Chapter 5 The Enzymes II of the phosphoenol-pyruvate-dependent carbohydrate transport systems
作者： J.S. Lolkema , G.T. Robillard
DOI: 10.1016/S0167-7306(08)60067-8
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摘要: Publisher Summary The Enzymes II (E-IIs) of the phosphoenolpyruvate (P-enolpyruvate)-dependent phosphotransferase system (PTS) are carbohydrate transporters found only in prokaryotes. They transport hexoses, hexitols, pentitols, and disaccharides. Carbohydrate occurs at expense P-enolpyruvate, concomitant with phosphorylation. entire process is characterized by a number phospho-enzyme intermediates. structural genes seventeen E-IIs E-IIIs have been sequenced. Sequence homology among all proteins very small; however, if divided into families, more evident. data, combination functional studies, reveal several classes E-IIs. These will most likely change expand as future studies define additional domains new functions. first class represented Escherichia coli Cel . This protein unique because it representative its class. It consists single hydrophobic peptide no hydrophilic domain attached either end.
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