Georg Schütz - Academia.edu (original) (raw)
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University of Arkansas Division of Agriculture
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Papers by Georg Schütz
BioTechniques, 2020
Species of the genus Trichoderma are filamentous fungi commonly used in research, industry and ag... more Species of the genus Trichoderma are filamentous fungi commonly used in research, industry and agriculture. Trichoderma reesei strains are prominent producers of cellulolytic and hemicellulolytic enzymes as well as being expression hosts; several other species such as T. atroviride might be exploited as biocontrol agents. A careful preparation of Trichoderma inocula, which consists mainly of conidia (asexual spores), is of immense importance. Conidia concentration is still mostly determined with the help of a hemocytometer; however, as a more accurate and time-saving alternative, absorbance can be used to estimate fungal spore counts. We established a spectrophotometric method for fast and reliable preparation of Trichoderma inocula by evaluating the effect of size, shape and pigmentation of the conidia at different wavelengths.
The Journal of biological chemistry, Jan 7, 2014
The most striking feature of mammalian peroxidases, including myeloperoxidase and lactoperoxidase... more The most striking feature of mammalian peroxidases, including myeloperoxidase and lactoperoxidase (LPO) is the existence of covalent bonds between the prosthetic group and the protein, which has a strong impact on their (electronic) structure and biophysical and chemical properties. Recently, a novel bacterial heme peroxidase with high structural and functional similarities to LPO was described. Being released from Escherichia coli, it contains mainly heme b, which can be autocatalytically modified and covalently bound to the protein by incubation with hydrogen peroxide. In the present study, we investigated the reactivity of these two forms in their ferric, compound I and compound II state in a multi-mixing stopped-flow study. Upon heme modification, the reactions between the ferric proteins with cyanide or H2O2 were accelerated. Moreover, apparent bimolecular rate constants of the reaction of compound I with iodide, thiocyanate, bromide, and tyrosine increased significantly and be...
BioTechniques, 2020
Species of the genus Trichoderma are filamentous fungi commonly used in research, industry and ag... more Species of the genus Trichoderma are filamentous fungi commonly used in research, industry and agriculture. Trichoderma reesei strains are prominent producers of cellulolytic and hemicellulolytic enzymes as well as being expression hosts; several other species such as T. atroviride might be exploited as biocontrol agents. A careful preparation of Trichoderma inocula, which consists mainly of conidia (asexual spores), is of immense importance. Conidia concentration is still mostly determined with the help of a hemocytometer; however, as a more accurate and time-saving alternative, absorbance can be used to estimate fungal spore counts. We established a spectrophotometric method for fast and reliable preparation of Trichoderma inocula by evaluating the effect of size, shape and pigmentation of the conidia at different wavelengths.
The Journal of biological chemistry, Jan 7, 2014
The most striking feature of mammalian peroxidases, including myeloperoxidase and lactoperoxidase... more The most striking feature of mammalian peroxidases, including myeloperoxidase and lactoperoxidase (LPO) is the existence of covalent bonds between the prosthetic group and the protein, which has a strong impact on their (electronic) structure and biophysical and chemical properties. Recently, a novel bacterial heme peroxidase with high structural and functional similarities to LPO was described. Being released from Escherichia coli, it contains mainly heme b, which can be autocatalytically modified and covalently bound to the protein by incubation with hydrogen peroxide. In the present study, we investigated the reactivity of these two forms in their ferric, compound I and compound II state in a multi-mixing stopped-flow study. Upon heme modification, the reactions between the ferric proteins with cyanide or H2O2 were accelerated. Moreover, apparent bimolecular rate constants of the reaction of compound I with iodide, thiocyanate, bromide, and tyrosine increased significantly and be...