Abstract
Aspergillus niger has been used successfully to secrete proteins labelled with 13C and/or 15N to a specific activity of > 99% for high resolution NMR analysis. In the case of a heterologous protein, hen egg-white lysozyme, 15N single-labelled and 13C, 15N double-labelled forms were secreted at yields of 100-200 mg l-1 by optimising the type of carbon source used and the ratio of carbon to nitrogen. Another protein, the glucoamylase starch-binding domain from A. niger, was also produced as the 15N single-labelled form at 20-40 mg l-1.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Aspergillus niger / genetics
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Aspergillus niger / metabolism*
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Binding Sites
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Carbon Isotopes
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Glucan 1,4-alpha-Glucosidase / biosynthesis*
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Glucan 1,4-alpha-Glucosidase / chemistry*
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Glucan 1,4-alpha-Glucosidase / genetics
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Isotope Labeling*
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Magnetic Resonance Spectroscopy
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Muramidase / biosynthesis*
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Muramidase / chemistry*
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Muramidase / genetics
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Nitrogen Isotopes
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Recombinant Proteins
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Structure-Activity Relationship
Substances
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Carbon Isotopes
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Nitrogen Isotopes
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Recombinant Proteins
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Muramidase
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Glucan 1,4-alpha-Glucosidase