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
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.
引用
收藏
页码:989 / 992
页数:4
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