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Mechanistic implications of Escherichia coli galactokinase structure-based engineering
被引:24
|作者:
Hoffmeister, D
[1
]
Thorson, JS
[1
]
机构:
[1] Univ Wisconsin, Sch Pharm, Lab Biosynthet Chem, Madison, WI 53705 USA
来源:
关键词:
carbohydrates;
enzymes;
glycorandomization;
kinases;
phosphosugars;
D O I:
10.1002/cbic.200400003
中图分类号:
Q5 [生物化学];
Q7 [分子生物学];
学科分类号:
071010 ;
081704 ;
摘要:
Engineering GalK: The Escherichia coli galactokinase GalK has been engineered in its active site. The amino acid exchanges Y223F and Y223W broadened the sugar-substrate spectrum to include, among others, 4-deoxy-D-galactose. This finding suggests that the role of Y223 is not primarily hydrogen bonding but rather a hydrophobic stacking to secure the hexopyranose ring in the active site.
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页码:989 / 992
页数:4
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