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Enzymatic Conversion of Pheophorbide a to the Precursor of Pyropheophorbide a in Leaves of Chenopodium album
It appears that the enzyme catalyzes the demethylation of the carbomethoxy group at C-13 2 of pheophorbide a by hydrolysis to yield methanol and the precursor, C-132carboxyl-pyropheoph orbide a, which is converted to pyropheophorbid a by spontaneous decarboxylation.
Distribution and Physiology of Aerobic Bacteria Containing Bacteriochlorophyll a on the East and West Coasts of Australia
- T. Shiba, Y. Shioi, Kenji Takamiya, D. Sutton, C. Wilkinson
- Environmental ScienceApplied and Environmental Microbiology
- 1 January 1991
Aerobic heterotrophic bacteria containing bacteriochlorophyll were isolated from specimens from a wide variety of marine environments on the west and east coasts of Australia and some strains showed denitrifying activity, and the optimal salinity for bacterial growth varied between strains.
Cloning of the gene for monogalactosyldiacylglycerol synthase and its evolutionary origin.
- M. Shimojima, H. Ohta, A. Iwamatsu, T. Masuda, Y. Shioi, K. Takamiya
- BiologyProceedings of the National Academy of Sciences…
- 7 January 1997
The deduced amino acid sequence of the MGDG synthase cDNA showed homology with MurG of Bacillus subtilis and E. coli, which encode a glycosyltransferase catalyzing the last step of peptidoglycan synthesis in bacteria, which implies that the machinery of chloroplast membrane biosynthesis is evolutionarily derived from that of cell wall biosynthesis in bacteria.
Re-examination of Mg-dechelation reaction in the degradation of chlorophylls using chlorophyllin a as a substrate
The Mg-dechelating activity of extracts of Chenopodium album (goosefoot) was investigated using an artificial substrate, chlorophyllin a, and the purified Mm-releasing protein showed neither peroxidase activity nor absorption bands in the visible region, and this indicates that the M g-re releasing protein is clearly distinct from horseradish peroxIDase, which is a heme-containing protein.
Identification of chlorophylls and carotenoids in major teas by high-performance liquid chromatography with photodiode array detection.
The separation and identification of pigments, chlorophylls, and carotenoids of seven teas and fresh leaf of tea (Camellia sinensis) by high-performance liquid chromatography (HPLC) are described.…
Conversion of chlorophyllide to pheophorbide by Mg-dechelating substance in extracts of Chenopodium album
The findings suggest that the substance catalyzing the conversion of chlorophyllide to pheophorbide, tentatively called Mg-dechelating substance, is involved in the breakdown ofchlorophylls.
Characterization and Cloning of the Chlorophyll-Degrading Enzyme Pheophorbidase from Cotyledons of Radish1
Among 12 substrates tested, both enzymes were extremely specific for Pheids of the dihydroporphyrin and tetrahydropoiryrin types, indicating that they are responsible for the formation of these PyroPheids.
Comparison of three Chlamydomonas strains which show distinctive oxidative stress tolerance.
Molecular cloning and characterization of a senescence-induced tau-class Glutathione S-transferase from barley leaves.
Senescence-induced tau-class GST (SIGST) in senescent leaves of barley is found and DNA sequence analysis shows that the cloned SIGST had only one base different from the barley embryo GST, ECGST, which indicates that SIGST is classified into the plant-specific tau class.
Purification and Characterization of Two Isozymes of Chlorophyllase from Mature Leaves of Chenopodium album
Chlorophyllase (Chlase) was purified from mature leaves of Chenopodium album, and its enzymatic properties were investigated, and the optimum pH and K m values of these two Chlases were similar.