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Báo cáo khoa học: Interactions of the peripheral subunit-binding domain of the dihydrolipoyl acetyltransferase component in the assembly of the pyruvate dehydrogenase multienzyme complex of Bacillus stearothermophilus

Chia sẻ: Nguyen Thang | Ngày: | Loại File: PDF | Số trang:9

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The enzymes pyruvate decarboxylase (E1) and dihydro-lipoyl dehydrogenase (E3) bind tightly but in a mutually exclusive manner to the peripheral subunit-binding domain (PSBD) of dihydrolipoyl acetyltransferase in the pyruvate dehydrogenase multienzyme complex of Bacillus stearo-thermophilus. The use of directed mutagenesis, surface plasmon resonance detection and isothermal titration microcalorimetry revealed that several positively charged residues of the PSBD, most notably Arg135, play an important part in the interaction with both E1 and E3, whereas Met131 makes a significant contribution to the binding of E1 only. ...

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Nội dung Text: Báo cáo khoa học: Interactions of the peripheral subunit-binding domain of the dihydrolipoyl acetyltransferase component in the assembly of the pyruvate dehydrogenase multienzyme complex of Bacillus stearothermophilus

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