Isolation and Characterization of Wild-Type Lipoxygenase LOXPsa1 from Pleurotus sapidus
-
Ina Plagemann
,
Ulrich Krings
The lipoxygenase LOXPsa1 of Pleurotus sapidus, originally investigated because of its ability to oxidize (+)-valencene to the valuable grapefruit aroma (+)-nootkatone, was isolated from the peptidase-rich lyophilisate using a three-step purification scheme including preparative isoelectric focusing and chromatographic techniques. Nano-liquid chromatography electrospray ionization tandem mass spectrometry (nLC-ESI-MS=MS) of the purified enzyme and peptide mass fingerprint analysis gave 38 peptides of the lipoxygenase from P. sapidus. Nearly 50% of the 643 amino acids long sequence encoded by the cDNA was covered. Both terminal peptides of the native LOXPsa1 were identified by de novo sequencing, and the postulated molecular mass of 72:5 kDa was confirmed. With linoleic acid as the substrate, the LOXPsa1 showed a specific activity of 113 U mg-1 and maximal activity at pH 7.0 and 30 °C, respectively.
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- Isolation and Characterization of Wild-Type Lipoxygenase LOXPsa1 from Pleurotus sapidus
- Molecular Cloning and Characterization of a Bombyx mori Gene Encoding the Transcription Factor Atonal
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Articles in the same Issue
- A New Ergostane Triterpenoid from a Solid Culture of the Basidiomycete Inocybe lilacina
- Non-Alkaloidal Compounds from the Bulbs of the Egyptian Plant Pancratium maritimum
- In vitro Investigation of Anticancer, Cell-Cycle-Inhibitory, and Apoptosis-Inducing Effects of Diversin, a Natural Prenylated Coumarin, on Bladder Carcinoma Cells
- Antileishmanial Compounds from Moringa oleifera Lam.
- Cytotoxic Polyacetylenes from the Red Sea Sponge Siphonochalina siphonella
- The Co-Occurrence of Two Pyridine Alkaloids, Mimosine and Trigonelline, in Leucaena leucocephala
- Aqueous Garlic Extract Alleviates Liver Fibrosis and Renal Dysfunction in Bile-Duct-Ligated Rats
- The Wheat Aquaporin Gene TaAQP7 Confers Tolerance to Cold Stress in Transgenic Tobacco
- Isolation and Characterization of Wild-Type Lipoxygenase LOXPsa1 from Pleurotus sapidus
- Molecular Cloning and Characterization of a Bombyx mori Gene Encoding the Transcription Factor Atonal
- Total Antioxidant Capacity of Feces of Mammalian Herbivores and Carnivores
- Direct Asymmetric Aldol Reactions Catalyzed by Lipase from Porcine Pancreas
