Sökning: "chelatase"

Visar resultat 1 - 5 av 7 avhandlingar innehållade ordet chelatase.

  1. 1. Magnesium Chelatase - a Key Enzyme in Chlorophyll Biosynthesis

    Detta är en avhandling från Eva Axelsson

    Författare :Eva Axelsson; Lunds universitet.; Lund University.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi; AAA-proteins; Chlorophyll biosynthesis; Magnesium chelatase;

    Sammanfattning : The biosynthesis of chlorophylls is an important process in nature. The green pigments play a fundamental role in absorbing and transferring solar energy to the photosynthetic apparatus. LÄS MER

  2. 2. Magnesium Chelatase: Insights into the first Step of Chlorophyll Biosynthesis

    Detta är en avhandling från KFS AB

    Författare :Nick Sirijovski; Lunds universitet.; Lund University.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Proteobacteria; Electron microscopy; Mutants; Rhodobacter capsulatus; Tetrapyrrole; Plant biochemistry; Växtbiokemi; Biochemistry; Metabolism; Biokemi; metabolism; Proteins; enzymologi; enzymology; Proteiner; Chlorophyll biosynthesis; AAA proteins; Magnesium chelatase; Barley; ATPase;

    Sammanfattning : The enzyme magnesium chelatase inserts magnesium into protoporphyrin IX (Proto) to produce to magnesium protoporphyrin IX, the first unique intermediate of the chlorophyll biosynthetic pathway. Magnesium chelatase is composed of three distinct proteins termed I (molecular weight ~40 kDa), D (~70 kDa) and H (~140 kDa). LÄS MER

  3. 3. Structure and mechanism of iron and magnesium chelatases - at the heme-chlorophyll branch-point

    Detta är en avhandling från Molecular Biophysics, Lund University

    Författare :Michel Fodje; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; pi-helix; Molecular biophysics; secondary structure; AAA; porphyrin metallation; chelatase; Molekylär biofysik;

    Sammanfattning : Tetrapyrroles are synthesised through a single branched biosynthetic pathway. Heme and chlorophyll are synthesised from the common intermediate protoporphyrin IX at the heme-chlorophyll branch-point. LÄS MER

  4. 4. Insights into structure and dynamics of the AAA+ motor of magnesium chelatase

    Detta är en avhandling från Molecular Biophysics, Lund University

    Författare :Joakim Lundqvist; Lunds universitet.; Lund University.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biomathematics biometrics; Bioinformatik; Bioinformatics; medical informatics; Rhodobacter capsulatus; Tetrapyrrole; Mutants; Magnesium chelatase; Cryo-Electron microscopy single-particle 3D reconstruction; Chlorophyll biosynthesis; AAA proteins; ATPase; medicinsk informatik; biomatematik; Molecular biophysics; Molekylär biofysik; Natural science; Naturvetenskap;

    Sammanfattning : The insertion of Mg2+ into protoporphyrin IX represents the first committed step in the chlorophyll and bacteriochlorophyll biosynthetic pathways. The reaction is catalyzed by the multisubunit enzyme Mg-chelatase, which consists of three subunits, known as I (molecular weight ~40 kDa), D (~70 kDa), and H (~140 kDa). LÄS MER

  5. 5. Ferrochelatase and Magnesiumchelatase: Metal chelation studied with mutants

    Detta är en avhandling från Mats Hansson, Biochemistry, Chemical Center, Lund University

    Författare :Ulf Olsson; Lunds universitet.; Lund University.; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; chlorophyll; Biochemistry; heme; barley; mutants; Magnesium chelatase; ferrochelatase; Metabolism; Biokemi; metabolism;

    Sammanfattning : Magnesium chelatase and ferrochelatase are two very important enzymes, which are involved in chlorophyll and heme biosynthesis, respectively. They both use protoporphyrin IX as substrate but magnesium chelatase inserts a magnesium ion whereas ferrochelatase inserts a ferrous ion. These two enzymes have been studied in this thesis. LÄS MER