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Crystal structure of α-1,3-galactosyltransferase (α3GT) in a complex with p-nitrophenyl-β-galactoside (pNPβGal)


Reference:

Jamaluddin, H., Tumbale, P., Ferns, T. A., Thiyagarajan, N., Brew, K. and Acharya, K. R., 2009. Crystal structure of α-1,3-galactosyltransferase (α3GT) in a complex with p-nitrophenyl-β-galactoside (pNPβGal). Biochemical and Biophysical Research Communications, 385 (4), pp. 601-604.

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Official URL:

http://dx.doi.org/10.1016/j.bbrc.2009.05.111

Abstract

The specificities of glycosyltransferases make them useful for the synthesis of biologically active oligosaccharides, but also restrict their range of products. In substrate engineering, substrate promiscuity is enhanced by attaching removable interactive groups to weak substrates. Thus, the attachment of β p-nitrophenyl converts galactose from a poor into a good substrate of α-1,3-galactosyltransferase. The crystallographic structure of a complex of α3GT containing p-nitrophenyl-β-galactoside shows that the p-nitrophenyl binds similarly to the N-acetylglucosamine of the substrate, N-acetyllactosamine, interacting with the indole of Trp249. p-Nitrophenyl, unlike N-acetylglucosamine, makes no H-bonds but has more non-polar interactions, making it an effective monosaccharide mimetic.

Details

Item Type Articles
CreatorsJamaluddin, H., Tumbale, P., Ferns, T. A., Thiyagarajan, N., Brew, K. and Acharya, K. R.
DOI10.1016/j.bbrc.2009.05.111
Uncontrolled Keywordsα-1, crystal structure, substrate binding, enzyme kinetics, 3-galactosyltransferase, glycosyltransferase
DepartmentsFaculty of Science > Biology & Biochemistry
RefereedYes
StatusPublished
ID Code14979

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