation; fitness; metabolomics; transcriptomics; Plant physiology; Växtfysiologi;

    Sammanfattning : During photosynthesis sunlight is absorbed by photosynthetic pigments and converted into organic compounds, such as carbohydrates. Photosynthesis needs to be highly regulated, since both too much and too little light are harmful to plant. LÄS MER