2.7.7.64 | crystal structures of a USP in the APO-, UTP-, and UDP-sugar-bound forms is presented. The overall structure of the enzyme exhibits a significant structural homology to other nucleotidyldiphosphate-glucose pyrophosphorylases. The broad substrate specificity is strongly correlated with the flexibility of the SB-loop and, in contrast to UDP-glucose pyrophosphorylase of Leishmania major, the spacious sugar binding cavity as well as the multiple conformations observed for the residues involved in sugar moiety binding |
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