Overproduction, purification, and characterization of recombinant aspartate semialdehyde dehydrogenase from Arabidopsis thaliana.
Protein Expr. Purif.2002 Feb;24(1):99-104
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摘要
In plant and microorganisms, aspartate semialdehyde dehydrogenase (ASDH) produces the branch point intermediate between the lysine and threonine/methionine pathways. In this study, we report the first cDNA cloning, purification, and characterization of a plant ASDH. The Arabidopsis thaliana ASDH is an homodimeric enzyme composed of subunits of 36 kDa. The plant enzyme exhibited a specific activity of 26 micromol NADPH oxidized min(-1) mg(-1) of protein with a K(M) value for NADPH of 92 microM. ASDH showed cooperative behavior for aspartyl phosphate with a K(0.5) value of 37 microM.
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基因功能
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原始数据
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文献解读
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