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

   Författare :Eva Axelsson; Biokemi och Strukturbiologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry; 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

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

   Författare :Nick Sirijovski; Biokemi och Strukturbiologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Electron microscopy; Proteobacteria; 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

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

   Författare :Michel Fodje; Lunds universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular biophysics; pi-helix; 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

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

   Författare :Joakim Lundqvist; Biokemi och Strukturbiologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bioinformatik; biomathematics biometrics; 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

7. 5. Protein complexes in chlorophyll biosynthetic enzymes

   Författare :Ragna Peterson Wulff; Biokemi och Strukturbiologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; electron microscopy; mass spectrometry; Rhodobacter capsulatus; barley; cyclase; magnesium chelatase; chlorophyll biosynthetic pathway; Protein complex;

   Sammanfattning : Proteins are found on the inside, in the membrane, on the surface and on the outside of cells. They form complicated structures and they interact with other molecules and proteins. LÄS MER