Download MendeleyThree-Dimensional Structures of the Mn and Mg Dtdp Complexes of the Family Gt-2 Glycosyltransferase Spsa: A Comparison with Related Ndp-Sugar Glycosyltransferases.
Tarbouriech, N., Charnock, S.J., Davies, G.J.(2001) J Mol Biol 314: 655
- PubMed: 11733986
- DOI: https://doi.org/10.1006/jmbi.2001.5159
- Primary Citation of Related Structures:
1H7L, 1H7Q - PubMed Abstract:
The vast majority of glycosidic-bond synthesis in nature is performed by glycosyltransferases, which use activated glycosides as the sugar donor. Typically, the activated leaving group is a nucleoside phosphate, lipid phosphate or phosphate. The nucleotide-sugar-dependent glycosyltransferases fall into over 50 sequence-based families, with the largest and most widespread family of inverting transferases named family GT-2. Here, we present the three-dimensional crystal structure of SpsA, the first and currently the only structural representative from family GT-2, in complex with both Mn-dTDP and Mg-dTDP at a resolution of 2 A. These structures reveal how SpsA and related enzymes may display nucleotide plasticity and permit a comparison of the catalytic centre of this enzyme with those from related sequence families whose three-dimensional structures have recently been determined. Family GT-2 enzymes, together with enzymes from families 7, 13 and 43, appear to form a clan of related structures with identical catalytic apparatus and reaction mechanism.
Organizational Affiliation:
Department of Chemistry, Structural Biology Laboratory, Heslington, Y010 5DD, UK.
