Distinct Substrate Specificity and Catalytic Activity of the Pseudoglycosyltransferase VldE.
Distinct Substrate Specificity and Catalytic Activity of the Pseudoglycosyltransferase VldE.
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DOI:
10.1016/j.chembiol.2015.04.021
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发表时间:
2015-06-18
影响因子:
--
通讯作者:
Mahmud T
中科院分区:
文献类型:
--
作者:
Abuelizz HA;Mahmud T
The pseudoglycosyltransferase (PsGT) VldE is a glycosyltransferase-like protein that is similar to trehalose 6-phosphate synthase (OtsA). However, in contrast to OtsA, which catalyzes condensation between UDP-glucose and glucose 6-phosphate, VldE couples two pseudosugars to give a product with an α,α-N-pseudoglycosidic linkage. Despite their unique catalytic activity and important role in natural products biosynthesis, little is known about the molecular basis governing their substrate specificity and catalysis. Here, we report comparative biochemical and kinetic studies using recombinant OtsA, VldE, and their chimeric proteins with a variety of sugar and pseudosugar substrates. We found that the chimeric enzymes can produce hybrid pseudo-(amino)disaccharides and an amino group in the acceptor is necessary to facilitate a coupling reaction with a pseudosugar donor. Furthermore, we found that the N-terminal domains of the enzymes not only play a major role in selecting the acceptors, but also control the type of nucleotidyl diphosphate moiety of the donors.
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影响因子:
5.1
作者:
Flatt PM;Wu X;Perry S;Mahmud T
通讯作者:
Mahmud T
影响因子:
3.1
作者:
BOCK, K;GUZMAN, JF;YOKOI, S
通讯作者:
YOKOI, S
影响因子:
2.1
作者:
YOSHIKAWA, M;MURAKAMI, N;KITAGAWA, I
通讯作者:
KITAGAWA, I
影响因子:
3.2
作者:
Yang J;Xu H;Zhang Y;Bai L;Deng Z;Mahmud T
通讯作者:
Mahmud T
影响因子:
3.2
作者:
Brunkhorst, C;Andersen, C;Schneider, E
通讯作者:
Schneider, E