En route to deoxygenated N-acetyllactosamine analogues employing uridyl and galactosyl transferases
摘要:
All monodeoxygenated galactoses were treated with galactokinase, and for the 2-, 3-, and 4-deoxy compounds, transformation into the corresponding galactopyranosyl phosphates could be observed. In case of the 2-deoxy derivative, further reaction via UDP-2-deoxy-D-lyxo-hexose (UDP-2-deoxygalactose), which was also obtained chemically, the multiple enzymatic system could be employed to prepare 2'-deoxy-N-acetyllactosamine. (C) 2009 Elsevier Ltd. Ail rights reserved.
Studies on the Substrate Specificity of <i>Escherichia coli</i> Galactokinase
作者:Jie Yang、Xun Fu、Qiang Jia、Jie Shen、John B. Biggins、Jiqing Jiang、Jingjing Zhao、Joshua J. Schmidt、Peng G. Wang、Jon S. Thorson
DOI:10.1021/ol034642d
日期:2003.6.1
rapidly synthesize sugar phosphates. Compared with chemical synthesis, enzymatic (kinase) routes to sugar phosphates would be attractive for this application. This work focuses upon the development of a high-throughput colorimetric galactokinase (GalK) assay and its application toward probing the substrate specificity and kineticparameters of Escherichia coli GalK. The demonstrated dinitrosalicylic
A highly efficient galactokinase from Bifidobacterium infantis with broad substrate specificity
作者:Lei Li、Yonghui Liu、Wenjun Wang、Jiansong Cheng、Wei Zhao、Peng Wang
DOI:10.1016/j.carres.2012.04.022
日期:2012.7
Galactokinase (GalK), particularly GalK from Escherichia coli, has been widely employed for the synthesis of sugar-1-phosphates. In this study, a GalK from Bifidobacterium infantis ATCC 15697 (BiGalK) was cloned and over-expressed with a yield of over 80 mg/L cell cultures. The k(cat)/K-m value of recombinant BiGalK toward galactose (164 s (1) mM (1) ) is 296 times higher than that of GalK from E. coli, indicating that BiGalK is much more efficient in the phosphorylation of galactose. The enzyme also exhibits activity toward galacturonic acid, which has never been observed on other wild type GalKs. Further activity assays showed that BiGalK has broad substrate specificity toward both sugars and phosphate donors. These features make BiGalK an attractive candidate for the large scale preparation of galactose-1-phosphate and derivatives. (C) 2012 Elsevier Ltd. All rights reserved.
Efficient chemoenzymatic synthesis of novel galacto-N-biose derivatives and their sialylated forms
作者:Lei Li、Yonghui Liu、Tiehai Li、Wenjun Wang、Zaikuan Yu、Cheng Ma、Jingyao Qu、Wei Zhao、Xi Chen、Peng G. Wang
DOI:10.1039/c5cc03746h
日期:——
Novel galacto-N-biose derivatives and their sialylated form were efficiently synthesizedviaone-pot two-enzyme systems starting with monosaccharides.
通过单糖开始,使用一锅两酶系统高效合成了新型半乳糖-N-生物素衍生物及其唾液酸化形式。
En route to deoxygenated N-acetyllactosamine analogues employing uridyl and galactosyl transferases
All monodeoxygenated galactoses were treated with galactokinase, and for the 2-, 3-, and 4-deoxy compounds, transformation into the corresponding galactopyranosyl phosphates could be observed. In case of the 2-deoxy derivative, further reaction via UDP-2-deoxy-D-lyxo-hexose (UDP-2-deoxygalactose), which was also obtained chemically, the multiple enzymatic system could be employed to prepare 2'-deoxy-N-acetyllactosamine. (C) 2009 Elsevier Ltd. Ail rights reserved.